Evidence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate

Shen, Yao; Li, Yao-Dong; Wo, Hongliang; Li, Yuesheng; Shen, Shoudong; Pan, Bingying; Wang, Qisi; Walker, H. C.; Steffens, P.; Boehm, M.; Hao, Yiqing; Quintero-Castro, D. L.; Harriger, L. W.; Frontzek, M. D.; Hao, Lijie; Meng, Siqin; Zhang, Qingming; Chen, Gang; Zhao, Jun

doi:10.1038/nature20614

Title: Evidence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate

Abstract

A quantum spin liquid is an exotic quantum state of matter in which spins are highly entangled and remain disordered down to zero temperature. Such a state of matter is potentially relevant to high-temperature superconductivity and quantum-information applications, and experimental identification of a quantum spin liquid state is of fundamental importance for our understanding of quantum matter. Theoretical studies have proposed various quantum-spin-liquid ground states, most of which are characterized by exotic spin excitations with fractional quantum numbers (termed ‘spinons’). In this paper, we report neutron scattering measurements of the triangular-lattice antiferromagnet YbMgGaO₄ that reveal broad spin excitations covering a wide region of the Brillouin zone. The observed diffusive spin excitation persists at the lowest measured energy and shows a clear upper excitation edge, consistent with the particle–hole excitation of a spinon Fermi surface. Finally, our results therefore point to the existence of a quantum spin liquid state with a spinon Fermi surface in YbMgGaO₄, which has a perfect spin-1/2 triangular lattice as in the original proposal of quantum spin liquids.

Authors:

Shen, Yao ^[1]; Li, Yao-Dong ^[1]; Wo, Hongliang ^[1]; Li, Yuesheng ^[2]; Shen, Shoudong ^[1]; Pan, Bingying ^[1]; Wang, Qisi ^[1]; Walker, H. C. ^[3]; Steffens, P. ^[4]; Boehm, M. ^[4]; Hao, Yiqing ^[1]; Quintero-Castro, D. L. ^[5]; Harriger, L. W. ^[6]; Frontzek, M. D. ^[7]; Hao, Lijie ^[8]; Meng, Siqin ^[8]; Zhang, Qingming ^[2]; Chen, Gang ^[1]; Zhao, Jun ^[1]

Fudan Univ., Shanghai (China)
Renmin Univ. of China, Beijing (China)
Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab., ISIS Neutron Source
Inst. Laue-Langevin (ILL), Grenoble (France)
Helmholtz-Zentrum Berlin (HZB), (Germany). German Research Centre for Materials and Energy
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
China Inst. of Atomic Energy (CIAE), Beijing (China)

Publication Date:: Mon Dec 05 00:00:00 EST 2016

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Fudan Univ., Shanghai (China)

Sponsoring Org.:: USDOE Office of Science (SC); National Key R&D Program of the MOST (China); Ministry of Science and Technology (China); National Natural Science Foundation of China (NSFC)

Contributing Org.:: Helmholtz-Zentrum Berlin for Materials and Energy, Berlin (Germany); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); China Inst. of Atomic Energy (CIAE), Beijing (China); Renmin Univ. of China, Beijing (China); Shanghai Jiao Tong Univ. (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China); Inst. Laue-Langevin, Grenoble (France); Science and Technology Facilities Council (STFC), Chilton (United Kingdom)

OSTI Identifier:: 1335366

Grant/Contract Number:: AC05-00OR22725; 2016YFA0300203; 2015CB921302; 91421106; 2016YFA0300504

Resource Type:: Accepted Manuscript

Journal Name:: Nature (London)

Additional Journal Information:: Journal Name: Nature (London); Journal Volume: 540; Journal ID: ISSN 0028-0836

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Shen, Yao, Li, Yao-Dong, Wo, Hongliang, Li, Yuesheng, Shen, Shoudong, Pan, Bingying, Wang, Qisi, Walker, H. C., Steffens, P., Boehm, M., Hao, Yiqing, Quintero-Castro, D. L., Harriger, L. W., Frontzek, M. D., Hao, Lijie, Meng, Siqin, Zhang, Qingming, Chen, Gang, and Zhao, Jun. Evidence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate.  United States: N. p., 2016. 
Web.  doi:10.1038/nature20614.

