Antiferromagnet quantum spin liquid phases. Medical search. Frequent questions

Our paper exploring the field dependence of the spin excitations and the formation of static order in NaYbO2 was published today in Phys. (ucsb.edu)
Negative muon spin relaxation in water and ice - Yoko Kimura (Dept. Phys. (stfc.ac.uk)

We study the quantum dimer model on the triangular lattice, which is expected to describe the singlet dynamics of frustrated Heisenberg models in phases where valence bond configurations dominate their physics. (mpg.de)
In this review, we provide an elementary introduction to these concepts and we survey the thermodynamics, statics and dynamics - in and out of equilibrium - of spin ice from these vantage points. (mpg.de)
We study the precessional spin dynamics of the Heisenberg pyrochlore antiferromagnet. (mpg.de)
Using semi-classical molecular-dynamics (MD) simulations , we are able to reproduce many of the features seen in experiments on Ca10Cr7O28, and to provide the first explanation of the origin of its spin-liquid behaviour. (oist.jp)
133. S.A. Zvyagin, Spin dynamics in quantum sine-Gordon chains: high-field ESR studies, Appl. (hzdr.de)
We further explore the crystal field Hamiltonian as well as the spin dynamics of the field-induced ordered state in this material. (ucsb.edu)
Structural and dynamical properties of methane hydrate under high pressure via Raman spectroscopy and first-principles molecular dynamics including nuclear quantum effects. (sciencesconf.org)
Abhishek Kejriwal, B.Tech+M.Tech, 2020-2023 -- Spin dynamics in Nitrogen vacancy centers in Diamond (co-supervised with Kasturi Saha, Elec. (iitb.ac.in)

Extreme examples of complex quantum entanglement arise in metallic states of matter without quasiparticle excitations, often called strange metals. (wikipedia.org)
In practice, given a state of quantum matter, it is difficult to completely rule out the existence of quasiparticles: while one can confirm that certain perturbations do not create single quasiparticle excitations, it is almost impossible to rule out a non-local operator which could create an exotic quasiparticle in which the underlying electrons are non-locally entangled. (wikipedia.org)
P.W. Anderson proposed that Mott insulators realize antiferromagnets which could form resonating valence bond (RVB) or quantum spin liquid states with an energy gap to spin excitations without breaking time-reversal symmetry. (wikipedia.org)
It was conjectured that such RVB states have excitations with fractional quantum numbers, such as a fractional spin 1/2. (wikipedia.org)
Quantum spin liquid (QSL) is a state of matter characterized by fractionalized quasiparticle excitations, quantum entanglement, and a lack of long-range magnetic order. (aps.org)
A variety of magnetic compounds have been regarded as the 1D antiferromagnetic (AF) Heisenberg chain model [ 3 - 9 ], whose ground state resides in a Tomonaga-Luttinger liquid (TLL) characterized by spinon quasiparticles with gapless elementary excitations [ 10 , 11 ]. (frontiersin.org)
We find, in contrast to the square lattice, that there is a truly short ranged resonating valence bond (RVB) phase with no gapless collective excitations and with deconfined, gapped, spinons for a finite range of parameters. (mpg.de)
The spin ice compounds Dy 2 Ti 2 O 7 and Ho 2 Ti 2 O 7 are highly unusual magnets which epitomize a set of concepts of great interest in modern condensed matter physics: their low-energy physics exhibits an emergent gauge field and their excitations are magnetic monopoles which arise from the fractionalization of the microscopic magnetic spin degrees of freedom. (mpg.de)
We also reveal a continuum of inelastic spin excitations, which resemble predictions for the fractionalized, topological excitations of a quantum spin ice. (nature.com)
Specific Heat Study of 1D and 2D Excitations in the Layered Frustrated Quantum Antiferromagnets Cs 2 CuCl 4-x Br x . (mpg.de)
2] Laughlin R B. Anomalous Quantum Hall Effect: An Incompressible Quantum Fluid with Fractionally Charged Excitations[J]. Physical Review Letters, 1983, 50(18): 1395-1398. (sustech.edu.cn)

Their results were reported in Nature Physics ( 'Large anomalous Hall effect in a half-Heusler antiferromagnet' ). (nanowerk.com)

The proposals for realization of topological states out of equilibrium and bosonic topological phases have recently appeared. (su.se)

