Speaker
Description
We have predicted in an electron-hole bilayer semiconductor system using a variational approach, a transition from an exciton superfluid to an incompressible “Chester supersolid”, which has occupancy of one on each lattice site [1].
By solving the full Gross-Pitaevskii equation for this 2D system, we carry out a complete investigation of the time-dependent dynamic exciton supersolid. Here, the interaction between the excitons is purely repulsive and dipolar-like, in marked contrast with ultracold dipolar gases, where the stability is driven by an additional effective attractive interaction[2]. We extend the Gross-Pitaevskii formalism to include the strong two-particle correlations[3], and to exclude the self-interaction energy which is absent for one-particle occupancy per supersolid site[4].
We present solutions of the Gross-Pitaevskii equation for a range of accessible experimental parameters which are the electron-hole layer separation and the exciton density.
References
[1]S. Conti, A. Perali, A. R. Hamilton, M. V. Milošević, F. M. Peeters, and D. Neilson, Phys. Rev. Lett. 130, 057001 (2023).
[2] A. Alaña, I. L. Egusquiza, and M. Modugno, Phys. Rev. A 108, 033316 (2023).
[3] G. E. Astrakharchik, J. Boronat, I. L. Kurbakov, and Yu. E. Lozovik, Phys. Rev. Lett. 98, 060405 (2007).
[4] P. W. Anderson, J. Low Temp. Phys. 169, 124–132 (2012).
