Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session F60: Correlated States I
8:00 AM–10:36 AM,
Tuesday, March 15, 2022
Room: Hyatt Regency Hotel -DuSable C
Chair: Andrey Baydin, Rice University
Abstract: F60.00009 : Exciton supersolid of spatially indirect exciton in bilayer semiconductor devices.*
10:00 AM–10:12 AM
Presenter:
Sara Conti
(Department of Physics, University of Antwerp, 2020 Antwerp, Belgium)
Authors:
Sara Conti
(Department of Physics, University of Antwerp, 2020 Antwerp, Belgium)
David Neilson
(Department of Physics, University of Antwerp, 2020 Antwerp, Belgium)
Andrea Perali
(School of Pharmacy, University of Camerino, 62032 Camerino (MC), Italy)
Francois M Peeters
(Department of Physics, University of Antwerp, 2020 Antwerp, Belgium)
Superfluid condensation of excitons has been predicted and demonstrated in bilayer semiconductors for small layer separations [2-5]. At larger layer separations with stronger dipolar interactions, a phase transition to an exciton crystal has been predicted [6].
Using a variational approach, we are able to identify a region in phase space at intermediate layer separations, where a supersolid phase is stable relative to both the exciton crystal and superfluid phases. In the supersolid phase, translational symmetry of the exciton crystal and the phase coherence of the exciton condensate are simultaneously preserved.
[1] G. V. Chester Phys. Rev. A 2 256 (1970)
[2] A. Perali, et al. Phys. Rev. Lett. 110, 146803 (2013)
[3] S. Conti, et al. Phys. Rev. B 101, 220504(R) (2020).
[4] G. W. Burg, et al. Phys. Rev. Lett. 120, 177702 (2018)
[5] Z. Wang, et al. Nature 574, 76 (2019).
[6] G. E. Astrakharchik, et al. Phys. Rev. Lett. 98, 060405 (2007)
*This work is supported by the Flemish Science Foundation (FWO-Vl).
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