Short-range order in the quantum XXZ honeycomb lattice material BaCo2(PO4)2

Nair, Harikrishnan S.; Brown, J; Coldren, E.; Hester, G.; Gelfand, M.; Podlesnyak, Andrey A.; Huang, Q.; Ross, K. A.

doi:10.1103/PhysRevB.97.134409

Title: Short-range order in the quantum XXZ honeycomb lattice material ${BaCo}_{2} {({PO}_{4})}_{2}$

Abstract

In this paper, we present observations of highly frustrated quasi-two-dimensional (2D) magnetic correlations in the honeycomb lattice layers of the S_eff =1/2 compound γ-BaCo₂(PO₄)₂ (γ-BCPO). Specific heat shows a broad peak comprised of two weak kink features at T_N1~6 K and T_N2~3.5 K, the relative weights of which can be modified by sample annealing. Neutron powder diffraction measurements reveal short range quasi-2D order that is established below T_N1 and T_N2, at which two separate, incompatible, short range magnetic orders onset: commensurate antiferromagnetic correlations with correlation length ξ_c=60±2 Å (T_N1) and in quasi-2D helical domains with ξ_h=350±11 Å (T_N2). The ac magnetic susceptibility response lacks frequency dependence, ruling out spin freezing. Inelastic neutron scattering data on γ-BCPO is compared with linear spin wave theory, and two separate parameter regions of the XXZ J₁-J₂-J₃ model with ferromagnetic nearest-neighbor exchange J₁ are favored, both near regions of high classical degeneracy. High energy coherent excitations (~10 meV) persist up to at least 40 K, suggesting strong in-plane correlations persist above TN. Finally, these data show that γ-BCPO is a rare highly frustrated, quasi-2D S_eff =1/2 honeycomb lattice material which resists long range magnetic order and spin freezing.

Authors:

Nair, Harikrishnan S. ^[1]; Brown, J ^[1]; Coldren, E. ^[1]; Hester, G. ^[1]; Gelfand, M. ^[1];

^[2]; Huang, Q. ^[3]; Ross, K. A. ^[4]

Colorado State Univ., Fort Collins, CO (United States). Department of Physics
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Colorado State Univ., Fort Collins, CO (United States). Department of Physics; Canadian Institute for Advanced Research (CIFAR), Toronto, Ontario (Canada). Quantum Materials Program

Publication Date:: 2018-04-12

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:: 1435190

Alternate Identifier(s):: OSTI ID: 1432902

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 97; Journal Issue: 13; 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


                    Nair, Harikrishnan S., Brown, J, Coldren, E., Hester, G., Gelfand, M., Podlesnyak, Andrey A., Huang, Q., and Ross, K. A. Short-range order in the quantum XXZ honeycomb lattice material BaCo2(PO4)2.  United States: N. p., 2018. 
Web.  doi:10.1103/PhysRevB.97.134409.

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                    Nair, Harikrishnan S., Brown, J, Coldren, E., Hester, G., Gelfand, M., Podlesnyak, Andrey A., Huang, Q., & Ross, K. A. Short-range order in the quantum XXZ honeycomb lattice material BaCo2(PO4)2.  United States.  https://doi.org/10.1103/PhysRevB.97.134409

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                    Nair, Harikrishnan S., Brown, J, Coldren, E., Hester, G., Gelfand, M., Podlesnyak, Andrey A., Huang, Q., and Ross, K. A. Thu .  
"Short-range order in the quantum XXZ honeycomb lattice material BaCo2(PO4)2".  United States.  https://doi.org/10.1103/PhysRevB.97.134409.  https://www.osti.gov/servlets/purl/1435190.

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@article{osti_1435190,

  title        = {Short-range order in the quantum XXZ honeycomb lattice material BaCo2(PO4)2},

  author       = {Nair, Harikrishnan S. and Brown, J and Coldren, E. and Hester, G. and Gelfand, M. and Podlesnyak, Andrey A. and Huang, Q. and Ross, K. A.},

