Origin of the intermediate-temperature magnetic specific heat capacity in the spin-liquid candidate Ca10Cr7O28

Joe Crossley; Chris Hooley

doi:10.1103/PhysRevB.109.165138

Origin of the intermediate-temperature magnetic specific heat capacity in the spin-liquid candidate Ca₁₀Cr₇O₂₈

Joe Crossley^*, Chris Hooley

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present several approximate calculations of the specific heat capacity of the model for Ca₁₀Cr₇O₂₈ proposed by Balz et al. [Phys. Rev. B 95, 174414 (2017)], using methods including exact diagonalization, thermal pure quantum states, and high-temperature expansions. In none of these cases are we able to reproduce the magnitude of the zero-field specific heat capacity shown in the intermediate-temperature (∼5–15K) experimental data. We discuss possible reasons for the discrepancy, and what it might tell us about the magnetic Hamiltonian for Ca₁₀Cr₇O₂₈.

Original language	English
Article number	165138
Number of pages	6
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	109
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.109.165138
Publication status	Published - 19 Apr 2024

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Crossley-2024-Origin-of-the-intermediate-PhysRevB-109-165138-CCBY
Copyright © 2024 the Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
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Controlling Emergent Orders in Quantum: Controlling Emergent Orders in Quantum Materials
Wahl, P. (PI), Hooley, C. (CoI) & Lee, S. (CoI)
EPSRC
1/06/18 → 30/06/23
Project: Standard

Cite this

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title = "Origin of the intermediate-temperature magnetic specific heat capacity in the spin-liquid candidate Ca10Cr7O28",

abstract = "We present several approximate calculations of the specific heat capacity of the model for Ca10Cr7O28 proposed by Balz et al. [Phys. Rev. B 95, 174414 (2017)], using methods including exact diagonalization, thermal pure quantum states, and high-temperature expansions. In none of these cases are we able to reproduce the magnitude of the zero-field specific heat capacity shown in the intermediate-temperature (∼5–15K) experimental data. We discuss possible reasons for the discrepancy, and what it might tell us about the magnetic Hamiltonian for Ca10Cr7O28.",

author = "Joe Crossley and Chris Hooley",

note = "Funding: JAC acknowledges support from UKRI via EPSRC grant EP/T518062/1. CAH acknowledges support from UKRI via EPSRC grant EP/R031924/1. ",

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doi = "10.1103/PhysRevB.109.165138",

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AU - Crossley, Joe

AU - Hooley, Chris

N1 - Funding: JAC acknowledges support from UKRI via EPSRC grant EP/T518062/1. CAH acknowledges support from UKRI via EPSRC grant EP/R031924/1.

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N2 - We present several approximate calculations of the specific heat capacity of the model for Ca10Cr7O28 proposed by Balz et al. [Phys. Rev. B 95, 174414 (2017)], using methods including exact diagonalization, thermal pure quantum states, and high-temperature expansions. In none of these cases are we able to reproduce the magnitude of the zero-field specific heat capacity shown in the intermediate-temperature (∼5–15K) experimental data. We discuss possible reasons for the discrepancy, and what it might tell us about the magnetic Hamiltonian for Ca10Cr7O28.

AB - We present several approximate calculations of the specific heat capacity of the model for Ca10Cr7O28 proposed by Balz et al. [Phys. Rev. B 95, 174414 (2017)], using methods including exact diagonalization, thermal pure quantum states, and high-temperature expansions. In none of these cases are we able to reproduce the magnitude of the zero-field specific heat capacity shown in the intermediate-temperature (∼5–15K) experimental data. We discuss possible reasons for the discrepancy, and what it might tell us about the magnetic Hamiltonian for Ca10Cr7O28.

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DO - 10.1103/PhysRevB.109.165138

M3 - Article

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VL - 109

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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Origin of the intermediate-temperature magnetic specific heat capacity in the spin-liquid candidate Ca10Cr7O28

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Controlling Emergent Orders in Quantum: Controlling Emergent Orders in Quantum Materials

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Origin of the intermediate-temperature magnetic specific heat capacity in the spin-liquid candidate Ca₁₀Cr₇O₂₈