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

Junren Shi and X. C. Xie
Phys. Rev. Lett. 88, 086401 – Published 6 February 2002
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Abstract

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 a disorder effect at low carrier densities.

  • Received 22 March 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.086401

©2002 American Physical Society

Authors & Affiliations

Junren Shi1 and X. C. Xie1,2

  • 1Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078
  • 2International Center for Quantum Structures and Institute of Physics, Chinese Academy of Sciences, Beijing, China

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Vol. 88, Iss. 8 — 25 February 2002

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