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Title: The range of non-Kitaev terms and fractional particles in α-RuCl3

Abstract

AbstractSignificant efforts have focused on the magnetic excitations of relativistic Mott insulators, predicted to realize the Kitaev quantum spin liquid (QSL). This exactly solvable model involves a highly entangled state resulting from bond-dependent Ising interactions that produce excitations which are non-local in terms of spin flips. A key challenge in real materials is identifying the relative size of the non-Kitaev terms and their role in the emergence or suppression of fractional excitations. Here, we identify the energy and temperature boundaries of non-Kitaev interactions by direct comparison of the Raman susceptibility of α-RuCl3 with quantum Monte Carlo (QMC) results for the Kitaev QSL. Moreover, we further confirm the fractional nature of the magnetic excitations, which is given by creating a pair of fermionic quasiparticles. Interestingly, this fermionic response remains valid in the non-Kitaev range. Our results and focus on the use of the Raman susceptibility provide a stringent new test for future theoretical and experimental studies of QSLs.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4];  [5]; ORCiD logo [5];  [6];  [7];  [7];  [8]; ORCiD logo [9]; ORCiD logo [4];  [4];  [1]
  1. Boston College, Chestnut Hill, MA (United States)
  2. SICK Product Center Asia Pte. Ltd. (Singapore)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Univ. of Massachusetts, Amherst, MA (United States)
  6. Imperial College, London (United Kingdom)
  7. Princeton Univ., NJ (United States)
  8. Yokohama National Univ. (Japan)
  9. Univ. of Tokyo (Japan)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Boston College, Chestnut Hill, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
OSTI Identifier:
1606655
Alternate Identifier(s):
OSTI ID: 1780971
Grant/Contract Number:  
AC05-00OR22725; SC0018675
Resource Type:
Accepted Manuscript
Journal Name:
npj Quantum Materials
Additional Journal Information:
Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2397-4648
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Condensed-matter physics; Magnetic properties and materials

Citation Formats

Wang, Yiping, Osterhoudt, Gavin, Tian, Yao, Lampen-Kelley, Paige, Banerjee, Arnab, Goldstein, Thomas, Yan, Jun, Knolle, Johannes, Ji, Huiwen, Cava, Robert, Nasu, Joji, Motome, Yukitoshi, Nagler, Stephen E., Mandrus, David, and Burch, Kenneth S. The range of non-Kitaev terms and fractional particles in α-RuCl3. United States: N. p., 2020. Web. doi:10.1038/s41535-020-0216-6.
Wang, Yiping, Osterhoudt, Gavin, Tian, Yao, Lampen-Kelley, Paige, Banerjee, Arnab, Goldstein, Thomas, Yan, Jun, Knolle, Johannes, Ji, Huiwen, Cava, Robert, Nasu, Joji, Motome, Yukitoshi, Nagler, Stephen E., Mandrus, David, & Burch, Kenneth S. The range of non-Kitaev terms and fractional particles in α-RuCl3. United States. doi:https://doi.org/10.1038/s41535-020-0216-6
Wang, Yiping, Osterhoudt, Gavin, Tian, Yao, Lampen-Kelley, Paige, Banerjee, Arnab, Goldstein, Thomas, Yan, Jun, Knolle, Johannes, Ji, Huiwen, Cava, Robert, Nasu, Joji, Motome, Yukitoshi, Nagler, Stephen E., Mandrus, David, and Burch, Kenneth S. Wed . "The range of non-Kitaev terms and fractional particles in α-RuCl3". United States. doi:https://doi.org/10.1038/s41535-020-0216-6. https://www.osti.gov/servlets/purl/1606655.
@article{osti_1606655,
title = {The range of non-Kitaev terms and fractional particles in α-RuCl3},
author = {Wang, Yiping and Osterhoudt, Gavin and Tian, Yao and Lampen-Kelley, Paige and Banerjee, Arnab and Goldstein, Thomas and Yan, Jun and Knolle, Johannes and Ji, Huiwen and Cava, Robert and Nasu, Joji and Motome, Yukitoshi and Nagler, Stephen E. and Mandrus, David and Burch, Kenneth S.},
abstractNote = {AbstractSignificant efforts have focused on the magnetic excitations of relativistic Mott insulators, predicted to realize the Kitaev quantum spin liquid (QSL). This exactly solvable model involves a highly entangled state resulting from bond-dependent Ising interactions that produce excitations which are non-local in terms of spin flips. A key challenge in real materials is identifying the relative size of the non-Kitaev terms and their role in the emergence or suppression of fractional excitations. Here, we identify the energy and temperature boundaries of non-Kitaev interactions by direct comparison of the Raman susceptibility of α-RuCl3 with quantum Monte Carlo (QMC) results for the Kitaev QSL. Moreover, we further confirm the fractional nature of the magnetic excitations, which is given by creating a pair of fermionic quasiparticles. Interestingly, this fermionic response remains valid in the non-Kitaev range. Our results and focus on the use of the Raman susceptibility provide a stringent new test for future theoretical and experimental studies of QSLs.},
doi = {10.1038/s41535-020-0216-6},
journal = {npj Quantum Materials},
number = 1,
volume = 5,
place = {United States},
year = {2020},
month = {3}
}

