- Robustness of the thermal Hall effect close to half-quantization in α.
- Spin-phonon interactions in Quantum Spin Liquid Candidate α-RuCl3.
- Deriving models for the Kitaev spin-liquid candidate material α-RuCl3.
- Experimental evidence of quantum spin liquid | ANSTO.
- Possible Kitaev spin liquid physics and topological.
- Anomalous Quantum Oscillations in a Heterostructure of Graphene on a.
- Oscillations of the thermal conductivity in the spin-liquid state of α.
- PDF Gapless Spin Excitations in the Field-Induced Quantum Spin Liquid Phase.
- Identification of magnetic interactions and high-field.
- Evidence of a Phonon Hall Effect in the Kitaev Spin Liquid Candidate α.
- Sample dependence of half-integer quantized thermal Hall effect in the.
- Fractional Magnetic Excitations and Kitaev physics in honeycomb α-RuCl3.
- PDF PHYSICAL REVIEW B100, 075110 (2019) - Oak Ridge National Laboratory.
- Scientists find evidence of exotic state of matter in candidate.
Robustness of the thermal Hall effect close to half-quantization in α.
Α-RuCl 3 is drawing much attention as a promising candidate for the Kitaev quantum spin liquid 1, 2, 3, 4, 5, 6, 7, 8. However, despite intensive research efforts, controversy remains about the. RuCl3 has been proposed to be a spin-orbit assisted Mott insulator close to the Kitaev-spin-liquid ground state, an exotic state of matter that could protect information in quantum computers. Recent STM experiments [M. Ziatdinov et al, Nature Communications (in press)] however, show the presence of a puzzling short-range charge order in this quasi two dimensional material. 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.
Spin-phonon interactions in Quantum Spin Liquid Candidate α-RuCl3.
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.
Deriving models for the Kitaev spin-liquid candidate material α-RuCl3.
For a candidate spin liquid α-RuCl3, we report low-energy spin excitations through nuclear magnetic and quadrupole resonance measurements down to temperatures three orders of magnitude lower than the exchange energy. In a field-driven disordered state, we found the evolution of two kinds of gapped spin excitations with distinct field dependences. Oscillations of the thermal conductivity in the spin-liquid phase of the honeycomb magnet a-RuCl3. The quantum spin-liquid (QSL) state is currently of intense interest because it exhibits novel excitations as well as wave-function entanglement. The layered insulator RuCl3 orders as a zigzag antiferromagnet below 7 K in zero magnetic field.
Experimental evidence of quantum spin liquid | ANSTO.
The bulk α-RuCl 3 has a magnetically ordered ground state that adjoins a proximate Kitaev spin-liquid phase. Although the zigzag magnetic order occurs at TN ≈ 7 K, there are thermodynamic and. We study spin-phonon interactions in quantum spin liquid candidate RuCl3 under magnetic fields of up to 6T and mK temperatures with polarization-resolved Raman spectroscopy.
Possible Kitaev spin liquid physics and topological.
The magnetic behaviour of alpha-RuCl3 is known to be very unusual, with excitations similar to those expected in the Kitaev quantum spin liquid - a much sought-after phase of matter that would have potential applications to quantum computing. (See below.) Despite explosive interest in this material, the magnetic Hamiltonian appropriate to. The Optical Society (OSA) Conference Date May 9, 2021 - May 14, 2021 View DOI Listing Abstract We study spin-phonon interactions in quantum spin liquid candidate RuCl3 under magnetic fields of up to 6T and mK temperatures with polarization-resolved Raman spectroscopy. Oct 14, 2019 · Polarization-resolved Raman spectroscopy was performed and analyzed from large, high quality, mono-domain single crystal of \alpha-RuCl3, a proximate Kitaev quantum spin liquid. Spectra were collected with laser polarizations parallel and perpendicular to the honeycomb plane.
Anomalous Quantum Oscillations in a Heterostructure of Graphene on a.
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. 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. Possible Kitaev spin liquid physics and topological transitions in a-RuCl 3. 2 SEN CNLS 2019... N 7 K the spin waves disappear throughout the Brillouin zone.
Oscillations of the thermal conductivity in the spin-liquid state of α.
Jan 12, 2022 · Pursuing the exotic quantum spin liquid (QSL) state in the Kitaev material $α$-RuCl$_3$ has intrigued great research interest recently. A fascinating question is on the possible existence of field-induced QSL phase in this compound. Here we perform a high-field measurement of the magnetization process of $α$-RuCl$_3$ up to 102 T employing the non-destructive and destructive pulsed magnets.
PDF Gapless Spin Excitations in the Field-Induced Quantum Spin Liquid Phase.
The fractional entropy and algebraic low-temperature specific heat unveil the nature of a gapless spin liquid, which can be explored in high-field measurements on α-RuCl3. The nature of spin.
Identification of magnetic interactions and high-field.
The Kitaev quantum spin liquid (KQSL) is an exotic emergent state of matter exhibiting Majorana fermion and gauge flux excitations. The magnetic insulator α-RuCl 3 is thought to realize a proximate KQSL. We used neutron scattering on single crystals of α-RuCl 3 to reconstruct dynamical correlations in energy-momentum space.
Evidence of a Phonon Hall Effect in the Kitaev Spin Liquid Candidate α.
The search for quantum spin liquid (QSL) physics has been long and storied, but alpha-RuCl3 and the iridates A2IrO3 have opened up the possibility of realizing a new family of "Kitaev" quantum spin liquids. The Kitaev honeycomb model is a highly anisotropic quadratic spin model that has an exact QSL ground state. We study the Kitaev model on a. The layered honeycomb lattice material α-RuCl 3 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 RuI 3, a material that is strongly chemically and structurally related to α-RuCl 3 is described.
Sample dependence of half-integer quantized thermal Hall effect in the.
Α -RuCl 3 is a promising candidate material to realize the so far elusive quantum spin liquid ground state. However, at low temperatures, the coexistence of different exchange interactions couple.
Fractional Magnetic Excitations and Kitaev physics in honeycomb α-RuCl3.
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. 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. Quantum spin liquids (QSL) are generally characterized by their long-range quantum entanglement, fractionalized excitations, and absence of ordinary magnetic order.. The quantum spin liquid state was first proposed by physicist Phil.
PDF PHYSICAL REVIEW B100, 075110 (2019) - Oak Ridge National Laboratory.
"Thermal Transport in the Spin-Liquid Phase of α-RuCl3 at Low Temperatures" with Prof. Nai Phuan Ong, Princeton UniversityPrinceton Summer School for Condens. The realization and discovery of quantum spin liquid candidate materials and associated phenomena lie at the intersection of solid-state chemistry, condensed matter physics, and materials science and engineering.... Enhancement of Photoresponse on Narrow-Bandgap Mott Insulator α-RuCl3 via Intercalation. ACS Nano 2021, 15 (11) , 18113-18124.
Scientists find evidence of exotic state of matter in candidate.
Recently, α-RuCl3 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-RuCl3 have been. Multiple spin-orbit excitons in α-RuCl3 from bulk to atomically thin layers. The van der Waals Kitaev magnet α-RuCl 3 has recently garnered considerable attention due to its possible realization of topological spin liquids. Combining Raman spectroscopy with numerical calculations, we report here the thickness dependence of electronic.
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