Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate CsYbSe2

Xing, Jie; Sanjeewa, Liurukara D.; Kim, Jungsoo; Stewart, G. R.; Podlesnyak, Andrey A.; Sefat, Athena Safa

doi:10.1103/PhysRevB.100.220407

Title: Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate ${CsYbSe}_{2}$

Abstract

Two-dimensional triangular-lattice materials with spin-1/2 are perfect platforms for investigating quantum frustrated physics with spin fluctuations. Here we report the structure, magnetization, heat capacity, and inelastic neutron scattering (INS) results on cesium ytterbium diselenide, CsYbSe₂. There is no long-range magnetic order down to 0.4 K at zero field. The temperature-dependent magnetization, M(T), reveals an easy-plane magnetic anisotropy. A maximum is found in M(T) around T≈1.5 K when magnetic field H is applied in the ab plane, indicating the short-range interaction. The low-temperature isothermal magnetization M(H) shows a one-third plateau of the estimated saturation moment, which is characteristic of a two-dimensional (2D) frustrated triangular lattice. Heat capacity shows field-induced long-range magnetic order for both H||c and H||ab directions. Here, the broad peak in heat capacity and highly damped INS magnetic excitation at T=2 K suggests strong spin fluctuations. The dispersive in-plane INS, centered at the (1/3 1/3 0) point, and the absence of dispersion along the c direction suggest 120° noncollinear 2D-like spin correlations. All these results indicate that the two-dimensional frustrated material CsYbSe₂ can be in proximity to the triangular-lattice quantum spin liquid. We propose an experimental low-temperature H–T phase diagram for CsYbSe₂.

Authors:

Xing, Jie ^[1];

^[1]; Kim, Jungsoo ^[2]; Stewart, G. R. ^[2];

^[1];

^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Florida, Gainesville, FL (United States)

Publication Date:: 2019-12-16

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1606711

Grant/Contract Number:: AC05-00OR22725; FG02-86ER45268

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 100; Journal Issue: 22; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; magnetism; spin liquid; inelastic neutron scattering; magnetization measurements; specific heat measurements

Citation Formats


                    Xing, Jie, Sanjeewa, Liurukara D., Kim, Jungsoo, Stewart, G. R., Podlesnyak, Andrey A., and Sefat, Athena Safa. Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate CsYbSe2.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevB.100.220407.

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                    Xing, Jie, Sanjeewa, Liurukara D., Kim, Jungsoo, Stewart, G. R., Podlesnyak, Andrey A., & Sefat, Athena Safa. Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate CsYbSe2.  United States.  https://doi.org/10.1103/PhysRevB.100.220407

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                    Xing, Jie, Sanjeewa, Liurukara D., Kim, Jungsoo, Stewart, G. R., Podlesnyak, Andrey A., and Sefat, Athena Safa. Mon .  
"Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate CsYbSe2".  United States.  https://doi.org/10.1103/PhysRevB.100.220407.  https://www.osti.gov/servlets/purl/1606711.

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@article{osti_1606711,

  title        = {Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate CsYbSe2},

  author       = {Xing, Jie and Sanjeewa, Liurukara D. and Kim, Jungsoo and Stewart, G. R. and Podlesnyak, Andrey A. and Sefat, Athena Safa},

  abstractNote = {Two-dimensional triangular-lattice materials with spin-1/2 are perfect platforms for investigating quantum frustrated physics with spin fluctuations. Here we report the structure, magnetization, heat capacity, and inelastic neutron scattering (INS) results on cesium ytterbium diselenide, CsYbSe2. There is no long-range magnetic order down to 0.4 K at zero field. The temperature-dependent magnetization, M(T), reveals an easy-plane magnetic anisotropy. A maximum is found in M(T) around T≈1.5 K when magnetic field H is applied in the ab plane, indicating the short-range interaction. The low-temperature isothermal magnetization M(H) shows a one-third plateau of the estimated saturation moment, which is characteristic of a two-dimensional (2D) frustrated triangular lattice. Heat capacity shows field-induced long-range magnetic order for both H||c and H||ab directions. Here, the broad peak in heat capacity and highly damped INS magnetic excitation at T=2 K suggests strong spin fluctuations. The dispersive in-plane INS, centered at the (1/3 1/3 0) point, and the absence of dispersion along the c direction suggest 120° noncollinear 2D-like spin correlations. All these results indicate that the two-dimensional frustrated material CsYbSe2 can be in proximity to the triangular-lattice quantum spin liquid. We propose an experimental low-temperature H–T phase diagram for CsYbSe2.},