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Works referenced in this record:

Optical probe of Heisenberg-Kitaev magnetism in α RuCl 3
journal, November 2016


Breakdown of magnons in a strongly spin-orbital coupled magnet
journal, October 2017


Spin-orbit physics of j = 1 2 Mott insulators on the triangular lattice
journal, April 2015


Dynamics of a Two-Dimensional Quantum Spin Liquid: Signatures of Emergent Majorana Fermions and Fluxes
journal, May 2014


Kondo Impurities in the Kitaev Spin Liquid: Numerical Renormalization Group Solution and Gauge-Flux-Driven Screening
journal, July 2016


Spin fluctuations in CuGeO 3 probed by light scattering
journal, January 1997

  • Kuroe, Haruhiko; Sasaki, Jun-ichi; Sekine, Tomoyuki
  • Physical Review B, Vol. 55, Issue 1
  • DOI: 10.1103/PhysRevB.55.409

Compass models: Theory and physical motivations
journal, January 2015


Observation of two types of fractional excitation in the Kitaev honeycomb magnet
journal, May 2018


Two-Magnon Raman Scattering and Pseudospin-Lattice Interactions in Sr 2 IrO 4 and Sr 3 Ir 2 O 7
journal, March 2016


Quantum spin liquids: a review
journal, November 2016


Na 2 IrO 3 as a Novel Relativistic Mott Insulator with a 340-meV Gap
journal, December 2012


Interplay of thermal and quantum spin fluctuations in the kagome lattice compound herbertsmithite
journal, October 2010


Spin-Liquid Ground State of the S = 1/2 Kagome Heisenberg Antiferromagnet
journal, April 2011


Entanglement in 3D Kitaev spin liquids
journal, June 2018

  • Matern, S.; Hermanns, M.
  • Journal of Statistical Mechanics: Theory and Experiment, Vol. 2018, Issue 6
  • DOI: 10.1088/1742-5468/aac12c

Probing α RuCl 3 Beyond Magnetic Order: Effects of Temperature and Magnetic Field
journal, February 2018


Gapless Spin Excitations in the Field-Induced Quantum Spin Liquid Phase of α RuCl 3
journal, December 2017


Fractionalized Fermi liquids and exotic superconductivity in the Kitaev-Kondo lattice
journal, February 2018


Possible structural transformation and enhanced magnetic fluctuations in exfoliated α-RuCl3
journal, May 2019

  • Zhou, Boyi; Wang, Yiping; Osterhoudt, Gavin B.
  • Journal of Physics and Chemistry of Solids, Vol. 128
  • DOI: 10.1016/j.jpcs.2018.01.026

Anisotropic Ru 3 +   4 d 5 magnetism in the α RuCl 3 honeycomb system: Susceptibility, specific heat, and zero-field NMR
journal, May 2015


Scattering Continuum and Possible Fractionalized Excitations in α RuCl 3
journal, April 2015


Vaporization of Kitaev Spin Liquids
journal, November 2014


Breakdown of Magnetic Order in the Pressurized Kitaev Iridate β Li 2 IrO 3
journal, June 2018


A spin–orbital-entangled quantum liquid on a honeycomb lattice
journal, February 2018

  • Kitagawa, K.; Takayama, T.; Matsumoto, Y.
  • Nature, Vol. 554, Issue 7692
  • DOI: 10.1038/nature25482

α RuCl 3 : A spin-orbit assisted Mott insulator on a honeycomb lattice
journal, July 2014


Antiferromagnetic Resonance and Terahertz Continuum in α RuCl 3
journal, November 2017


Magnetic Excitations and Continuum of a Possibly Field-Induced Quantum Spin Liquid in α RuCl 3
journal, November 2017


Kitaev exchange and field-induced quantum spin-liquid states in honeycomb α-RuCl3
journal, November 2016

  • Yadav, Ravi; Bogdanov, Nikolay A.; Katukuri, Vamshi M.
  • Scientific Reports, Vol. 6, Issue 1
  • DOI: 10.1038/srep37925

Raman-scattering evidence for free spinons in the one-dimensional spin-½ chains of Sr 2 Cu O 3 and SrCu O 2
journal, June 1996


Inelastic light scattering from correlated electrons
journal, January 2007


Crystal structure and magnetism in α RuCl 3 : An ab initio study
journal, April 2016


Kitaev-Heisenberg Model on a Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides A 2 IrO 3
journal, July 2010


Magneto-elastic coupling in a potential ferromagnetic 2D atomic crystal
journal, June 2016


Realization of a three-dimensional spin–anisotropic harmonic honeycomb iridate
journal, June 2014

  • Modic, K. A.; Smidt, Tess E.; Kimchi, Itamar
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms5203

Scattering of Light by One- and Two-Magnon Excitations
journal, February 1968


Raman Scattering Signatures of Kitaev Spin Liquids in A 2 IrO 3 Iridates with A = Na or Li
journal, October 2014


Thermal conductivity of suspended pristine graphene measured by Raman spectroscopy
journal, February 2011


