What Is The Origin of The Intermediate-temperature Magnetic Specific Heat Capacity in The Spin-liquid Candidate Ca10Cr7O28?

APS  ·  2024

Christopher Hooley; Joe Crossley;

HIGHLIGHT

We present several approximate calculations of the specific heat capacity of the model for Ca 10Cr 7O 28 proposed by Balz et al. [ Phys.

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ABSTRACT

We present several approximate calculations of the specific heat capacity of the model for Ca 10Cr 7O 28 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 Ca 10Cr 7O 28.

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