Herein, we study the QPT and thermodynamics of 1D spin-1/2 anisotropic Heisenberg antiferromagnetic chains by Green's function theory. (frontiersin.org)
We study the ground-state and low-energy properties of classical vector spin models with nearest-neighbour antiferromagnetic interactions on a class of geometrically frustrated lattices which includes the kagome and pyrochlore lattices. (mpg.de)
Using a triple axis spectrometer (BT-7), they studied the scattering of neutrons from carefully aligned single crystals in the low temperature antiferromagnetic phase including in different magnetic field conditions. (nanowerk.com)
and non-Fermi-liquid specific heat and susceptibility can be interpreted in a unified way by assuming nested antiferromagnetic spin fluctuations in a quasi-two-dimensional electronic system. (go.jp)

Kagome lattice magnets are celebrated for the their "spin-liquid" behaviour, in which magnetic moments fail to order, and instead play host to new forms of magnetic excitation. (oist.jp)
Both the classical and quantum Heisenberg antiferromagnets on a Kagome lattice have been studied in great detail, and continue to provide rich inspiration to theorists and experimentalists alike. (oist.jp)
Secondly, we explore the dynamical properties of a spin liquid on a bilayer breathing-Kagome lattice, motivated by the experiments on the new spin-liquid system, Ca10Cr7O28 [Balz et al. (oist.jp)
a "spiral spin liquid" and, at finite energy, the spin--liquid correlations familiar from the Kagome-lattice antiferromagnet. (oist.jp)
We report the synthesis, crystal structure, and magnetic properties of Co2+ kagome magnets Co3V2O7(OH)(2)middot2H(2)O and BaCo3(VO4)(2)(OH)(2), which can be recognized as Co analogs of the intensively researched quantum kagome magnet volborthite Cu3V2O7(OH)(2)middot2H(2)O and vesignieite BaCu3(VO4)(2)(OH)(2). (tuat.ac.jp)

I study topics related to quantum phase transitions, superconductivity, and nanotechnology. (usc.edu)
Recently, we have applied the stochastic series expansion algorithm to study field induced phase transitions in quantum spin liquids, developed optimization algorithms to construct nano-scale opto-electronic devices, and generalized the BCS (Bardeen-Cooper-Schrieffer) theory to investigate the consequences of unconventional superconductivity in strongly correlated materials. (usc.edu)
By constructing variational wave functions for polarons, molecules and trimers, I will explore the quantum phase transitions between each of these bound states as a function of mass ratio and interaction strength. (su.se)
When the mass of impurity atom is sufficiently light, I find that these transitions lie outside the region of superfluid-normal phase separation in spin-imbalanced Fermi gases and should thus be observable in experiment, unlike the well-studied equal-mass case. (su.se)

Electron spin resonance study on the 4f honeycomb quantum magnet YbCl 3 . (mpg.de)

When magnetic field is applied along the a -axis, both T -linear and T -logarithmic behavior at higher temperature are suppressed, and we observe multiple magnetically ordered phases in the H-T phase diagram. (aps.org)
The quantum phase diagram is renormalized by the anisotropy (∆), which manifests a quantum critical point (QCP) h c = 1 + ∆ signaling the transition from gapless Tomonaga-Luttinger liquid (TLL) to gapped ferromagnetic (FM) state, demonstrated by the magnetic entropy and thermal Drude weight. (frontiersin.org)
We find a very rich phase diagram, containing both ordered and spin-liquid regimes, as well as a very unusual reentrant form of paramagnetism [Pohle et al. (oist.jp)
This paper showed that the Ce moments form a long-range ordered Neel state below ~6K, and suggest that this system presents an example of a material with a substantial J1/J2 ratio on the Heisenberg J1-J2 phase diagram on a distorted diamond lattice. (ucsb.edu)
Néel temperature and reentrant H-T phase diagram of quasi-two-dimensional frustrated magnets. (mpg.de)

Experimental signatures of quantum and topological states in frustrated magnetism. (mpg.de)
Spin-orbit coupled molecular quantum magnetism realized in inorganic solid. (mpg.de)
1990 Vordiplom Physics: Technical University of Berlin 1995 PhD Physics: Florida State University 1998 - present: faculty member at the University of Southern California My research group is interested in topics related to quantum magnetism, superconductivity, and nanotechnology. (usc.edu)
My group is interested in topics related to quantum magnetism, superconductivity, and nanotechnology. (usc.edu)
Quantum magnetism of ferromagnetic spin dimers in α- KVOPO 4 . (mpg.de)
Quasi-one-dimensional magnetism in the spin-1\2 antiferromagnet BaNa 2 Cu(VO 4 ) 2 . (mpg.de)

