Variable thermoelectric parameters in Si / Ge zNR by electrostrictive application of localized strain

dc.contributor.authorSengupta, Amretashis
dc.date.accessioned2024-03-31T06:36:58Z
dc.date.available2024-03-31T06:36:58Z
dc.date.issued2024-03
dc.description.abstractIn this work, we propose the tuning of thermoelectric performance of zigzag monolayer Silicene and Germanene nanoribbon (SiNR/GeNR) with a reversible strain engineering method. By a proposed electrostrictive method a tensile or compressive moderate strain of ±2% orthogonal to the transport direction in a short region of the SiNR or GeNR is considered to be applied. A selfconsistent density functional tight binding (DFTB) approach is employed for the calculation of the electronic properties of the system, while the vibrational properties are computed with classical molecular dynamics simulations. Electron/phonon transport is computed with the Green’s function formalism. With the localized strain application it is observed that electron transmission and current through the Si or GeNR remains largely unaffected while a suppression of the phonon transport and thermal conductance can be achieved. A significant tuning is observed for thermoelectric figure of merit and variations are seen in the Seebeck coefficient and the thermoelectric power factor. Moreover the temperature and doping dependencies of these parameters also showed high degree of tunability with strain. The enhancements in thermoelectric figure of merit by such simple strain ON/OFF mechanism in a CMOS compatible architecture suggest good prospects for nanoscale thermoelectrics.en_US
dc.identifier.urihttps://ir.nbu.ac.in/handle/123456789/5173
dc.language.isoenen_US
dc.publisherUniversity of North Bengalen_US
dc.subjectVariable thermoelectric parametersen_US
dc.subjectSi / Ge zNRen_US
dc.subjectElectrostrictive applicationen_US
dc.subjectLocalized strainen_US
dc.titleVariable thermoelectric parameters in Si / Ge zNR by electrostrictive application of localized strainen_US
dc.title.alternativeJournal of Physics Research and Education, Vol. 2, March-2024, pp. 1-15en_US
dc.typeArticleen_US
periodical.editorDey, Rajat Kumar
periodical.nameJournal of Physics Research and Education
periodical.pageEnd15
periodical.pageStart1
periodical.volumeNumber2

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