  doi          = {10.1103/PhysRevB.100.220407},

  journal      = {Physical Review B},

  number       = 22,

  volume       = 100,

  place        = {United States},

  year         = {2019},

  month        = {12}

}

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Title: Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate CsYbSe 2

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

Specific heat of quantum Heisenberg model on a triangular lattice with two exchange parameters and its application to He 3 adsorbed on graphite journal, June 1992

Valence Bonds in Random Quantum Magnets: Theory and Application to YbMgGaO 4 journal, July 2018

Synthesis, magnetization, and heat capacity of triangular lattice materials NaErSe 2 and KErSe 2 journal, November 2019

The new cold neutron chopper spectrometer at the Spallation Neutron Source: Design and performance journal, August 2011

The cold neutron chopper spectrometer at the Spallation Neutron Source—A review of the first 8 years of operation journal, September 2016

Horace : Software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments journal, October 2016

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

Single-site magnetic anisotropy governed by interlayer cation charge imbalance in triangular-lattice A Yb X 2 journal, November 2019

Field-induced incommensurate ordering in Heisenberg chains coupled by Ising interaction: Model for ytterbium aluminum perovskite YbAlO 3 journal, June 2019

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

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

Spin liquids in frustrated magnets journal, March 2010

Topography of Spin Liquids on a Triangular Lattice journal, May 2018

Disorder-Induced Mimicry of a Spin Liquid in YbMgGaO 4 journal, October 2017

Simple Variational Wave Functions for Two-Dimensional Heisenberg Spin-½ Antiferromagnets journal, June 1988

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

Fractionalized excitations in the partially magnetized spin liquid candidate YbMgGaO4 journal, October 2018

Field-induced instability of the quantum spin liquid ground state in the J eff = 1 2 triangular-lattice compound NaYbO 2 journal, May 2019

Novel Strongly Spin-Orbit Coupled Quantum Dimer Magnet: Yb 2 Si 2 O 7 journal, July 2019

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

Hyperhoneycomb Iridate β − Li 2 IrO 3 as a Platform for Kitaev Magnetism journal, February 2015

Gapless quantum spin liquid ground state in the two-dimensional spin-1/2 triangular antiferromagnet YbMgGaO4 journal, November 2015

Quantum theory of an antiferromagnet on a triangular lattice in a magnetic field journal, January 1991

Structure of the magnetic excitations in the spin-1/2 triangular-lattice Heisenberg antiferromagnet Ba3CoSb2O9 journal, August 2017

Relevance of the Heisenberg-Kitaev Model for the Honeycomb Lattice Iridates A 2 IrO 3 journal, March 2012

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

Rare-Earth Triangular Lattice Spin Liquid: A Single-Crystal Study of YbMgGaO 4 journal, October 2015

Specific Heat and Magnetic Susceptibility of Ising-Like Anisotropic Heisenberg Model on Kagome Lattice journal, August 2011

Magnetization plateau in the frustrated quantum spin system Cs 2 CuBr 4 journal, March 2003

Field-induced lattice staircase in a frustrated antiferromagnet Cu Fe O 2 journal, November 2006

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

Quantum spin liquid in the spin- 1 ∕ 2 triangular antiferromagnet Et Me 3 Sb [ Pd ( dmit ) 2 ] 2 journal, March 2008

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

Direct evidence of a zigzag spin-chain structure in the honeycomb lattice: A neutron and x-ray diffraction investigation of single-crystal Na 2 IrO 3 journal, May 2012

