Learning electron scattering parameters by analyzing thermoelectric data
ORAL
Abstract
The theoretical prediction of thermoelectric (TE) transport properties has made systematic use of the constant relaxation time approximation (CRTA), thus ignoring effects associated with the specific scattering mechanisms at work. The idea of improving the design of TE materials through scattering engineering is very powerful. Here we investigate the role of the CRTA in the electronic properties of well-known TE materials, by considering scattering models with energy and temperature dependence. The introduction of a self-consistent fitting procedure allows the existing models to be finely tuned for the individual experimental sample and, the contribution of each mechanism to be singled out without relying on experimental parameters. Transport coefficients, scattering models, and the fitting procedure have been computed with the recently developed PAOFLOW software (http://aflowlib.org/src/paoflow/).
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Presenters
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Anooja Jayaraj
Physics, University of North Texas, Denton, TX, USA
Authors
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Anooja Jayaraj
Physics, University of North Texas, Denton, TX, USA
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Ilaria Siloi
Physics, University of Southern California,Los Angeles, CA, Physics and Astronomy, Univ of Southern California
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Marco Fornari
Physics, Department of Physics and Science of Advanced Materials Program, Central Michigan University, Mt. Pleasant, MI, USA, Physics, Central Michigan Univ, Physics and Astronomy, Central Michigan University, Physics, Central Michigan University
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Marco Buongiorno Nardelli
Physics, University of North Texas, Denton, TX, USA, University of North Texas