Spin liquid state in the disordered triangular lattice Sc2Ga2CuO7 revealed by NMR

Khuntia, P.; Kumar, R.; Mahajan, A. V.; Baenitz, M.; Furukawa, Y.

doi:10.1103/PhysRevB.93.140408

Title: Spin liquid state in the disordered triangular lattice Sc₂Ga₂CuO₇ revealed by NMR

Abstract

We present microscopic magnetic properties of a two-dimensional triangular lattice Sc₂Ga₂CuO₇, consisting of single and double triangular Cu planes. An antiferromagnetic (AFM) exchange interaction J/k_B ≈ 35 K between Cu²⁺ (S = 1/2) spins in the triangular biplane is obtained from the analysis of intrinsic magnetic susceptibility data. The intrinsic magnetic susceptibility, extracted from ⁷¹Ga NMR shift data, displays the presence of AFM short range spin correlations and remains finite down to 50 mK, suggesting a nonsinglet ground state. The nuclear spin-lattice relaxation rate (1/T₁) reveals a slowing down of Cu²⁺ spin fluctuations with decreasing T down to 100 mK. Magnetic specific heat (C_m) and 1/T₁ exhibit power law behavior at low temperatures, implying the gapless nature of the spin excitation spectrum. The absence of long range magnetic ordering down to ~J/700, nonzero spin susceptibility at low T, and the power law behavior of C_m and 1/T₁ suggest a gapless quantum spin liquid (QSL) state. Our results demonstrate that persistent spin dynamics induced by frustration maintain a quantum-disordered state at T → 0 in this triangular lattice antiferromagnet. Furthermore, this suggests that the low energy modes are dominated by spinon excitations in the QSL state due to randomness engendered bymore » disorder and frustration.« less

Authors:

Khuntia, P. ^[1]; Kumar, R. ^[2]; Mahajan, A. V. ^[2]; Baenitz, M. ^[3]; Furukawa, Y. ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States)
Indian Institute of Technology Bombay Powai Mumbai (India)
Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)

Publication Date:: Mon Apr 18 00:00:00 EDT 2016

Research Org.:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1259550

Alternate Identifier(s):: OSTI ID: 1247906

Report Number(s):: IS-J-9012
Journal ID: ISSN 2469-9950; PRBMDO

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 93; Journal Issue: 14; 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

Citation Formats


                    Khuntia, P., Kumar, R., Mahajan, A. V., Baenitz, M., and Furukawa, Y. Spin liquid state in the disordered triangular lattice Sc2Ga2CuO7 revealed by NMR.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevB.93.140408.

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                    Khuntia, P., Kumar, R., Mahajan, A. V., Baenitz, M., & Furukawa, Y. Spin liquid state in the disordered triangular lattice Sc2Ga2CuO7 revealed by NMR.  United States.  https://doi.org/10.1103/PhysRevB.93.140408

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                    Khuntia, P., Kumar, R., Mahajan, A. V., Baenitz, M., and Furukawa, Y. Mon .  
"Spin liquid state in the disordered triangular lattice Sc2Ga2CuO7 revealed by NMR".  United States.  https://doi.org/10.1103/PhysRevB.93.140408.  https://www.osti.gov/servlets/purl/1259550.

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@article{osti_1259550,

  title        = {Spin liquid state in the disordered triangular lattice Sc2Ga2CuO7 revealed by NMR},

  author       = {Khuntia, P. and Kumar, R. and Mahajan, A. V. and Baenitz, M. and Furukawa, Y.},

