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Title: Bose-Einstein condensation and superfluidity of magnetoexcitons in bilayer graphene

Abstract

We propose experiments to observe Bose-Einstein condensation and superfluidity of quasi-two-dimensional spatially indirect magnetoexcitons in two-layer graphene. The energy spectrum of collective excitations, the sound spectrum, and the effective magnetic mass of magnetoexcitons are presented in the strong magnetic field regime. The superfluid density n{sub S} and the temperature of the Kosterlitz-Thouless phase transition T{sub c} are shown to be increasing functions of the excitonic density n but decreasing functions of B and the interlayer separation D.

Authors:
 [1];  [2];  [3]
  1. Physics Department, New York City College of Technology of the City University of New York, 300 Jay Street, Brooklyn, New York 11201 (United States)
  2. Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, 142190 Moscow Region (Russian Federation)
  3. Department of Physics and Astronomy, Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10021 (United States)
Publication Date:
OSTI Identifier:
21143286
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 77; Journal Issue: 15; Other Information: DOI: 10.1103/PhysRevB.77.155433; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BOSE-EINSTEIN CONDENSATION; COLLECTIVE EXCITATIONS; DENSITY; EFFECTIVE MASS; ENERGY SPECTRA; EXCITONS; GRAPHITE; LAYERS; MAGNETIC FIELDS; PHASE TRANSFORMATIONS; SOUND WAVES; SUPERFLUIDITY; TRANSITION TEMPERATURE; TWO-DIMENSIONAL CALCULATIONS

Citation Formats

Berman, Oleg L, Lozovik, Yurii E, and Gumbs, Godfrey. Bose-Einstein condensation and superfluidity of magnetoexcitons in bilayer graphene. United States: N. p., 2008. Web. doi:10.1103/PHYSREVB.77.155433.
Berman, Oleg L, Lozovik, Yurii E, & Gumbs, Godfrey. Bose-Einstein condensation and superfluidity of magnetoexcitons in bilayer graphene. United States. https://doi.org/10.1103/PHYSREVB.77.155433
Berman, Oleg L, Lozovik, Yurii E, and Gumbs, Godfrey. Tue . "Bose-Einstein condensation and superfluidity of magnetoexcitons in bilayer graphene". United States. https://doi.org/10.1103/PHYSREVB.77.155433.
@article{osti_21143286,
title = {Bose-Einstein condensation and superfluidity of magnetoexcitons in bilayer graphene},
author = {Berman, Oleg L and Lozovik, Yurii E and Gumbs, Godfrey},
abstractNote = {We propose experiments to observe Bose-Einstein condensation and superfluidity of quasi-two-dimensional spatially indirect magnetoexcitons in two-layer graphene. The energy spectrum of collective excitations, the sound spectrum, and the effective magnetic mass of magnetoexcitons are presented in the strong magnetic field regime. The superfluid density n{sub S} and the temperature of the Kosterlitz-Thouless phase transition T{sub c} are shown to be increasing functions of the excitonic density n but decreasing functions of B and the interlayer separation D.},
doi = {10.1103/PHYSREVB.77.155433},
url = {https://www.osti.gov/biblio/21143286}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 15,
volume = 77,
place = {United States},
year = {2008},
month = {4}
}