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TT: Fachverband Tiefe Temperaturen

TT 14: Graphene

TT 14.5: Vortrag

Montag, 1. April 2019, 16:00–16:15, H22

Thermoelectric efficiency in three-terminal graphene nano-junctions — Zahra Sartipi¹, Amir Hayati², and •Javad Vahedi^1,3 — ¹Department of Physics, Sari Branch, Islamic Azad University, Sari, Iran — ²Faculty of Mazandaran Technical and Vocational University, Technical and Vocational University, Iran — ³Laboratoire de Physique Théorique et Modélisation, CNRS UMR 8089, Université de Cergy-Pontoise, France

The thermoelectric efficiency of a thermal machine consisting of a triangular graphene nano-junction connected to three electrodes in the linear response regime is studied. Using the Onsager formalism and a combination of semi-empirical tight-binding calculations as well as Greens function theory, the efficiency at maximum output power which can be written in terms of generalized figures of merit is investigated. The results for a set temperature and chemical potential parameters have shown that adding a third terminal improves the efficiency at maximum output power compared to the two-terminal setup.