  abstractNote = {We present microscopic magnetic properties of a two-dimensional triangular lattice Sc2Ga2CuO7, consisting of single and double triangular Cu planes. An antiferromagnetic (AFM) exchange interaction J/kB ≈ 35 K between Cu2+ (S = 1/2) spins in the triangular biplane is obtained from the analysis of intrinsic magnetic susceptibility data. The intrinsic magnetic susceptibility, extracted from 71Ga NMR shift data, displays the presence of AFM short range spin correlations and remains finite down to 50 mK, suggesting a nonsinglet ground state. The nuclear spin-lattice relaxation rate (1/T1) reveals a slowing down of Cu2+ spin fluctuations with decreasing T down to 100 mK. Magnetic specific heat (Cm) and 1/T1 exhibit power law behavior at low temperatures, implying the gapless nature of the spin excitation spectrum. The absence of long range magnetic ordering down to ~J/700, nonzero spin susceptibility at low T, and the power law behavior of Cm and 1/T1 suggest a gapless quantum spin liquid (QSL) state. Our results demonstrate that persistent spin dynamics induced by frustration maintain a quantum-disordered state at T → 0 in this triangular lattice antiferromagnet. Furthermore, this suggests that the low energy modes are dominated by spinon excitations in the QSL state due to randomness engendered by disorder and frustration.},

  doi          = {10.1103/PhysRevB.93.140408},

  journal      = {Physical Review B},

  number       = 14,

  volume       = 93,

  place        = {United States},

  year         = {Mon Apr 18 00:00:00 EDT 2016},

  month        = {Mon Apr 18 00:00:00 EDT 2016}

}

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Works referencing / citing this record:

Tuning of a Kagome Magnet: Insulating Ground State in Ga‐Substituted Cu 4 (OH) 6 Cl 2
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Puphal, Pascal; Ranjith, Kizhake Malayil; Pustogow, Andrej
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A new high-temperature quantum spin liquid with polaron spins
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Title: Spin liquid state in the disordered triangular lattice Sc2Ga2CuO7 revealed by NMR

Abstract

Citation Formats

Spin liquids in frustrated magnets journal, March 2010

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

Quantum magnetism and criticality journal, March 2008

Fishing the Fermi sea journal, March 2008

Introduction to Frustrated Magnetism book, January 2011

Spin Ice State in Frustrated Magnetic Pyrochlore Materials journal, November 2001

Colloquium : Artificial spin ice: Designing and imaging magnetic frustration journal, October 2013

Magnetic pyrochlore oxides journal, January 2010

Magnetic monopoles in spin ice journal, January 2008

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

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

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

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

Spin Dynamics of the Spin- 1 / 2 Kagome Lattice Antiferromagnet ZnCu 3 ( OH ) 6 Cl 2 journal, March 2007

Field-Induced Freezing of a Quantum Spin Liquid on the Kagome Lattice journal, November 2011

O 17 NMR Study of the Intrinsic Magnetic Susceptibility and Spin Dynamics of the Quantum Kagome Antiferromagnet ZnCu 3 ( OH ) 6 Cl 2 journal, February 2008

Cu 63 , Cl 35 , and H 1 NMR in the S = 1 2 Kagome Lattice ZnCu 3 ( OH ) 6 Cl 2 journal, February 2008

Evidence for a gapped spin-liquid ground state in a kagome Heisenberg antiferromagnet journal, November 2015

Kapellasite: A Kagome Quantum Spin Liquid with Competing Interactions journal, July 2012

Gapless Spin Liquid Ground State in the S = 1 / 2 Vanadium Oxyfluoride Kagome Antiferromagnet [ NH 4 ] 2 [ C 7 H 14 N ] [ V 7 O 6 F 18 ] journal, May 2013

Quantum Spin Liquid in Frustrated One-Dimensional LiCuSbO 4 journal, May 2012

Quantum Kagome Antiferromagnet ZnCu 3 (OH) 6 Cl 2 journal, January 2010

Spin-Liquid State in the S = 1 / 2 Hyperkagome Antiferromagnet Na 4 Ir 3 O 8 journal, September 2007

Entropy Balance and Evidence for Local Spin Singlets in a Kagomé-Like Magnet journal, March 2000

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

Magnetic and non-magnetic phases of a quantum spin liquid journal, March 2011

Thermodynamic properties of a spin-1/2 spin-liquid state in a κ-type organic salt journal, April 2008

Instability of a quantum spin liquid in an organic triangular-lattice antiferromagnet journal, July 2010

Dynamics and Transport of the Z 2 Spin Liquid: Application to κ − ( ET ) 2 Cu 2 ( CN ) 3 journal, April 2009

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

Fermionic Spin Excitations in Two- and Three-Dimensional Antiferromagnets journal, October 2009

