{"title":"Nernst Plateau in the Quantum Limit of Topological Insulators","authors":"Peng-Lu Zhao, J. L. Zhang, Hai-Zhou Lu, Qian Niu","doi":"arxiv-2409.07199","DOIUrl":null,"url":null,"abstract":"Nernst effect, a transverse electric current induced by a temperature\ngradient, is a promising tool for revealing emergent phases of condensed\nmatter. We find a Nernst coefficient plateau in low carrier density topological\ninsulators, as a signature of 1D Weyl points in the quantum limit of the weak\ntopological insulator. The plateau height is inversely proportional to the\nimpurity density, suggesting a way to engineer infinitely large Nernst effects.\nThe Nernst plateau also exists in strong topological insulators, at the bottom\nof the lowest Landau band. We show that these plateaus have been overlooked in\nthe previous experiments and we highlight the experimental conditions to\nobserve them. Our results may inspire more investigations of employing\nanomalous Nernst effect to identify emergent phases of condensed matter.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"29 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Strongly Correlated Electrons","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.07199","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Nernst effect, a transverse electric current induced by a temperature
gradient, is a promising tool for revealing emergent phases of condensed
matter. We find a Nernst coefficient plateau in low carrier density topological
insulators, as a signature of 1D Weyl points in the quantum limit of the weak
topological insulator. The plateau height is inversely proportional to the
impurity density, suggesting a way to engineer infinitely large Nernst effects.
The Nernst plateau also exists in strong topological insulators, at the bottom
of the lowest Landau band. We show that these plateaus have been overlooked in
the previous experiments and we highlight the experimental conditions to
observe them. Our results may inspire more investigations of employing
anomalous Nernst effect to identify emergent phases of condensed matter.