- Half-integer quantized anomalous thermal Hall effect in the Kitaev.
- [2106.05290] Pseudoscalar U(1) spin liquids in $α$-RuCl$_3$.
- RUL - Experimental Detection of a Quantum Spin Liquid.
- Quantum spin liquid - Wikipedia.
- STUDY OF THE ELECTRONIC PROPERTIES OF RUCL A THESIS Presented to the.
- Kitaev quantum spin liquid response in RuCl3 | Neutron.
- 2D proximate quantum spin liquid state in atomic-thin α-RuCl3.
- Neutron scattering in the proximate quantum spin liquid α.
- Honeycomb‐Structure RuI3, A New Quantum Material Related to α‐RuCl3.
- Multiple spin-orbit excitons in α-RuCl3 from bulk to.
- (PDF) $\alpha$-RuCl3: a Spin-Orbit Assisted Mott Insulator on a.
- Neutron scattering in the proximate quantum spin liquid -RuCl.
Half-integer quantized anomalous thermal Hall effect in the Kitaev.
Frustrated magnets with strong spin-orbit coupling promise to host topological states of matter, with fractionalized excitations and emergent gauge fields. Kitaev's proposal for a honeycomb-lattice Majorana spin liquid has triggered an intense search for experimental realizations, with bond-dependent Ising interaction being the essential building block. A prime candidate is $α$-RuCl$_3$ whose. The quantum spin liquid state (QSLs) is a recently proposed third ground state of quantum magnet [1-4].Unlike the known anti-ferromagnetic (AFM) and ferromagnetic (FM) states, the spins in the QSLs do not order in the ground state, but exhibit long-range quantum entanglement [].Finding experimental evidence of the QSLs in real materials has been a long-sought goal in condensed matter physics. Feb 01, 2018 · Consequently, there has been enormous interest in exploring possible material realizations of Kitaev physics and several candidate materials have been put forward, recently including α-RuCl3. In the absence of a magnetic field this material orders at a finite temperature and exhibits low-energy spin wave excitations.
[2106.05290] Pseudoscalar U(1) spin liquids in $α$-RuCl$_3$.
Nov 10, 2020 · Spin-orbit excitations and electronic structure of the putative Kitaev magnet α-RuCl3. March 6, 2016. March 6, 2016. Kenneth Burch Crystal Electric Field, Infrared Spectroscopy, Orbital, Raman, RuCl3, Spin-Orbit. Mott insulators with strong spin-orbit coupling have been proposed to host unconventional magnetic states, including the Kitaev. Recently, α-RuCl 3 has attracted much attention as a possible material to realize the honeycomb Kitaev model of a quantum-spin-liquid state. Although the magnetic properties of α-RuCl 3 have been extensively studied, its electronic structure, which is strongly related to its Kitaev physics, is poorly understood. Here, the electronic structure of α-RuCl 3 was investigated by photoemission.
RUL - Experimental Detection of a Quantum Spin Liquid.
The Kitaev quantum spin liquid displays the fractionalization of quantum spins into Majorana fermions. The emergent Majorana edge current is predicted to manifest itself in the form of a finite thermal Hall effect, a feature commonly discussed in topological superconductors. Here we report on thermal Hall conductivity $κ_{xy}$ measurements in $α$-RuCl$_3$, a candidate Kitaev magnet with the. Here we report the first Raman scattering study on phonon-magnetic scattering coupling, proximate quantum spin liquid ground state and collective fractionalized excitations in exfoliated α-RuCl3 atomic layers. Our results uncover that 2D α-RuCl3 could harbour the unusual magnetic continuum, serving as a hallmark of the 2D proximate quantum….
Quantum spin liquid - Wikipedia.
A quantum spin liquid is a state of matter in which interacting quantum spins do not align even at lowest temperatures, but.... (III) chloride, RuCl3. This antiferromagnetic material closely resembles the ideal Kitaev honeycomb model for a spin liquid, and undergoes a transition to a spin liquid at a temperature of 0.5 K in the presence of a.
STUDY OF THE ELECTRONIC PROPERTIES OF RUCL A THESIS Presented to the.
The Kitaev model predicts an exact realization of the quantum spin liquid ground state. We search for experimental evidence of such states in real materials predicted to host the necessary Kitaev interactions. Our studies are done primarily using magnetic resonance on the candidates α-RuCl3 and BaCo2(AsO4)2. These exchange interactions were critical to fit the data which left an almost negligible isotropic Heisenberg exchange coupling in α-RuCl3. Quantum spin liquid. When you cool down a conventional magnet, the magnetic spins will eventually freeze into an ordered state, where each of the spins align with each other. In this frequency regime we expect signatures of fractionalized excitations of the Kitaev-type spin-liquid. The dielectric loss as documented in figure 3 reveals a temperature independent excitation close to 2.5 meV, which exits up to room temperature and a broad excitation around 7 meV, which only exists in the low-temperature rhombohedral.
