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Electron-hole superfluidity controlled by a periodic potential

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Title: Electron-hole superfluidity controlled by a periodic potential
Authors: Berman, O. L., Kezerashvili, R. Ya., Lozovik, Y. E., Ziegler, K. G.
Source: Phys. Rev. B 100, 134514 (2019)
Publication Year: 2019
Collection: Condensed Matter
Subject Terms: Condensed Matter - Mesoscale and Nanoscale Physics
More Details: 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 Moir\'e 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.
Comment: 10 pages, 4 figures
Document Type: Working Paper
DOI: 10.1103/PhysRevB.100.134514
Access URL: http://arxiv.org/abs/1906.09499
Accession Number: edsarx.1906.09499
Database: arXiv
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  Data: Phys. Rev. B 100, 134514 (2019)
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  Data: 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 Moir\'e 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.<br />Comment: 10 pages, 4 figures
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