Novel Pauli-paramagnetic quantum phase in a Mott insulator journal, January 2012

Quantum orders and symmetric spin liquids journal, April 2002

Spin Liquid State in the 3D Frustrated Antiferromagnet PbCuTe 2 O 6 : NMR and Muon Spin Relaxation Studies journal, March 2016

Quantum spin liquid emerging in two-dimensional correlated Dirac fermions journal, April 2010

Gapless Spin Liquids on the Three-Dimensional Hyperkagome Lattice of Na 4 Ir 3 O 8 journal, November 2008

Properties of an algebraic spin liquid on the kagome lattice journal, June 2008

Projected-Wave-Function Study of the Spin- 1 / 2 Heisenberg Model on the Kagomé Lattice journal, March 2007

Spin-Peierls Instability of Three-Dimensional Spin Liquids with Majorana Fermi Surfaces journal, October 2015

Quantum spin liquid with a Majorana Fermi surface on the three-dimensional hyperoctagon lattice journal, June 2014

Heisenberg-Kitaev model on the hyperhoneycomb lattice journal, January 2014

Spin Liquid State in the S = 1 / 2 Triangular Lattice Ba 3 CuSb 2 O 9 journal, April 2011

Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice journal, May 2012

Singlet Ground State of the Quantum Antiferromagnet Ba 3 CuSb 2 O 9 journal, September 2012

High-Pressure Sequence of Ba 3 NiSb 2 O 9 Structural Phases: New S = 1 Quantum Spin Liquids Based on Ni 2 + journal, November 2011

Spin-liquid behavior in J eff = 1 2 triangular lattice compound Ba 3 IrTi 2 O 9 journal, October 2012

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

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

Disorder-Driven Spin-Orbital Liquid Behavior in the Ba 3 X Sb 2 O 9 Materials journal, October 2015

Quantum Spin Liquid Emerging from Antiferromagnetic Order by Introducing Disorder journal, August 2015

Sc 2 Ga 2 CuO 7 : A possible quantum spin liquid near the percolation threshold journal, November 2015

Strongly Geometrically Frustrated Magnets journal, August 1994

High-Temperature Expansions for the Classical Heisenberg Model. II. Zero-Field Susceptibility journal, June 1967

Finite temperature properties of the spin-1/2 Heisenberg antiferromagnet on the triangular lattice journal, September 1993

Nonmagnetic impurities in a S = 1 2 frustrated triangular antiferromagnet: Broadening of C 13 NMR lines in κ − ( ET ) 2 Cu 2 ( CN ) 3 journal, January 2009

Multicritical phenomena in O ( n 1 ) ⊕ O ( n 2 ) -symmetric theories journal, February 2003

Topological Spin Liquid on the Hyperkagome Lattice of Na 4 Ir 3 O 8 journal, June 2008

Na 4 Ir 3 O 8 as a 3D Spin Liquid with Fermionic Spinons journal, November 2008

Amperean Pairing Instability in the U(1) Spin Liquid State with Fermi Surface and Application to κ − ( BEDT − TTF ) 2 Cu 2 ( CN ) 3 journal, February 2007

Quantum Spin-Liquid Behavior in the Spin-1/2 Random Heisenberg Antiferromagnet on the Triangular Lattice journal, March 2014

Possible spin-orbit driven spin-liquid ground state in the double perovskite phase of Ba 3 YIr 2 O 9 journal, October 2013

Nuclear Magnetic Relaxation journal, October 1947

Static and dynamical spin correlations of the S = 1 2 random-bond antiferromagnetic Heisenberg model on the triangular and kagome lattices journal, October 2015

Z 2 gauge theory of electron fractionalization in strongly correlated systems journal, September 2000

Spin- 1 2 Heisenberg antiferromagnet on the kagome lattice: Z 2 spin liquid with fermionic spinons journal, June 2013

Gapless spin-liquid phase in the kagome spin- 1 2 Heisenberg antiferromagnet journal, February 2013

Tuning of a Kagome Magnet: Insulating Ground State in Ga‐Substituted Cu 4 (OH) 6 Cl 2 journal, February 2019

