Spin-valley coupled caloritronics with strained honeycomb lattices

Parijat Sengupta, Shaloo Rakheja

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The miniaturization of circuit components introduces the problem of localized heating that can give rise to temperature overshoots and degradation in circuit reliability. While the generated heat can be removed, a profitable spin-off is to transform the heat current into electric power taking advantage of the Seebeck effect. This constitutes the basis for electric-thermal energy conversion. The optimization of Seebeck-based power conversion techniques [1], of late, have received much attention as newer materials, notably graphene, hold promise of better thermoelectric operation demonstrated by a higher thermoelectric figure of merit, ZT, However, the absence of a finite band gap in graphene largely precludes its applicability; this shortcoming is alleviated in other two-dimensional (2D) gapped honeycomb lattices. The laboratory-grown silicene, germanene, and stanene (identified as the X-enes) with a buckled structure and gapped Dirac cones offer a viable alternative. Here, combining first-principles and analytic calculations, we examine a strained ferromagnetic X-ene based caloritronic device wherein a spin and valley resolved current (I-{\mathrm{t}\mathrm{h}}) flows on account of a temperature (T) gradient created difference in Fermi distribution (f) at the contacts.

Original languageEnglish (US)
Title of host publication2019 Device Research Conference, DRC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages2
ISBN (Electronic)9781728121123
StatePublished - Jun 2019
Externally publishedYes
Event2019 Device Research Conference, DRC 2019 - Ann Arbor, United States
Duration: Jun 23 2019Jun 26 2019

Publication series

NameDevice Research Conference - Conference Digest, DRC
ISSN (Print)1548-3770


Conference2019 Device Research Conference, DRC 2019
Country/TerritoryUnited States
CityAnn Arbor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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