Anomalous Nernst Effect in Nonmagnetic Nodal Line Semimetal PbTaSe$_2$

Autor:	Yokoi, K., Murakawa, H., Sakai, H., Hanasaki, N.
Rok vydání:	2021
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.106.115118
Popis:	PbTaSe$_2$ is a unique topological material, in which the number of nodal lines is expected to change at the structural transition between the lower temperature/pressure "L" phase and the higher temperature/pressure "H" phase. We report the anomalous Nernst effect attributed to the Berry curvature of nodal lines and its change with the structural transition. In the L phase, the Nernst coefficient ($S_{yx}$) shows the step-like magnetic field dependence reminiscent of the anomalous Nernst effect of nonmagnetic Dirac/Weyl semimetals. By applying hydrostatic pressure, we discovered that the amplitude of the anomalous component significantly decreases at the transition to the H phase, which might correspond to the partial annihilation of nodal line structures. Comment: 29 page, 14 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2112.00282 Zobrazit plný text záznamu View this record from Arxiv