Two-Dimensional Kagome Correlations and Field Induced Order in the Ferromagnetic X Y Pyrochlore Yb 2 Ti 2 O 7 journal, November 2009

Tomonaga–Luttinger liquid behavior and spinon confinement in YbAlO3 journal, February 2019

Magnetic phase diagram of Ba 3 CoSb 2 O 9 as determined by ultrasound velocity measurements journal, July 2015

Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet YbMgGaO 4 journal, August 2016

Hierarchy of Exchange Interactions in the Triangular-Lattice Spin Liquid YbMgGaO 4 journal, July 2018

Na 2 IrO 3 as a Molecular Orbital Crystal journal, November 2012

Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3 journal, May 2015

Gapless spin-liquid state in the structurally disorder-free triangular antiferromagnet NaYbO 2 journal, October 2019

Spin-Wave Excitations Evidencing the Kitaev Interaction in Single Crystalline α − RuCl 3 journal, March 2017

Na2IrO3 as a molecular orbital crystal text, January 2012

Quantum Phase Diagram of the Triangular-Lattice XXZ Model in a Magnetic Field text, January 2013

HORACE: software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments text, January 2016

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

Hierarchy of exchange interactions in the triangular-lattice spin-liquid YbMgGaO$_{4}$ text, January 2017

Title: Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate ${CsYbSe}_{2}$

Quantum Phase Diagram of the Triangular-Lattice $X X Z$ Model in a Magnetic Field
journal, March 2014

Mantid—Data analysis and visualization package for neutron scattering and $μ$ SR experiments
journal, November 2014

Geometrical frustration
journal, February 2006

${NaYbS}_{2}$ : A planar spin- $\frac{1}{2}$ triangular-lattice magnet and putative spin liquid
journal, December 2018

Evidence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate
journal, December 2016

Quantum spin liquids
journal, November 2000

Antiferromagnetic ordering and dipolar interactions of ${YbAlO}_{3}$
journal, May 2019

Field-tunable quantum disordered ground state in the triangular-lattice antiferromagnet NaYbO2
journal, July 2019

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

Experimental Realization of a Spin- $1 / 2$ Triangular-Lattice Heisenberg Antiferromagnet
journal, January 2012

Crystal Synthesis and Frustrated Magnetism in Triangular Lattice Cs RE Se ₂ ( RE = La–Lu): Quantum Spin Liquid Candidates CsCeSe ₂ and CsYbSe ₂
journal, November 2019

Series of phase transitions and multiferroicity in the quasi-two-dimensional spin- $\frac{1}{2}$ triangular-lattice antiferromagnet ${Ba}_{3} {CoNb}_{2} O_{9}$
journal, March 2014

Kitaev-Heisenberg Model on a Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides $A_{2} {IrO}_{3}$
journal, July 2010

Specific heat of quantum Heisenberg model on a triangular lattice with two exchange parameters and its application to ${}^{3}{He}$ adsorbed on graphite
journal, June 1992

Valence Bonds in Random Quantum Magnets: Theory and Application to ${YbMgGaO}_{4}$
journal, July 2018

Synthesis, magnetization, and heat capacity of triangular lattice materials ${NaErSe}_{2}$ and ${KErSe}_{2}$
journal, November 2019

The new cold neutron chopper spectrometer at the Spallation Neutron Source: Design and performance
journal, August 2011

The cold neutron chopper spectrometer at the Spallation Neutron Source—A review of the first 8 years of operation
journal, September 2016

Horace : Software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments
journal, October 2016

Low-temperature crystal and magnetic structure of $α - {RuCl}_{3}$
journal, April 2016

Single-site magnetic anisotropy governed by interlayer cation charge imbalance in triangular-lattice $A Yb X_{2}$
journal, November 2019

Field-induced incommensurate ordering in Heisenberg chains coupled by Ising interaction: Model for ytterbium aluminum perovskite ${YbAlO}_{3}$
journal, June 2019