Halloran T., " Geometrical and Kitaev Frustration in Spin-Orbit Coupled Magnets ", Ph.D. Dissertation, Johns Hopkins University (2023). (ornl.gov)
Li Y., LaBarre P.G., Pajerowski D.M., Ramirez A.P., Rosenkranz S., Phelan D., " Neutron scattering study of fluctuating and static spin correlations in the anisotropic spin glass Fe 2 Ti O 5 ", Physical Review B, 107, 014405 (2023). (ornl.gov)
Sherman N.E., " Transport and Spectral Functions in Low-dimensional Quantum Spin Systems ", Ph.D. Dissertation, University of California Berkeley (2023). (ornl.gov)
Smith E.M., " The Dipole-Octupole Quantum Spin Ice Candidate Ce2Zr2O7 ", Ph.D. Dissertation, McMaster University (2023). (ornl.gov)

Remarkably, there is an intimate connection between the quantum physics of strange metals found in modern materials (which can be studied in tabletop experiments), and quantum entanglement near black holes of astrophysics. (wikipedia.org)
The most prominent examples of emergent quasiparticles are the ones with fractional electric charge e/3 in quantum Hall physics. (mpg.de)
Such phases offer promising perspectives for device applications in quantum information technologies, and their study can reveal new physics in quantum matter. (nature.com)
Taken together, these two signatures suggest that the low-energy physics of Pr 2 Hf 2 O 7 can be described by emergent quantum electrodynamics. (nature.com)
In physics, the term phase has two distinct meanings. (learner.org)
The major direction in modern condensed matter physics concerns the study of topological states of quantum matter, which show robust features due to the nontrivial global characteristics of the underlying wave functions, manifested in, for example, quantized conductance and robust gapless boundary states. (su.se)
Namely, the Kondo physics becomes suppressed and all properties are governed by spin ordering. (osti.gov)
article{osti_1559123, title = {Physics of Arbitrarily Doped Kondo Lattices: from a Commensurate Insulator to a Heavy Luttinger Liquid and a Protected Helical Metal}, author = {Tsvelik, Alexei M. and Yevtushenko, O. M.}, abstractNote = {We study one-dimensional Kondo Lattices (KL) which consist of itinerant electrons interacting with Kondo impurities (KI) - localized quantum magnetic moments. (osti.gov)
6] Moore G, Read N. Nonabelions in the Fractional Quantum Hall-Effect[J]. Nuclear Physics B, 1991, 360(2-3): 362-396. (sustech.edu.cn)
7] Wen X G. Topological Orders and Chern-Simons Theory in Strongly Correlated Quantum Liquid[J]. International Journal of Modern Physics B, 1991, 05(10): 1641-1648. (sustech.edu.cn)
This conference is a part of the NORDITA program on "Quantum solids, liquids, and gases" and will focus on frontiers in physics of quantum solids, liquids and gases (defined in a broad sense). (su.se)

We investigate microscopic models of interacting electronic systems, and use numerical techniques, such as Quantum Monte Carlo, Renormalization Group and Exact Diagonalization, to find their phase diagrams, ground state properties, and excitation spectra. (usc.edu)
My research group investigates microscopic models of interacting electronic systems, using numerical techniques such as Quantum Monte Carlo, to understand their phase diagrams, thermodynamic properties, and excitation spectra. (usc.edu)

The energy of the highest occupied quantum state defines the energy of the Fermi surface, which is a surface of constant energy in momentum space. (learner.org)
In this talk, I will consider an atomic Fermi gas in the limit of extreme spin imbalance, where one has a single spin-down impurity atom interacting attractively with a spin-up atomic Fermi gas. (su.se)

form highly frustrated lattices of molecular dimers in which strong correlations give rise to Mott insulating states situated close to the metal-to-insulator phase boundary. (mdpi.com)
This intriguing region is featured by the absence of energy scales other than temperature as well as the corresponding critical properties of quantum correlations or thermodynamic quantities, which culminate into scaling characteristic and universality [ 3 - 6 ]. (frontiersin.org)

Here we show that magnetic monopoles do emerge in a class of exotic magnets known collectively as spin ice: the dipole moment of the underlying electronic degrees of freedom fractionalises into monopoles. (mpg.de)
Balents, L. Spin liquids in frustrated magnets. (nature.com)
Gingras, M. J. P. & McClarty, P. A. Quantum spin ice: a search for gapless quantum spin liquids in pyrochlore magnets. (nature.com)
Magnets with "frustrated" interactions play host to great many novel phenomena, and have come to play a central role in the search for new phases of matter. (oist.jp)
Frustrated two dimensional quantum magnets. (mpg.de)

