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Journal Article

Thermodynamic constraints on the amplitude of quantum oscillations


Modic,  K. A.
Physics of Microstructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Shekhter, A., Modic, K. A., McDonald, R. D., & Ramshaw, B. J. (2017). Thermodynamic constraints on the amplitude of quantum oscillations. Physical Review B, 95(12): 121106, pp. 1-4. doi:10.1103/PhysRevB.95.121106.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-3CAE-D
Magneto-quantum oscillation experiments in high-temperature superconductors show a strong thermally induced suppression of the oscillation amplitude approaching the critical dopings [B.J. Ramshaw et al., Science 348, 317 (2014); H. Shishido et al., Phys. Rev. Lett. 104, 057008 (2010); P. Walmsley et al., Phys. Rev. Lett. 110, 257002 (2013)]-in support of a quantum-critical origin of their phase diagrams. We suggest that, in addition to a thermodynamic mass enhancement, these experiments may directly indicate the increasing role of quantum fluctuations that suppress the quantum oscillation amplitude through inelastic scattering. We show that the traditional theoretical approaches beyond Lifshitz-Kosevich to calculate the oscillation amplitude in correlated metals result in a contradiction with the third law of thermodynamics and suggest a way to rectify this problem.