A high-temperature quantum spin liquid with polaron spins journal, July 2017

(BEDT-TTF)2Cu2(CN)3 Spin Liquid: Beyond the Average Structure journal, April 2018

A new high-temperature quantum spin liquid with polaron spins text, January 2017

Title: Spin liquid state in the disordered triangular lattice Sc₂Ga₂CuO₇ revealed by NMR

Spin liquids in frustrated magnets
journal, March 2010

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

Quantum magnetism and criticality
journal, March 2008

Fishing the Fermi sea
journal, March 2008

Introduction to Frustrated Magnetism
book, January 2011

Spin Ice State in Frustrated Magnetic Pyrochlore Materials
journal, November 2001

Colloquium : Artificial spin ice: Designing and imaging magnetic frustration
journal, October 2013

Magnetic pyrochlore oxides
journal, January 2010

Magnetic monopoles in spin ice
journal, January 2008

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

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

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

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

Spin Dynamics of the Spin- $1 / 2$ Kagome Lattice Antiferromagnet ${ZnCu}_{3} (OH)_{6} {Cl}_{2}$
journal, March 2007

Field-Induced Freezing of a Quantum Spin Liquid on the Kagome Lattice
journal, November 2011

${}^{17}O$ NMR Study of the Intrinsic Magnetic Susceptibility and Spin Dynamics of the Quantum Kagome Antiferromagnet ${ZnCu}_{3} (OH)_{6} {Cl}_{2}$
journal, February 2008

${}^{63}{Cu}$ , ${}^{35}{Cl}$ , and ${}^{1}H$ NMR in the $S = \frac{1}{2}$ Kagome Lattice ${ZnCu}_{3} (OH)_{6} {Cl}_{2}$
journal, February 2008

Evidence for a gapped spin-liquid ground state in a kagome Heisenberg antiferromagnet
journal, November 2015

Kapellasite: A Kagome Quantum Spin Liquid with Competing Interactions
journal, July 2012

Gapless Spin Liquid Ground State in the $S = 1 / 2$ Vanadium Oxyfluoride Kagome Antiferromagnet $[{NH}_{4}]_{2} [C_{7} H_{14} N] [V_{7} O_{6} F_{18}]$
journal, May 2013

Quantum Spin Liquid in Frustrated One-Dimensional ${LiCuSbO}_{4}$
journal, May 2012

Quantum Kagome Antiferromagnet ZnCu ₃ (OH) ₆ Cl ₂
journal, January 2010

Spin-Liquid State in the $S = 1 / 2$ Hyperkagome Antiferromagnet ${Na}_{4} {Ir}_{3} O_{8}$
journal, September 2007

Entropy Balance and Evidence for Local Spin Singlets in a Kagomé-Like Magnet
journal, March 2000

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

Magnetic and non-magnetic phases of a quantum spin liquid
journal, March 2011

Thermodynamic properties of a spin-1/2 spin-liquid state in a κ-type organic salt
journal, April 2008

Instability of a quantum spin liquid in an organic triangular-lattice antiferromagnet
journal, July 2010

Dynamics and Transport of the $Z_{2}$ Spin Liquid: Application to $κ − (ET)_{2} {Cu}_{2} (CN)_{3}$
journal, April 2009

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

Fermionic Spin Excitations in Two- and Three-Dimensional Antiferromagnets
journal, October 2009

Novel Pauli-paramagnetic quantum phase in a Mott insulator
journal, January 2012

Quantum orders and symmetric spin liquids
journal, April 2002

Spin Liquid State in the 3D Frustrated Antiferromagnet ${PbCuTe}_{2} O_{6}$ : NMR and Muon Spin Relaxation Studies
journal, March 2016

Quantum spin liquid emerging in two-dimensional correlated Dirac fermions
journal, April 2010

Gapless Spin Liquids on the Three-Dimensional Hyperkagome Lattice of ${Na}_{4} {Ir}_{3} O_{8}$
journal, November 2008

Properties of an algebraic spin liquid on the kagome lattice
journal, June 2008

Projected-Wave-Function Study of the Spin- $1 / 2$ Heisenberg Model on the Kagomé Lattice
journal, March 2007

