Lifshitz transition in two-dimensional spin-density wave models - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




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Abstract: We argue that both pocket-disappearing and neck-disrupting types of Lifshitztransitions can be realized in two-dimensional spin-density wave models forunderdoped cuprates, and study both types of transitions with impurityscattering treated in the self-consistent Born approximation. We first solvefor the electron self-energy from the self-consistent equation, and then studythe low-temperature electrical conductivity and thermopower. Close to theLifshitz transition, the thermopower is strongly enhanced. For thepocket-disappearing type, it has a sharp peak, while for the neck-disruptingtype, it changes sign at the transition, with its absolute value peaked on bothsides of the transition. We discuss possible applications to underdopedcuprates.



Author: Jie Lin

Source: https://arxiv.org/







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