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                    Shen, Yao, Li, Yao-Dong, Wo, Hongliang, Li, Yuesheng, Shen, Shoudong, Pan, Bingying, Wang, Qisi, Walker, H. C., Steffens, P., Boehm, M., Hao, Yiqing, Quintero-Castro, D. L., Harriger, L. W., Frontzek, M. D., Hao, Lijie, Meng, Siqin, Zhang, Qingming, Chen, Gang, & Zhao, Jun. Evidence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate.  United States.  https://doi.org/10.1038/nature20614

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                    Shen, Yao, Li, Yao-Dong, Wo, Hongliang, Li, Yuesheng, Shen, Shoudong, Pan, Bingying, Wang, Qisi, Walker, H. C., Steffens, P., Boehm, M., Hao, Yiqing, Quintero-Castro, D. L., Harriger, L. W., Frontzek, M. D., Hao, Lijie, Meng, Siqin, Zhang, Qingming, Chen, Gang, and Zhao, Jun. Mon .  
"Evidence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate".  United States.  https://doi.org/10.1038/nature20614.  https://www.osti.gov/servlets/purl/1335366.

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@article{osti_1335366,

  title        = {Evidence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate},

  author       = {Shen, Yao and Li, Yao-Dong and Wo, Hongliang and Li, Yuesheng and Shen, Shoudong and Pan, Bingying and Wang, Qisi and Walker, H. C. and Steffens, P. and Boehm, M. and Hao, Yiqing and Quintero-Castro, D. L. and Harriger, L. W. and Frontzek, M. D. and Hao, Lijie and Meng, Siqin and Zhang, Qingming and Chen, Gang and Zhao, Jun},

  abstractNote = {A quantum spin liquid is an exotic quantum state of matter in which spins are highly entangled and remain disordered down to zero temperature. Such a state of matter is potentially relevant to high-temperature superconductivity and quantum-information applications, and experimental identification of a quantum spin liquid state is of fundamental importance for our understanding of quantum matter. Theoretical studies have proposed various quantum-spin-liquid ground states, most of which are characterized by exotic spin excitations with fractional quantum numbers (termed ‘spinons’). In this paper, we report neutron scattering measurements of the triangular-lattice antiferromagnet YbMgGaO4 that reveal broad spin excitations covering a wide region of the Brillouin zone. The observed diffusive spin excitation persists at the lowest measured energy and shows a clear upper excitation edge, consistent with the particle–hole excitation of a spinon Fermi surface. Finally, our results therefore point to the existence of a quantum spin liquid state with a spinon Fermi surface in YbMgGaO4, which has a perfect spin-1/2 triangular lattice as in the original proposal of quantum spin liquids.},

  doi          = {10.1038/nature20614},

  journal      = {Nature (London)},

  number       = ,

  volume       = 540,

  place        = {United States},

  year         = {Mon Dec 05 00:00:00 EST 2016},

  month        = {Mon Dec 05 00:00:00 EST 2016}

}

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Kitaev materials beyond iridates: order by quantum disorder and Weyl magnons in rare-earth double perovskites
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DOI: 10.48550/arxiv.1607.05618

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Klanjsek, Martin; Zorko, Andrej; Zitko, Rok
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DOI: 10.48550/arxiv.1704.06450

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DOI: 10.48550/arxiv.1708.07856

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DOI: 10.48550/arxiv.1806.10967

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DOI: 10.48550/arxiv.1810.05054

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DOI: 10.48550/arxiv.1811.05983

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DOI: 10.48550/arxiv.1901.10092

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DOI: 10.48550/arxiv.1902.06407

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DOI: 10.48550/arxiv.1905.07040

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DOI: 10.48550/arxiv.1905.11420

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DOI: 10.48550/arxiv.1907.06176

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DOI: 10.48550/arxiv.2003.03321

Quantum-disordered state of magnetic and electric dipoles in an organic Mott system
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DOI: 10.1038/s41467-017-02679-7

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DOI: 10.1038/s41467-019-12410-3

Kosterlitz-Thouless Melting of Magnetic Order in the Triangular Quantum Ising Material TmMgGaO$_4$
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DOI: 10.48550/arxiv.1907.08173

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text, January 2020

Ferreira, Timothy; Xing, Jie; Sanjeewa, Liurukara D.
arXiv
DOI: 10.48550/arxiv.2003.03321

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Title: Evidence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate

