Thermodynamic Signature of a Two-Dimensional Metal-Insulator Transition

Details Thermodynamic Signature of a Two-Dimensional Metal-Insulator Transition Thermodynamic Signature of a Two-Dimensional Metal-Insulator Transition

1999-09-21

arxiv.org/abs/cond-mat/9909314v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, submitted to Physical Review Letters; version 1 is identical to version 2 but didn't compile properly

Scientific paper

10.1103/PhysRevLett.84.4689

We present a study of the compressibility, K, of a two-dimensional hole system which exhibits a metal-insulator phase transition at zero magnetic field. It has been observed that dK/dp changes sign at the critical density for the metal-insulator transition. Measurements also indicate that the insulating phase is incompressible for all values of B. Finally, we show how the phase transition evolves as the magnetic field is varied and construct a phase diagram in the density-magnetic field plane for this system.

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