Quantum spin liquids quantum spin liquid phases. Medical search. Frequent questions

From investigating cold atoms to Einstein condensates, condensed matter physicists explore the fascinating realm of quantum field theory and superconducting solids. (freescience.info)
Condensed matter physics is a fascinating field that explores the physical properties of solids and liquids. (freescience.info)
While absorption spectroscopy can be used for liquid and solid phase analysis, it is arguably best suited for gas-phase analysis, as free gases are characterized by extremely sharp absorption lines, typically 100 - 10000 times sharper than those encountered in liquids and solids (as schematically illustrated in the figure on the front cover). (lu.se)

Quantum spin liquids generated further interest when in 1987 Anderson proposed a theory that described high temperature superconductivity in terms of a disordered spin-liquid state. (wikipedia.org)
The idea of quantum spin liquids is credited to Nobel laureate Philip W. Anderson, who also proposed the possible link to the emergence of high-temperature superconductivity when copper-oxide, or "cuprate," materials are doped with mobile charge carriers - that is, when atoms supplying additional electrons or electron vacancies are added. (bnl.gov)
So perhaps the idea that high-temperature superconductivity emerges from this quantum spin liquid state could, after all, be true. (bnl.gov)

A more modern characterization of quantum spin liquids involves their topological order, long-range quantum entanglement properties, and anyon excitations. (wikipedia.org)

Promising and currently the only candidate of the doped spin liquid is a triangular-lattice organic conductor, κ-(BEDT-TTF)4Hg2.89Br8, recently found to hold metallicity, spin-liquid-like magnetism and BEC-like superconductivity4-6. (researchsquare.com)
The Unit has a strong interest in frustrated magnetism, with an emphasis on quantum spin liquids and other unconventional phases of matter. (oist.jp)
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)
This field of study seeks to unravel the secrets behind fascinating phenomena like magnetism, superconductivity , phase transitions, and Einstein condensate. (freescience.info)
These unique samples were studied at the Paul Scherrer Institute by Elvezio Morenzoni and his team, who had developed an exquisite diagnostic technique called low-energy muon spin spectroscopy to detect and investigate magnetism in such ultrathin layers. (bnl.gov)

A particularly simple proposition pertains to spin ice on the highly frustrated pyrochlore lattice. (mpg.de)

We also establish the presence of three crystalline phases in this system. (mpg.de)

In resistivity, the non-Fermi liquid persists up to around 0.4-0.5 GPa and crosses over or transitions to a Fermi liquid 4, 6, 15 , as theoretically suggested 16 . (researchsquare.com)
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)
Landau theory is a cornerstone in condensed matter physics, providing insights into phase transitions. (freescience.info)
Phase transitions occur when a material undergoes a change in its physical state, such as from solid to liquid or from magnetic to non-magnetic. (freescience.info)
Landau theory describes these transitions by considering the order parameter, which characterizes the change in symmetry at different phases. (freescience.info)

To build a ground state without magnetic moment, valence bond states can be used, where two electron spins form a spin 0 singlet due to the antiferromagnetic interaction. (wikipedia.org)
UPTON, NY - Magnetic studies of ultrathin slabs of copper-oxide materials reveal that at very low temperatures, the thinnest, isolated layers lose their long-range magnetic order and instead behave like a "quantum spin liquid" - a state of matter where the orientations of electron spins fluctuate wildly. (bnl.gov)

Notably, a recent study of a heavy electron compound with a Kagome lattice, CePdAl, have found a quantum critical phase residing in a range of parameter space, not at a point, suggesting that a non-Fermi liquid phase is stabilised along with a quantum spin liquid (QSL) of f electrons 9 . (researchsquare.com)
A quantum spin liquid relies on an intrinsic property of the electrons in the material, the so-called spin. (ist.ac.at)
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)
In spintronic devices, the spin of electrons forms their most crucial characteristic. (azoquantum.com)
However, some past experimental findings haven't supported this proposal: Without doping, lanthanum-copper-oxide, one of the most studied cuprates, shows a form of long-range magnetic order known as anti-ferromagnetism - where spin orientations on adjacent electrons alternately point in exactly opposite directions - even at room temperature. (bnl.gov)

In this phase, interactions between the spins cause them to align into large-scale patterns, such as domains, stripes, or checkerboards. (wikipedia.org)
Localized spins are frustrated if there exist competing exchange interactions that can not all be satisfied at the same time, leading to a large degeneracy of the system's ground state. (wikipedia.org)
She developed a novel technique to measure the magnetic properties of candidate materials and learn about the interactions between spins. (ist.ac.at)
it seems that all complex spin interactions spread out across the material, and the measured spin interaction strength effectively vanishes. (ist.ac.at)
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)
The unique aspect of the Kitaev system is that due to the peculiar interactions among spins, it acts as a quantum spin liquid (QSL). (azoquantum.com)

