13th International Conference on Quasicrystals | |
Magnetic-field dependence of Schottky specific heat in the 1/1 Zn-Sc-Tm approximant | |
Dolinek, J.^1 | |
J. Stefan Institute, University of Ljubljana, Faculty of Mathematics and Physics, Jamova 39, Ljubljana | |
SI-1000, Slovenia^1 | |
关键词: Approximants; Crystalline electric fields; Hund's rule; Interacting electrons; Low-temperature specific heat; Magnetic field dependences; Schottky effect; Single ion; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/809/1/012012/pdf DOI : 10.1088/1742-6596/809/1/012012 |
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来源: IOP | |
【 摘 要 】
The analysis of low-temperature specific heat of rare-earth (RE)-containing quasicrystals and periodic approximants and consequent interpretation of their electronic properties in the T → 0 limit is frequently hampered by the Schottky effect, where crystalline electric fields lift degeneracy of the RE-ion Hund's rule ground state and introduce additional contribution to the specific heat. When the low-temperature specific heat C is analyzed in the C/T versus T2scale, the Schottky effect (a single-ion property in a system of non-interacting electrons) and the electron-electron interactions both yield a very similar upturn in the T → 0 limit. The origin of the upturn can be unraveled from the magnetic-field dependence of the low-temperature specific heat.
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