Up to the critical field B c = J (1+∆)/ gμ B , a QPT occurs from TLL to a spin polarized ferromagnetic (FM) state with an excitation gap opened up by the field [ 14 ]. (frontiersin.org)

A transverse field induces an Ising QPT with gapless quantum criticality and self-duality of QCP [ 15 ]. (frontiersin.org)

Sachdev's research describes the connection between physical properties of modern quantum materials and the nature of quantum entanglement in the many-particle wavefunction. (wikipedia.org)

In a quantum spin liquid, the magnetic moments of the constituent electron spins evade classical long-range order to form an exotic state that is quantum entangled and coherent over macroscopic length scales 1 , 2 . (nature.com)
Electron spin resonance on the spin-1/2 triangular magnet NaYbS 2 . (mpg.de)

In fact, due to that the absolute zero temperature cannot be attained experimentally, the field-induced quantum criticality has been intensively investigated by using the field dependence of magnetization measurement to determine the kink at finite temperature [ 3 , 6 , 9 , 13 , 16 ], which becomes rounded such that the QCP cannot be measured exactly. (frontiersin.org)
Maryunina, A.S. Bogomyakov, V.I. Ovcharenko, S.A. Zvyagin, M.V. Fedin, and S.L. Veber, High-field EPR of copper(ii)-nitroxide compound exhibiting three-step phase transition: structural insights from the field-induced sample orientation, Dalton Trans. (hzdr.de)
Rev. B. This work reveals a first order phase boundary out of the field induced up-up-down state in this quantum spin liquid candidate system. (ucsb.edu)
Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid NaYbSe 2 . (mpg.de)

And this similarity to quantum matter without quasiparticles is not a co-incidence: for the SYK models, Sachdev had argued that the strange metal has a holographic dual description in terms of the quantum theory of black holes in a curved spacetime with 1 space dimension. (wikipedia.org)
This quantum-coherent regime has quasiparticles that are predicted to behave like magnetic and electric monopoles, along with a gauge boson playing the role of an artificial photon. (nature.com)
Inelastic neutron scattering has also been used to study acoustic oscillations and their corresponding quasiparticles in liquids. (learner.org)
Magnons are the quasiparticles associated with spin waves in a crystal lattice. (learner.org)

Sachdev proposed a solvable model of a strange metal (a variant of which is now called the Sachdev-Ye-Kitaev (SYK) model), which was shown to saturate such a bound on the time to reach quantum chaos. (wikipedia.org)

An antiferromagnet is a magnet in which the microscopic magnetic moments inside the material line up in a grid on which neighboring moments point in opposite directions. (learner.org)

Anisotropic superconductivity and quantum oscillations in the layered dichalcogenide TaSnS 2 . (mpg.de)

Sachdev argued instead that it is better to examine how rapidly the system loses quantum phase coherence, or reaches local thermal equilibrium in response to general external perturbations. (wikipedia.org)

Quantum oscillations and band-structure calculations. (mpg.de)
We show that this leads to spin-asymmetric Josephson oscillations and provide an explanation of this intriguing phenomenon which also gives new information about the traditional Josephson effect. (su.se)

Yb delafossites: Unique exchange frustration of 4f spin-1/2 moments on a perfect triangular lattice. (mpg.de)

Tsui D C, Stormer H L, Gossard A C. Two-Dimensional Magnetotransport in the Extreme Quantum Limit[J]. Physical Review Letters, 1982, 48(22): 1559-1562. (sustech.edu.cn)
3] Jain J K. Composite-Fermion Approach for the Fractional Quantum Hall Effect[J]. Physical Review Letters, 1989, 63(2): 199-202. (sustech.edu.cn)
4] Haldane F D M. Fractional Quantization of the Hall Effect: A Hierarchy of Incompressible Quantum Fluid States[J]. Physical Review Letters, 1983, 51(7): 605-608. (sustech.edu.cn)

