Anomalous Nernst effect in the nonmagnetic nodal-line semimetal PbTaSe2
Source abstract
Abstract
${\mathrm{PbTaSe}}2$ 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 a steplike 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 markedly decreases at the transition to the H phase, which might correspond to the partial annihilation of nodal-line structures.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Topological Materials and Phenomena · Phase-change materials and chalcogenides · 2D Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
Department of Physics, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
Spintronics Research Network Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka 565-0871, Japan
Funding
Japan Science Society · Asahi Glass Foundation · Japan Science and Technology Corporation · Precursory Research for Embryonic Science and Technology · Japan Society for the Promotion of Science · Center for Spintronics Research Network, Tohoku University · Osaka University
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