Bose-Einstein condensation and superfluidity of magnetoexcitons in bilayer graphene

Journal Article · Tue Apr 15 00:00:00 EDT 2008 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.77.155433· OSTI ID:21143286

Berman, Oleg L ^[1]; Lozovik, Yurii E ^[2]; Gumbs, Godfrey ^[3]

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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)

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.

• OSTI ID: 21143286
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 77, Issue 15; Other Information: DOI: 10.1103/PhysRevB.77.155433; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

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