Contribution of Berry Curvature to Thermoelectric Effects

2014/02/03 by Yo Pierre Mizuta, Mizuta, Yo Pierre, Fumiyuki Ishii +1 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall

paper · pdf · doi:10.48550/arxiv.1402.0535

Comments: 6 pages, SCES2013, accepted for publication in JPS Conf. Proc

arxiv created 2014/02/03 · arxiv updated 2014/02/05

Abstract

Within the semiclassical Boltzmann transport theory, the formula for Seebeck coefficient S is derived for an isotropic two-dimensional electron gas (2DEG) system that exhibits anomalous Hall effect (AHE) and anomalous Nernst effect (ANE) originating from Berry curvature on their bands. Deviation of S from the value S₀ estimated neglecting Berry curvarture is computed for a special case of 2DEG with Zeeman and Rashba terms. The result shows that, under certain conditions the contribution of Berry curvature to Seebeck effect could be non-negligible. Further study is needed to clarify the effect of additional contributions from mechanisms of AHE and ANE other than pure Berry curvature.

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