Divergence of the effective mass in a strongly-interacting 2D electron system

Details Divergence of the effective mass in a strongly-interacting 2D electron system Divergence of the effective mass in a strongly-interacting 2D electron system

2011-11-30

arxiv.org/abs/1111.7238v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

The diffusion thermopower in a low-disorder, strongly-interacting 2D electron system in silicon increases with decreasing electron density and tends to infinity at a finite density $n_t$. Comparison with earlier data for a high-disorder silicon system indicates that the critical density $n_t$ does not depend on the degree of disorder. The increase of the thermopower is associated with a diverging electron mass in the close vicinity of an interaction-induced phase transition.

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