  abstractNote = {In this paper, we present observations of highly frustrated quasi-two-dimensional (2D) magnetic correlations in the honeycomb lattice layers of the Seff =1/2 compound γ-BaCo2(PO4)2 (γ-BCPO). Specific heat shows a broad peak comprised of two weak kink features at TN1~6 K and TN2~3.5 K, the relative weights of which can be modified by sample annealing. Neutron powder diffraction measurements reveal short range quasi-2D order that is established below TN1 and TN2, at which two separate, incompatible, short range magnetic orders onset: commensurate antiferromagnetic correlations with correlation length ξc=60±2 Å (TN1) and in quasi-2D helical domains with ξh=350±11 Å (TN2). The ac magnetic susceptibility response lacks frequency dependence, ruling out spin freezing. Inelastic neutron scattering data on γ-BCPO is compared with linear spin wave theory, and two separate parameter regions of the XXZ J1-J2-J3 model with ferromagnetic nearest-neighbor exchange J1 are favored, both near regions of high classical degeneracy. High energy coherent excitations (~10 meV) persist up to at least 40 K, suggesting strong in-plane correlations persist above TN. Finally, these data show that γ-BCPO is a rare highly frustrated, quasi-2D Seff =1/2 honeycomb lattice material which resists long range magnetic order and spin freezing.},

  doi          = {10.1103/PhysRevB.97.134409},

  journal      = {Physical Review B},

  number       = 13,

  volume       = 97,

  place        = {United States},

  year         = {2018},

  month        = {4}

}

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Counterrotating magnetic order in the honeycomb layers of ${NaNi}_{2} {BiO}_{6 - δ}$
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Zhong, Ruidan; Gao, Tong; Ong, Nai Phuan
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Absence of Jahn−Teller transition in the hexagonal Ba ₃ CuSb ₂ O ₉ single crystal
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Magnetic ordering in a planar X - Y model: BaCo2(AsO4)2
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The magnetic properties and structure of the quasi-two-dimensional antiferromagnet CoPS ₃
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Polarized-neutron investigation of magnetic ordering and spin dynamics in BaCo 2 (AsO 4 ) 2 frustrated honeycomb-lattice magnet
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Quantum disordered phase on the frustrated honeycomb lattice
journal, March 2011

Zigzag antiferromagnetic ground state with anisotropic correlation lengths in the quasi-two-dimensional honeycomb lattice compound $N a_{2} C o_{2} Te O_{6}$
journal, March 2017

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journal, August 1978

Structure and Magnetic Properties of the α-NaFeO ₂ -Type Honeycomb Compound Na ₃ Ni ₂ BiO ₆
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Zig-zag magnetic ordering in honeycomb-layered Na3Co2SbO6
journal, November 2016

Disordered Ground State and Magnetic Field-Induced Long-Range Order in an $S = 3 / 2$ Antiferromagnetic Honeycomb Lattice Compound ${Bi}_{3} {Mn}_{4} O_{12} ({NO}_{3})$
journal, October 2010

Randomness-Induced Quantum Spin Liquid Behavior in the s = 1/2 Random J ₁ – J ₂ Heisenberg Antiferromagnet on the Honeycomb Lattice
journal, April 2017

Single-ion properties of the $S_{eff}$ = $\frac{1}{2}$ XY antiferromagnetic pyrochlores $Na A^{'} {Co}_{2} F_{7}$ ( $A^{'} = {Ca}^{2 +}, {Sr}^{2 +}$ )
journal, April 2017

Linear spin wave theory for single-Q incommensurate magnetic structures
journal, March 2015

Puzzling Polymorphism of Layered Ba(CoPO ₄ ) ₂
journal, July 2013

Exchange mixing and soliton dynamics in the quantum spin chain ${CsCoCl}_{3}$
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Non-simple magnetic order for simple Hamiltonians
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Exotic disordered phases in the quantum $J_{1}$ - $J_{2}$ model on the honeycomb lattice
journal, January 2013

X-Ray Diffraction in Random Layer Lattices
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Spin-glass behavior in a three-dimensional antiferromagnet ordered phase: Magnetic structure of ${Co}_{2} (OH) ({PO}_{4})$
journal, September 2002

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

Magnetic properties of pure and diamagnetically doped jarosites: Model kagomé antiferromagnets with variable coverage of the magnetic lattice
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A new high pressure form of Ba3NiSb2O9
journal, May 2016

Counterrotating magnetic order in the honeycomb layers of ${NaNi}_{2} {BiO}_{6 - δ}$
journal, December 2019

Weak-field induced nonmagnetic state in a Co-based honeycomb
journal, January 2020