An End to the Drought of Quantum Spin Liquids
journal, September 2008


Fluctuation-dissipation theorems for driven non-linear media at optical frequencies
journal, October 1965


Low-temperature crystal and magnetic structure of α RuCl 3
journal, April 2016


Magnetic properties of some iron(III) and ruthenium(III) low-spin complexes
journal, January 1966

  • Figgis, B. N.; Lewis, J.; Mabbs, F. E.
  • Journal of the Chemical Society A: Inorganic, Physical, Theoretical
  • DOI: 10.1039/j19660000422

Automatic Spike Removal Algorithm for Raman Spectra
journal, October 2016


Proximate Kitaev quantum spin liquid behaviour in a honeycomb magnet
journal, April 2016

  • Banerjee, A.; Bridges, C. A.; Yan, J. -Q.
  • Nature Materials, Vol. 15, Issue 7
  • DOI: 10.1038/nmat4604

Anyons in an exactly solved model and beyond
journal, January 2006


Path to stable quantum spin liquids in spin-orbit coupled correlated materials
journal, April 2018


Fermionic response from fractionalization in an insulating two-dimensional magnet
journal, July 2016

  • Nasu, J.; Knolle, J.; Kovrizhin, D. L.
  • Nature Physics, Vol. 12, Issue 10
  • DOI: 10.1038/nphys3809

Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3
journal, January 2019


Unusual Thermal Hall Effect in a Kitaev Spin Liquid Candidate α RuCl 3
journal, May 2018


Cu 2 IrO 3 : A New Magnetically Frustrated Honeycomb Iridate
journal, October 2017

  • Abramchuk, Mykola; Ozsoy-Keskinbora, Cigdem; Krizan, Jason W.
  • Journal of the American Chemical Society, Vol. 139, Issue 43
  • DOI: 10.1021/jacs.7b06911

Neutron scattering in the proximate quantum spin liquid α-RuCl 3
journal, June 2017


Signatures of low-energy fractionalized excitations in α RuCl 3 from field-dependent microwave absorption
journal, November 2018


Magnetic thermal conductivity far above the Néel temperature in the Kitaev-magnet candidate α RuCl 3
journal, June 2017


Electrical Transport Signature of the Magnetic Fluctuation-Structure Relation in α-RuCl 3 Nanoflakes
journal, April 2018


Majorana quantization and half-integer thermal quantum Hall effect in a Kitaev spin liquid
journal, July 2018


Majorana fermions in the Kitaev quantum spin system α-RuCl3
journal, September 2017

  • Do, Seung-Hwan; Park, Sang-Youn; Yoshitake, Junki
  • Nature Physics, Vol. 13, Issue 11
  • DOI: 10.1038/nphys4264

Relation between Kitaev magnetism and structure in α RuCl 3
journal, May 2017


Anomalous Thermal Conductivity and Magnetic Torque Response in the Honeycomb Magnet α RuCl 3
journal, May 2017


Fractionalized excitations in the spin-liquid state of a kagome-lattice antiferromagnet
journal, December 2012

  • Han, Tian-Heng; Helton, Joel S.; Chu, Shaoyan
  • Nature, Vol. 492, Issue 7429
  • DOI: 10.1038/nature11659

Antiferromagnetic Mott insulating state in single crystals of the honeycomb lattice material Na 2 IrO 3
journal, August 2010


Magnetism in two-dimensional van der Waals materials
journal, October 2018


Quantum spin liquid at finite temperature: Proximate dynamics and persistent typicality
journal, July 2019


Angle-resolved photoemission study of the Kitaev candidate α RuCl 3
journal, October 2016


Light scattering from energy fluctuations in magnetic insulators
journal, January 1976


Study of Magnetic Excitation in Pd(dmit) 2 Salts by Raman Scattering Spectroscopy
journal, April 2015

  • Nakamura, Yuto; Kato, Reizo; Kishida, Hideo
  • Journal of the Physical Society of Japan, Vol. 84, Issue 4
  • DOI: 10.7566/JPSJ.84.044715

Spin-orbit excitations and electronic structure of the putative Kitaev magnet α RuCl 3
journal, February 2016


Field evolution of magnons in α RuCl 3 by high-resolution polarized terahertz spectroscopy
journal, September 2018


Colloquium : Zoo of quantum-topological phases of matter
journal, December 2017


Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
journal, January 2009


J eff Description of the Honeycomb Mott Insulator α RuCl 3
journal, September 2016


Low vibration high numerical aperture automated variable temperature Raman microscope
journal, April 2016

  • Tian, Yao; Reijnders, Anjan A.; Osterhoudt, Gavin B.
  • Review of Scientific Instruments, Vol. 87, Issue 4
  • DOI: 10.1063/1.4944559

Thermal fractionalization of quantum spins in a Kitaev model: Temperature-linear specific heat and coherent transport of Majorana fermions
journal, September 2015


A ferromagnetic insulating substrate for the epitaxial growth of topological insulators
journal, September 2013

  • Ji, Huiwen; Stokes, R. A.; Alegria, L. D.
  • Journal of Applied Physics, Vol. 114, Issue 11
  • DOI: 10.1063/1.4822092