{"title":"Harnessing orbital and valley thermal transport in 2D materials: The significance of inversion symmetry.","authors":"Shivam Sharma, Abir De Sarkar","doi":"10.1088/1361-648X/ad9f0a","DOIUrl":null,"url":null,"abstract":"<p><p>Orbitronics and valleytronics, analogous to spintronics, leverage the
orbital degree of freedom and the valley degree of freedom of electrons to carry
information, promising significant advancements in information processing. In
this study, we disentangle the orbital and valley Nernst effect in 2D monolayers,
based on the global symmetry of the monolayers. We conduct an in-depth
analysis of the orbital (valley) Nernst effect in inversion symmetric (asymmetric)
monolayers, using an analytical tight binding model. Furthermore, we elucidate
the dependence of the two effects on various inherent materials' parameters using
the prototypical Kane-Mele model. Our calculations show that an inversion
symmetric gapped Kagome lattice shows a significant orbital Nernst effect
emerging from the interatomic contribution, even in the absence of both spin
and valley Nernst effects. Furthermore, for the inversion asymmetric 2H-phase
of TMDs, we elucidate that the valley degree of freedom encompasses the orbital
degree of freedom and the valley Nernst effect can be more accurately described
using the orbital degree of freedom, hence termed as the valley-orbital Nernst
effect.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics: Condensed Matter","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1088/1361-648X/ad9f0a","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
引用次数: 0
Abstract
Orbitronics and valleytronics, analogous to spintronics, leverage the
orbital degree of freedom and the valley degree of freedom of electrons to carry
information, promising significant advancements in information processing. In
this study, we disentangle the orbital and valley Nernst effect in 2D monolayers,
based on the global symmetry of the monolayers. We conduct an in-depth
analysis of the orbital (valley) Nernst effect in inversion symmetric (asymmetric)
monolayers, using an analytical tight binding model. Furthermore, we elucidate
the dependence of the two effects on various inherent materials' parameters using
the prototypical Kane-Mele model. Our calculations show that an inversion
symmetric gapped Kagome lattice shows a significant orbital Nernst effect
emerging from the interatomic contribution, even in the absence of both spin
and valley Nernst effects. Furthermore, for the inversion asymmetric 2H-phase
of TMDs, we elucidate that the valley degree of freedom encompasses the orbital
degree of freedom and the valley Nernst effect can be more accurately described
using the orbital degree of freedom, hence termed as the valley-orbital Nernst
effect.
期刊介绍:
Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.