Excitonic condensation in a symmetric electron-hole bilayer |
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Authors: | De Palo S Rapisarda F Senatore Gaetano |
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Affiliation: | INFM-Istituto Nazionale di Fisica della Materia, Unità di Trieste, Strada Costiera 11, 34014 Trieste, Italy. |
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Abstract: | Using diffusion Monte Carlo simulations we have investigated the ground state of a symmetric electron-hole bilayer and determined its phase diagram at T = 0. We find clear evidence of an excitonic condensate, whose stability however is affected by an in-layer electronic correlation. This stabilizes the electron-hole plasma at large values of the density or interlayer distance, and the Wigner crystal at low density and large distance. We have also estimated pair correlation functions and low-order density matrices to give a microscopic characterization of correlations as well as to try and estimate the condensate fraction. |
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