A particularly simple proposition pertains to spin ice on the highly frustrated pyrochlore lattice. (mpg.de)
However, this emergent lattice quantum electrodynamics has proved elusive in experiments. (nature.com)
We find a quasi-elastic structure factor with pinch points-a signature of a classical spin ice-that are partially suppressed, as expected in the quantum-coherent regime of the lattice field theory at finite temperature. (nature.com)
Strong quantum fluctuations in a quantum spin liquid candidate with a Co-based triangular lattice" R. Zhong, S. Guo, G. Xu, Z. Xu, R. J. Cava. (moore.org)
Effective Spin-1/2 Moments on a Yb 3+ Triangular Lattice: An ESR Study. (mpg.de)
Magneto-Structural Properties of the Layered Quasi-2D Triangular-Lattice Antiferromagnets Cs 2 CuCl 4-x Br x for x =0, 1, 2, and 4. (mpg.de)
Absence of magnetic order and emergence of unconventional fluctuations in the J eff =1/2 triangular-lattice antiferromagnet YbBO 3 . (mpg.de)
Diluting a triangular-lattice spin liquid: Synthesis and characterization of NaYb 1-x Lu x S 2 single crystals. (mpg.de)
First, the FFLO phase in one dimensional optical lattice and a direct way to observe it as narrowing of the hopping modulation spectrum. (su.se)

Benton, O., Sikora, O. & Shannon, N. Seeing the light: experimental signatures of emergent electromagnetism in a quantum spin ice. (nature.com)

Putative spin-nematic phase in BaCdVO(PO 4 ) 2 . (mpg.de)

Here we report neutron scattering measurements of the rare-earth pyrochlore magnet Pr 2 Hf 2 O 7 that provide evidence for a quantum spin ice ground state. (nature.com)
Hermele, M., Fisher, M. P. A. & Balents, L. Pyrochlore photons: the U (1) spin liquid in a S = ½ three-dimensional frustrated magnet. (nature.com)
The latter was observed through the so-called Berry phase corrections to electronic behavior, where they saw the largest such response reported to date in this type of magnet, which is known as an antiferromagnet. (nanowerk.com)

Near the QCP, a QC regime emerges at finite temperatures in an extended parameter space attributed to the interplay between quantum and thermal fluctuations [ 2 ]. (frontiersin.org)

After introducing the concept of emergence, the unit examines emergent behavior in solid matter, quantum plasmas, and the very different behavior of the liquid forms of two different isotopes of helium (He). (learner.org)
The helical metals can provide a unique platform for realization of an emergent protection of ballistic transport in quantum wires. (osti.gov)

A quantum phase transition (QPT) takes place at zero temperature, as a result of the quantum fluctuations arising from Heisenberg uncertainty relation [ 1 ]. (frontiersin.org)

Synthesis and characterization of the novel antiferromagnet LaNiB3O7" K.M. Powderly, S. Guo, K. Stolze, E. M. Carnicom, R.J. Cava. (moore.org)

Trimer-based spin liquid candidate Ba4NbIr3O12" L. T. Nguyen, R. J. Cava. (moore.org)
Gd_2 Sn_2 O_7 and also Ag_3 Li Ir_2 O_6) comparable to that of many spin liquid candidate materials. (iitb.ac.in)

We study one-dimensional Kondo Lattices (KL) which consist of itinerant electrons interacting with Kondo impurities (KI) - localized quantum magnetic moments. (osti.gov)

The spin ice state is argued to be well-described by networks of aligned dipoles resembling solenoidal tubes - classical, and observable, versions of a Dirac string. (mpg.de)
In short, for SU(4) there is a continuous quantum phase transition from a Dirac liquid to a Neél antiferromagnet similar to SU(2), while for SU(6) (and greater) there is a strong first-order transtion from the Dirac liquid to a valence bond solid. (iitb.ac.in)

According to the Pauli exclusion principle, it is not possible for identical fermions to occupy the same quantum state. (learner.org)
In a system with many identical fermions, such as electrons in a metal, the fermions fill in the available quantum states in order of increasing energy. (learner.org)

Sachdev showed that antiferromagnets with half-integer spin form odd Z2 spin liquids, and those with integer spin form even Z2 spin liquids. (wikipedia.org)

Usually, it manifests that the ground state of a quantum system changes upon tuning an external nonthermal parameter such as pressure or magnetic field to a critical value, which is marked by a quantum critical point (QCP) for a continuous transition. (frontiersin.org)
This enables us to account for a mysterious phase transition observed experimentally in spin ice in a magnetic field, which is a liquid-gas transition of the magnetic monopoles. (mpg.de)
These experiments provided the ability to map the behavior of the magnetic gadolinium spins to precisely know their orientation and response to temperature and magnetic field. (nanowerk.com)

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