We don't know for sure yet if ruthenium-trichloride is a quantum spin liquid, but it has a very nontrivial magnetic response when subjected to magnetic fields. (ist.ac.at)

Among them, quantum criticality has long been a focus of profound interest since strange metal, unconventional superconductivity and magnetic quantum phase transition all spring from a single point called a quantum critical point as extensively discussed in heavy electron systems and copper oxides 7, 8 . (researchsquare.com)

Quantum spin liquids (QSL) are generally characterized by their long-range quantum entanglement, fractionalized excitations, and absence of ordinary magnetic order. (wikipedia.org)
Ground states with large contributions of long range valence bonds have more low-energy spin excitations, as those valence bonds are easier to break up. (wikipedia.org)
Something very special about spin liquids is that they support exotic excitations, meaning excitations with fractional quantum numbers. (wikipedia.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)

The quantum spin liquid state was first proposed by physicist Phil Anderson in 1973 as the ground state for a system of spins on a triangular lattice that interact antiferromagnetically with their nearest neighbors, i.e. neighboring spins seek to be aligned in opposite directions. (wikipedia.org)
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)

A triangle of Ising spins (meaning that the only possible orientation of the spins are either "up" or "down"), which interact antiferromagnetically, is a simple example for frustration. (wikipedia.org)

Upon cooling, the spins will often enter a ferromagnet (or antiferromagnet) phase. (wikipedia.org)
We study the precessional spin dynamics of the Heisenberg pyrochlore antiferromagnet. (mpg.de)

Here's the problem: while scientists theoretically predicted quantum spin liquids in the 1970s, experiments on candidate materials since then have not identified the smoking-gun signature of this new state of matter. (ist.ac.at)

Quantum spin liquids offer a dramatic alternative to this typical behavior. (wikipedia.org)
This means that the actions of each spin determine the behavior of its neighbors. (ist.ac.at)
The central source of intellectual vitality and practical importance of condensed matter physics is the richness and diversity of behaviors exhibited by strongly interacting systems with many degrees of freedom, ranging from the collective behavior of neurons in the brain to the collective condensation of Cooper pairs that produce the macroscopic quantum phenomena associated with superconducting order. (stanford.edu)
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)

In condensed matter physics, a quantum spin liquid is a phase of matter that can be formed by interacting quantum spins in certain magnetic materials. (wikipedia.org)
The most prominent examples of emergent quasiparticles are the ones with fractional electric charge e/3 in quantum Hall physics. (mpg.de)
In physics, the term phase has two distinct meanings. (learner.org)
At the atomic and subatomic levels, particles follow quantum laws, not classical physics. (freescience.info)

The present results reveal that the quantum criticality in a doped spin liquid emerges in a phase, not at a point, and is involved in the unconventional BEC-like nature. (researchsquare.com)

But, in reality, small magnetic perturbations occurring on one edge of a Kitaev system do show up as variations in the spins at the opposite edge, although the perturbations do not appear to induce any variations in the magnetization of the central, more symmetrical region of the material. (azoquantum.com)

The Seebeck coefficient divided by temperature, S/T, is enhanced on cooling with logarithmic divergence indicative of quantum criticality. (researchsquare.com)
The quantum criticality in a phase instead of at a point and its possible relevance to QSL is an issue of profound significance. (researchsquare.com)
The present work aims to verify the quantum critical nature of the electronic state in κ-HgBr with pressure variation through thermoelectric effect which is very susceptible to quantum criticality, exploiting highly compressible feature of organic crystal 17 . (researchsquare.com)
Here, we report our observation of the thermoelectric signature of quantum criticality in the doped QSL phase and its possible relevance to superconductivity. (researchsquare.com)

The occurrence of such symmetries indicates that spins are correlated only with their closest neighbors and not with distant spins, which in turn implies that a barrier to spin transport must exist. (azoquantum.com)

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)

At IST Austria, Kimberly Modic and her team will use their expertise to investigate quantum spin liquids and other modern quantum materials. (ist.ac.at)

The Sinh-Gordon model is a 1+1 dimensional quantum field theory with a potential cosh(b phi) that is quite peculiar. (cern.ch)
This two-dimensional (2D) model includes a honeycomb network, each vertex of which hosts a spin. (azoquantum.com)

As part of the new study, researchers at Tokyo Tech and YNU, Japan, performed a theoretical examination of the unique spin transport properties of a specific system known as the "Kitaev model. (azoquantum.com)
An impulse magnetic field was applied to one edge of a Kitaev QSL to activate "spin packet" transport, and the real-time dynamics that emerged, as a result, were numerically simulated. (azoquantum.com)

There are two things that still distinguish a VBS from a spin liquid: First, by ordering the bonds in a certain way, the lattice symmetry is usually broken, which is not the case for a spin liquid. (wikipedia.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)
In the published paper, the research team describes potential materials, techniques to produce the spin perturbations, and methods to experimentally discover the evidence for the travel of Majorana fermions through the bulk of the material to reach the other edge. (azoquantum.com)

