Thermodynamic Compressibility of a Two-Dimensional Electron System: Signature of a Droplet State

S. C. Dultz, B. Alavi, H. W. Jiang

We have used a field-penetration method to measure thermodynamic compressibility of a moderately interacting two-dimensional electron system ($r_s$ $\approx$ 0.5-3) in a three te…