Abstract

Citation Formats

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journal, November 2013

Filling constraints for spin-orbit coupled insulators in symmorphic and nonsymmorphic crystals
journal, November 2015

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journal, February 2007

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journal, March 2010

Commensurability, Excitation Gap, and Topology in Quantum Many-Particle Systems on a Periodic Lattice
journal, February 2000

Neutron Scattering Measurements of Spatially Anisotropic Magnetic Exchange Interactions in Semiconducting $K_{0.85} {Fe}_{1.54} {Se}_{2}$ ( $T_{N} = 280 K$ )
journal, April 2014

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journal, July 2016

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journal, July 2005

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journal, August 2008

Quantum orders and symmetric spin liquids
journal, April 2002

Topological excitations and the dynamic structure factor of spin liquids on the kagome lattice
journal, March 2014

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journal, March 2007

Cooper pairing in non-Fermi liquids
journal, March 2015

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journal, November 2015

Recent advances in magnetic structure determination by neutron powder diffraction
journal, October 1993

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journal, October 2015

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journal, March 2004

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journal, October 2005

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journal, March 2008

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

Resonating valence bonds: A new kind of insulator?
journal, February 1973

Extended scattering continua characteristic of spin fractionalization in the two-dimensional frustrated quantum magnet ${Cs}_{2} {CuCl}_{4}$ observed by neutron scattering
journal, October 2003

Kagome´- and triangular-lattice Heisenberg antiferromagnets: Ordering from quantum fluctuations and quantum-disordered ground states with unconfined bosonic spinons
journal, June 1992

Magnetic ground state of FeSe
journal, July 2016

Two soluble models of an antiferromagnetic chain
journal, December 1961

Low-energy effective theory of Fermi surface coupled with U(1) gauge field in $2 + 1$ dimensions
journal, October 2009

The Resonating Valence Bond State in La2CuO4 and Superconductivity
journal, March 1987

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

Spin Liquid State in an Organic Mott Insulator with a Triangular Lattice
journal, September 2003

Topology of the resonating valence-bond state: Solitons and high- $T_{c}$ superconductivity
journal, June 1987

U(1) Gauge Theory of the Hubbard Model: Spin Liquid States and Possible Application to $κ − (BEDT − TTF)_{2} {Cu}_{2} (CN)_{3}$
journal, July 2005

Continuous excitations of the triangular-lattice quantum spin liquid YbMgGaO4
journal, December 2016

Magnetic ground state of FeSe
text, January 2015

Continuous excitations of the triangular-lattice quantum spin liquid YbMgGaO4
text, January 2016

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journal, September 1992

YbMgGaO ₄ : A Triangular‐Lattice Quantum Spin Liquid Candidate
journal, October 2019

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journal, June 2017

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journal, July 2017

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journal, January 2018

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journal, April 2018

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journal, October 2018

Intertwined dipolar and multipolar order in the triangular-lattice magnet TmMgGaO4
journal, October 2019

Experimental identification of quantum spin liquids
journal, April 2019

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journal, April 2018

Experimental signatures of a three-dimensional quantum spin liquid in effective spin-1/2 Ce2Zr2O7 pyrochlore
journal, July 2019

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journal, July 2019

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journal, February 2019

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journal, January 2017

REZnAl ₁₁ O ₁₉ (RE = Pr, Nd, Sm–Tb): a new family of ideal 2D triangular lattice frustrated magnets
journal, January 2019

Strong quantum fluctuations in a quantum spin liquid candidate with a Co-based triangular lattice
journal, July 2019

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journal, July 2018

Rare-Earth Chalcogenides: A Large Family of Triangular Lattice Spin Liquid Candidates
journal, October 2018

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journal, September 2019

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journal, July 2019

Magnetic field-dependent low-energy magnon dynamics in $α - {RuCl}_{3}$
journal, August 2019

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journal, October 2019

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journal, October 2019

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journal, October 2019

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journal, December 2019

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journal, December 2019

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journal, January 2020

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journal, January 2020

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journal, February 2017

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journal, April 2017

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journal, August 2017

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journal, August 2017

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journal, November 2017

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journal, August 2018

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journal, November 2018

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journal, December 2018

Kagome bands disguised in a coloring-triangle lattice
journal, March 2019

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journal, May 2019

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journal, June 2019

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journal, March 2017

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journal, September 2017

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journal, February 2018

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