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

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

Spin liquids in frustrated magnets
journal, March 2010

Topography of Spin Liquids on a Triangular Lattice
journal, May 2018

Disorder-Induced Mimicry of a Spin Liquid in ${YbMgGaO}_{4}$
journal, October 2017

Simple Variational Wave Functions for Two-Dimensional Heisenberg Spin-½ Antiferromagnets
journal, June 1988

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

Fractionalized excitations in the partially magnetized spin liquid candidate YbMgGaO4
journal, October 2018

Field-induced instability of the quantum spin liquid ground state in the $J_{eff} = \frac{1}{2}$ triangular-lattice compound ${NaYbO}_{2}$
journal, May 2019

Novel Strongly Spin-Orbit Coupled Quantum Dimer Magnet: ${Yb}_{2} {Si}_{2} O_{7}$
journal, July 2019

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

Hyperhoneycomb Iridate $β − {Li}_{2} {IrO}_{3}$ as a Platform for Kitaev Magnetism
journal, February 2015

Gapless quantum spin liquid ground state in the two-dimensional spin-1/2 triangular antiferromagnet YbMgGaO4
journal, November 2015

Quantum theory of an antiferromagnet on a triangular lattice in a magnetic field
journal, January 1991

Structure of the magnetic excitations in the spin-1/2 triangular-lattice Heisenberg antiferromagnet Ba3CoSb2O9
journal, August 2017

Relevance of the Heisenberg-Kitaev Model for the Honeycomb Lattice Iridates $A_{2} {IrO}_{3}$
journal, March 2012

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

Rare-Earth Triangular Lattice Spin Liquid: A Single-Crystal Study of ${YbMgGaO}_{4}$
journal, October 2015

Specific Heat and Magnetic Susceptibility of Ising-Like Anisotropic Heisenberg Model on Kagome Lattice
journal, August 2011

Magnetization plateau in the frustrated quantum spin system ${Cs}_{2} {CuBr}_{4}$
journal, March 2003

Field-induced lattice staircase in a frustrated antiferromagnet $Cu Fe O_{2}$
journal, November 2006

Anomalous Thermal Conductivity and Magnetic Torque Response in the Honeycomb Magnet $α − {RuCl}_{3}$
journal, May 2017

Quantum spin liquid in the spin- $1 ∕ 2$ triangular antiferromagnet $Et {Me}_{3} Sb {[Pd {(dmit)}_{2}]}_{2}$
journal, March 2008

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

Direct evidence of a zigzag spin-chain structure in the honeycomb lattice: A neutron and x-ray diffraction investigation of single-crystal Na $_{2}$ IrO $_{3}$
journal, May 2012

Two-Dimensional Kagome Correlations and Field Induced Order in the Ferromagnetic $X Y$ Pyrochlore ${Yb}_{2} {Ti}_{2} O_{7}$
journal, November 2009

Tomonaga–Luttinger liquid behavior and spinon confinement in YbAlO3
journal, February 2019

Magnetic phase diagram of ${Ba}_{3} {CoSb}_{2} O_{9}$ as determined by ultrasound velocity measurements
journal, July 2015

Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet ${YbMgGaO}_{4}$
journal, August 2016

Hierarchy of Exchange Interactions in the Triangular-Lattice Spin Liquid ${YbMgGaO}_{4}$
journal, July 2018

${Na}_{2} {IrO}_{3}$ as a Molecular Orbital Crystal
journal, November 2012

Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3
journal, May 2015

Gapless spin-liquid state in the structurally disorder-free triangular antiferromagnet ${NaYbO}_{2}$
journal, October 2019

Spin-Wave Excitations Evidencing the Kitaev Interaction in Single Crystalline $α − {RuCl}_{3}$
journal, March 2017

Na2IrO3 as a molecular orbital crystal
text, January 2012

Quantum Phase Diagram of the Triangular-Lattice XXZ Model in a Magnetic Field
text, January 2013

HORACE: software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments
text, January 2016

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

Hierarchy of exchange interactions in the triangular-lattice spin-liquid YbMgGaO$_{4}$
text, January 2017