Kitaev quantum spin liquid response in RuCl3 | Neutron.
Α − RuCl 3 is a leading candidate material for the observation of physics related to the Kitaev quantum spin liquid (QSL). By combined susceptibility, specific-heat, and nuclear-magnetic-resonance measurements, we demonstrate that α − RuCl 3 undergoes a quantum phase transition to a QSL in a magnetic field of 7.5 T applied in the a b plane. We show further that this high-field QSL phase.. Scientists have focused attention and research on the so-called Kitaev-type of spin liquid, named in honor of the Russian scientist, Alexei Kitaev, who first proposed it. In particular, they have looked extensively at two materials - RuCl3 and Na2IrO - as candidates for this type. Both have small quantum spin numbers.
2D proximate quantum spin liquid state in atomic-thin α-RuCl3.
The ground state in this exactly solvable model is a spin liquid state, i.e., a highly entangled topological state of matter without long-range magnetic order where spin-flip excitations.. In 2006 Alexei Kitaev put forth an exactly solvable model of S=1/2 spins on a honeycomb lattice [1]. The ground state of this model is a quantum spin liquid (QSL) exhibiting Majorana fermion excitations. Subsequently Jackeli and Khaliullin showed how the Kitaev Hamiltonian might actually be realized in the laboratory [2]. This stimulated a great deal of experimental activity, initially on.
Neutron scattering in the proximate quantum spin liquid α.
Our results uncover that 2D α-RuCl3 could harbour the unusual magnetic continuum, serving as a hallmark of the 2D proximate quantum spin liquid state and frustrated magnetic interactions. More importantly, our work demonstrates that the unusual magnetic scattering, as compared with bulk, is more obvious in 2D α-RuCl3, indicating that the.
Honeycomb‐Structure RuI3, A New Quantum Material Related to α‐RuCl3.
Having demystified the magnetic scattering and topological proximate QSL state in 2D α -RuCl 3, we focus on the temperature-driven evolution of magnetic continuum to inspect the layer dependent temperature that spin liquid correlations emerge. Figure 4 (a) shows the Raman intensity at low energy for 2 L, 3 L, 7 L and bulk.
Multiple spin-orbit excitons in α-RuCl3 from bulk to.
Gapless Spin Excitations in the Field-Induced Quantum Spin Liquid Phase of α-RuCl 3 Jiacheng Zheng,1,2 Kejing Ran,3 Tianrun Li,1 Jinghui Wang,3 Pengshuai Wang,1 Bin Liu,2 Zheng-Xin Liu,1 B. Normand,4 Jinsheng Wen,3,5,* and Weiqiang Yu1,6,† 1Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing.
(PDF) $\alpha$-RuCl3: a Spin-Orbit Assisted Mott Insulator on a.
The Kitaev quantum spin liquid (KQSL) is an exotic emergent state of matter exhibiting Majorana Fermion and gauge flux excitations. The magnetic insulator α-RuCl3 is thought to realize a proximate KQSL. Here, we use neutron scattering on single crystals of α- RuCl3 to reconstruct dynamical correlations in energy-momentum space. We discover. N2 - The layered honeycomb lattice material α-RuCl3 has emerged as a prime candidate for displaying the Kitaev quantum spin liquid state, and as such has attracted much research interest. Here a new layered honeycomb lattice polymorph of RuI3, a material that is strongly chemically and structurally related to α-RuCl3 is described. May 01, 2021 · The layered insulator α-RuCl3 orders as a zigzag antiferromagnet at low temperature in zero magnetic field4. The zigzag order is destroyed when a magnetic field is applied parallel to the zigzag axis. At moderate magnetic field strength, there is growing evidence that a quantum spin-liquid state exists.
Neutron scattering in the proximate quantum spin liquid -RuCl.
Polarization-resolved Raman spectroscopy was performed and analyzed from large, high-quality, monodomain single crystal of $\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{RuCl}}_{3}$, a proximate Kitaev quantum spin liquid. Spectra were collected with laser polarizations parallel and perpendicular to the honeycomb plane. Pairs of nearly degenerate phonons were discovered and show either a. Oct 22, 2020 · The insulating quantum magnet a-RuCl3 is the closest known proximate to the Kitaev hexagonal model. Below 7 K, it orders as an antiferromagnet with a zig-zag motif. Application of an in-plane magnetic field B||a destroys the magnetic order at 7.3 T. In the field interval 7.3 to 11.5 Tesla, neutron scattering results strongly suggest a quantum. The main aim of this review is to summarize experimental evidence obtained by THz spectroscopy and utilizing heat-capacity experiments, which point to the existence of fractionalized excitations in the spin-liquid state, which in -RuCl3 exists at temperatures just above the onset of magnetic order or at in-plane magnetic fields just beyond the.
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