McCollam A, Julian S R, Rourke P M C, Aoki D, Flouquet J
Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, United Kingdom.
Phys Rev Lett. 2005 May 13;94(18):186401. doi: 10.1103/PhysRevLett.94.186401. Epub 2005 May 9.
We present de Haas-van Alphen oscillation measurements showing a strong spin dependence of the quasiparticle mass enhancement in the heavy fermion superconductor CeCoIn5 at high magnetic fields. There is evidence that the Fermi-liquid temperature dependence of the oscillations, embodied in the Lifshitz-Kosevich equation, is breaking down on the most strongly renormalized Fermi surface sheets.
我们展示了德哈斯 - 范阿尔芬振荡测量结果，表明在高磁场下重费米子超导体CeCoIn5中，准粒子质量增强存在强烈的自旋依赖性。有证据表明，由 Lifshitz - Kosevich 方程体现的振荡的费米液体温度依赖性，在重整化最强的费米面片上正在失效。
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