The Droplet State and the Compressibility Anomaly in Dilute 2D Electron Systems

Details The Droplet State and the Compressibility Anomaly in Dilute 2D Electron Systems The Droplet State and the Compressibility Anomaly in Dilute 2D Electron Systems

2001-03-26

arxiv.org/abs/cond-mat/0103541v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.88.086401

We investigate the space distribution of carrier density and the compressibility of two-dimensional (2D) electron systems by using the local density approximation. The strong correlation is simulated by the local exchange and correlation energies. A slowly varied disorder potential is applied to simulate the disorder effect. We show that the compressibility anomaly observed in 2D systems which accompanies the metal-insulator transition can be attributed to the formation of the droplet state due to disorder effect at low carrier densities.

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