Spin-Peierls Instability of Three-Dimensional Spin Liquids with Majorana Fermi Surfaces
journal, October 2015

Quantum spin liquid with a Majorana Fermi surface on the three-dimensional hyperoctagon lattice
journal, June 2014

Heisenberg-Kitaev model on the hyperhoneycomb lattice
journal, January 2014

Spin Liquid State in the $S = 1 / 2$ Triangular Lattice ${Ba}_{3} {CuSb}_{2} O_{9}$
journal, April 2011

Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice
journal, May 2012

Singlet Ground State of the Quantum Antiferromagnet ${Ba}_{3} {CuSb}_{2} O_{9}$
journal, September 2012

High-Pressure Sequence of ${Ba}_{3} {NiSb}_{2} O_{9}$ Structural Phases: New $S = 1$ Quantum Spin Liquids Based on ${Ni}^{2 +}$
journal, November 2011

Spin-liquid behavior in $J_{eff} = \frac{1}{2}$ triangular lattice compound Ba $_{3}$ IrTi $_{2}$ O $_{9}$
journal, October 2012

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

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

Disorder-Driven Spin-Orbital Liquid Behavior in the ${Ba}_{3} X {Sb}_{2} O_{9}$ Materials
journal, October 2015

Quantum Spin Liquid Emerging from Antiferromagnetic Order by Introducing Disorder
journal, August 2015

${Sc}_{2} {Ga}_{2} {CuO}_{7}$ : A possible quantum spin liquid near the percolation threshold
journal, November 2015

Strongly Geometrically Frustrated Magnets
journal, August 1994

High-Temperature Expansions for the Classical Heisenberg Model. II. Zero-Field Susceptibility
journal, June 1967

Finite temperature properties of the spin-1/2 Heisenberg antiferromagnet on the triangular lattice
journal, September 1993

Nonmagnetic impurities in a $S = \frac{1}{2}$ frustrated triangular antiferromagnet: Broadening of ${}^{13}C$ NMR lines in $κ − {(ET)}_{2} {Cu}_{2} {(CN)}_{3}$
journal, January 2009

Multicritical phenomena in $O {(n}_{1}) \oplus O {(n}_{2})$ -symmetric theories
journal, February 2003

Topological Spin Liquid on the Hyperkagome Lattice of ${Na}_{4} {Ir}_{3} O_{8}$
journal, June 2008

${Na}_{4} {Ir}_{3} O_{8}$ as a 3D Spin Liquid with Fermionic Spinons
journal, November 2008

Amperean Pairing Instability in the U(1) Spin Liquid State with Fermi Surface and Application to $κ − (BEDT − TTF)_{2} {Cu}_{2} (CN)_{3}$
journal, February 2007

Quantum Spin-Liquid Behavior in the Spin-1/2 Random Heisenberg Antiferromagnet on the Triangular Lattice
journal, March 2014

Possible spin-orbit driven spin-liquid ground state in the double perovskite phase of Ba $_{3}$ YIr $_{2}$ O $_{9}$
journal, October 2013

Nuclear Magnetic Relaxation
journal, October 1947

Static and dynamical spin correlations of the $S = \frac{1}{2}$ random-bond antiferromagnetic Heisenberg model on the triangular and kagome lattices
journal, October 2015

$Z_{2}$ gauge theory of electron fractionalization in strongly correlated systems
journal, September 2000

Spin- $\frac{1}{2}$ Heisenberg antiferromagnet on the kagome lattice: $Z_{2}$ spin liquid with fermionic spinons
journal, June 2013

Gapless spin-liquid phase in the kagome spin- $\frac{1}{2}$ Heisenberg antiferromagnet
journal, February 2013

Tuning of a Kagome Magnet: Insulating Ground State in Ga‐Substituted Cu 4 (OH) 6 Cl 2
journal, February 2019

A high-temperature quantum spin liquid with polaron spins
journal, July 2017

(BEDT-TTF)2Cu2(CN)3 Spin Liquid: Beyond the Average Structure
journal, April 2018

A new high-temperature quantum spin liquid with polaron spins
text, January 2017