Scientists expected that specific preconditions like extremely cold temperatures or magnetic fields are necessary to observe a quantum spin liquid. (ist.ac.at)

Here, we report the thermoelectric signature that mobile holes in the spin liquid background is in a quantum critical state and it pertains to the BEC-like superconductivity. (researchsquare.com)
This work is motivated by and connected to recent experiments in the fields of quantum antiferromagnetism, high-temperature and heavy-fermion superconductivity, and nano-photonics. (usc.edu)
Quantum mechanics helps comprehend phenomena such as superconductivity or quantum tunneling, vital for advanced technologies like computer chips and quantum computers. (freescience.info)

The relation between the quantum critical phase and frustration has recently attracted intense attention 10, 11 . (researchsquare.com)
Dubbed spin frustration, this phenomenon makes spins to act in a specifically disordered way. (azoquantum.com)

Since March 2020, the Theory of Quantum Matter Unit has hosted regular online seminars and occasional online lecture series. (oist.jp)

If all spins are distributed to certain localized static bonds, this is called a valence bond solid (VBS). (wikipedia.org)
This kind of ground state wavefunction was proposed by P. W. Anderson in 1973 as the ground state of spin liquids and is called a resonating valence bond (RVB) state. (wikipedia.org)

According to the Pauli exclusion principle, it is not possible for identical fermions to occupy the same quantum state. (learner.org)
It should be pointed out that it is not feasible to explain spin transport mediated by Majorana fermions using classic spin-wave theory. (azoquantum.com)

This highly disordered phase is the generic state of magnets at high temperatures, where thermal fluctuations dominate. (wikipedia.org)

This leads to an increase of possible orientations (six in this case) of the spins in the ground state, enhancing fluctuations and thus suppressing magnetic ordering. (wikipedia.org)

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)

We plan to cover recent advances in many different approaches to quantum field theory, including Hamiltonian truncation, tensor networks, bootstrap methods, resurgence, and lattice field theory. (cern.ch)
The Theory of Quantum Matter Unit (TQM) is seeking to recruit a Postdoctoral Scholar. (oist.jp)

This phenomenon is expected from a quantum spin liquid and could be an indicator that ruthenium-trichloride is everything researchers have been hoping for. (ist.ac.at)

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)

The interaction among the spins within one copper-oxide plane is strong, while their interaction with the spins in the nearest copper-oxide plane (about 0.66 nanometers away) is ten thousand times weaker. (bnl.gov)

We demonstrate, by diffuse neutron scattering, the presence of such strings in the spin-ice Dy2Ti2O7. (mpg.de)
The resolution of such a small energy scale poses a challenge to state-of-the-art neutron spectroscopy, and, for this reason, three distinct scattering methods were applied: time-of-flight, polarized triple-axis, and neutron spin-echo spectroscopy. (mpg.de)

To achieve this, quantum mechanical fluctuations of the valence bonds must be allowed, leading to a ground state consisting of a superposition of many different partitionings of spins into valence bonds. (wikipedia.org)
We find excellent agreement of the whole data set with distinct contributions of transversal and longitudinal spin fluctuations. (mpg.de)
That means these fluctuations could not be of thermal origin and must be of quantum origin - quantum objects fluctuate even at zero temperature," Bozovic explained. (bnl.gov)

But physicists across the globe have been striving to discover viable means to produce and transport "spin packets" through materials. (azoquantum.com)

However, unlike other disordered states, a quantum spin liquid state preserves its disorder to very low temperatures. (wikipedia.org)

Many researchers, like IST Professor Kimberly Modic , seek an alternative approach and a new state of matter known as a quantum spin liquid might be the answer. (ist.ac.at)
Quantum mechanics is crucial in understanding the impact of superconducting science on condensed matter systems. (freescience.info)

The principles of quantum mechanics are the gateway to a faster and more secure means of computing. (ist.ac.at)

In this connection, it is notable that the organic conductor, κ-(BEDT-TTF) 4 Hg 2.89 Br 8 (abbreviated as κ-HgBr) is suggested to be a doped QSL that hosts a non-Fermi liquid phase in a finite pressure range. (researchsquare.com)
Remarkably, κ-HgBr shows non-Fermi liquidity and spin susceptibility well scaled to that of the spin liquid material, κ-(BEDT-TTF) 2 Cu 2 (CN) 3 , thus suggesting that κ-HgBr hosts a doped QSL 5 . (researchsquare.com)

However, thinner slabs that contained just one or two copper-oxide layers showed an unexpected result: "While the magnetic moments, or spins, were still present and had about the same magnitude, there was no long-range static anti-ferromagnetic order, not even on the scale of a few nanometers. (bnl.gov)

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)

The group also maintains strong links with experimental groups developing and studying new quantum materials. (oist.jp)

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)

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