15-20 June 2014
Laurentian University / Université Laurentienne
America/Toronto timezone
Welcome to the 2014 CAP Congress! / Bienvenue au congrès de l'ACP 2014!

The Enhancement of the Figure of Merit for Thermoelectric Materials

17 Jun 2014, 17:00
15m
C-204 (Laurentian University / Université Laurentienne)

C-204

Laurentian University / Université Laurentienne

Sudbury, Ontario
Oral (Non-Student) / orale (non-étudiant) Theoretical Physics / Physique théorique (DTP-DPT) (T3-6) Control of dynamical properties- DCMMP / Contrôle de propriétés dynamiques - DPMCM

Speaker

Prof. Sree Ram Valluri (University of Western Ontario)

Description

There is substantial interest in enhancing the Figure of Merit of thermoelectric materials in their applications to diverse fields such as energy and environmental studies [1,2]. The relationship between thermal and electrical conductivities is often described by the empirical Wiedemann-Franz law. Improvisations beyond this law have been found to be necessary to extend its scope to broader regimes. In the present work, we examine the roots of the extremization equations in thermoelectrics that result from optimization of the figure of merit using the polylogarithm functions of a complex variable [3]. Specifically, we study the roots of the Polylogarithms Lir(z)=0 for arbitrary index r, which can be both real or complex. The solutions can be exploited to improve the Figure of Merit of thermoelectric materials, and also to propose a modification of the Wiedemann-Franz law based on our findings. The use of the polylogarithm functions for maximizing the Figure of Merit will provide a valuable approach that complements numerical solutions in the literature. [1] Thermoelectric and thermomagnetic methods of energy conversion. Professor A.G. Samoylovich course of lectures - Chemivtsi: Ruta, 228 (2006). [2] A.A. Snarskii, M.I. Zheinirovskii, and I.V. Bezsudnov http://arxiv.org/ftp/arxiv/papers/1109/1109.1585.pdf [3] Muralikrishna Molli, K. Venkataramaniah, and S.R. Valluri, Can. J. Phys. 89: 1171-1178 (2011).

Primary author

Prof. Sree Ram Valluri (University of Western Ontario)

Co-authors

Dr John Drozd (University of Western Ontario) Dr Ken Roberts (University of Western Ontario) Prof. Muralikrishna Molli (Sri Sathya Sai Institute of Higher Learning) Prof. Pranawa Deshmukh (Indian Institute of Technology, Madras, Chennai - 600036; Jain University, Bangalore - 560011, India.) Dr Shanthi Rao (Jain University, Bangalore - 560011, India.) Prof. Venkataramaniah Kamisetty (Sri Sathya Sai Institute of Higher Learning)

Presentation Materials