期刊
NATURE PHYSICS
卷 7, 期 3, 页码 234-238出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS1873
关键词
-
资金
- Canadian Institute for Advanced Research
- Natural Science and Engineering Research Council
- French Agence Nationale pour la Recherche DELICE
- Euromagnet II
Measurements of quantum oscillations in the cuprate superconductors afford an opportunity to assess the extent to which their electronic properties yield to a description rooted in Fermi-liquid theory. However, such an analysis is hampered by the small number of oscillatory periods observed in the accessible magnetic field range. Here we employ a genetic algorithm to globally model the field, angular and temperature dependence of the quantum oscillations observed in the resistivity of YBa2Cu3O6.59. This approach successfully fits an entire data set to a Fermi surface consisting of two small, quasi-two-dimensional cylinders, rather than the large Fermi surface predicted by conventional electronic-structure calculations. A key result is the first identification of the effects of Zeeman splitting, indicating that the quasiparticles behave as nearly free spins, constraining the source of the Fermi-surface reconstruction to something other than a spin-density wave with moments perpendicular to the magnetic field.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据