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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:1906.09499 (cond-mat)
[Submitted on 22 Jun 2019]

Title:Electron-hole superfluidity controlled by a periodic potential

Authors:O.L. Berman, R.Ya. Kezerashvili, Y.E. Lozovik, K.G. Ziegler
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Abstract:We propose to control of an electron-hole superfluid in semiconductor coupled quantum wells and double layers of two-dimensional (2D) material by an external periodic field. This can either be created by the gates periodically located and attached to the quantum wells or double layers of 2D material or by the Moiré pattern of two twisted layers. The dependence of the electron-hole pairing order parameter on the temperature, the charge carrier density, and the gate parameters is obtained by minimization of the mean-field free energy. The second order phase transition between superfluid and electron-hole plasma, controlled by the external periodic gate field, is analyzed for different parameters.
Comments: 10 pages, 4 figures
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Cite as: arXiv:1906.09499 [cond-mat.mes-hall]
  (or arXiv:1906.09499v1 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.1906.09499
Journal reference: Phys. Rev. B 100, 134514 (2019)
Related DOI: https://doi.org/10.1103/PhysRevB.100.134514

Submission history

From: Klaus Ziegler [view email]
[v1] Sat, 22 Jun 2019 20:28:39 UTC (1,260 KB)
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