Lifshitz transition in two-dimensional spin-density wave models

Article

关键词: ELECTRONIC TOPOLOGICAL TRANSITIONS;    SUPERCONDUCTIVITY;    INSULATOR;    METALS;   

DOI  :  10.1103/PhysRevB.82.195110

来源: SCIE

【 摘 要 】

We argue that both pocket-disappearing and neck-disrupting types of Lifshitz transitions can be realized in two-dimensional spin-density wave models for underdoped cuprates, and study both types of transitions with impurity scattering treated in the self-consistent Born approximation. We first solve for the electron self-energy from the self-consistent equation, and then study the low-temperature electrical conductivity and thermopower. Close to the Lifshitz transition, the thermopower is strongly enhanced. For the pocket-disappearing type, it has a sharp peak while for the neck-disrupting type, it changes sign at the transition, with its absolute value peaked on both sides of the transition. We discuss possible applications to underdoped cuprates.

【 授权许可】

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