Bose-Einstein condensation of trapped polaritons in two-dimensional electron-hole systems in a high magnetic field

Journal Article · Tue Sep 15 00:00:00 EDT 2009 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.80.115302· OSTI ID:21294340

Berman, Oleg L ^[1]; Kezerashvili, Roman Ya ^[1]; Lozovik, Yurii E ^[2]

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1. Physics Department, New York City College of Technology, City University of New York, Brooklyn, New York 11201 (United States)
2. Institute of Spectroscopy, Russian Academy of Sciences, 142190 Troitsk, Moscow Region (Russian Federation)

The Bose-Einstein condensation (BEC) of magnetoexcitonic polaritons (magnetopolaritons) in two-dimensional (2D) electron-hole system embedded in a semiconductor microcavity in a high magnetic field B is predicted. There are two physical realizations of 2D electron-hole system under consideration: a graphene layer and quantum well (QW). A 2D gas of magnetopolaritons is considered in a planar harmonic potential trap. Two possible physical realizations of this trapping potential are assumed: inhomogeneous local stress or harmonic electric field potential applied to excitons and a parabolic shape of the semiconductor cavity causing the trapping of microcavity photons. The effective Hamiltonian of the ideal gas of cavity polaritons in a QW and graphene in a high magnetic field and the BEC temperature as functions of magnetic field are obtained. It is shown that the effective polariton mass M{sub eff} increases with magnetic field as B{sup 1/2}. The BEC critical temperature T{sub c}{sup (0)} decreases as B{sup -1/4} and increases with the spring constant of the parabolic trap. The Rabi splitting related to the creation of a magnetoexciton in a high magnetic field in graphene and QW is obtained. It is shown that Rabi splitting in graphene can be controlled by the external magnetic field since it is proportional to B{sup -1/4} while in a QW the Rabi splitting does not depend on the magnetic field when it is strong.

• OSTI ID: 21294340
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 80, Issue 11; Other Information: DOI: 10.1103/PhysRevB.80.115302; (c) 2009 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
CARBON
CRITICAL TEMPERATURE
ELECTRIC FIELDS
ELECTRON-HOLE COUPLING
EXCITONS
HAMILTONIANS
HARMONIC POTENTIAL
LAYERS
MAGNETIC FIELDS
MASS
NANOSTRUCTURES
PHOTONS
POLARONS
QUANTUM DOTS
QUANTUM WELLS
SEMICONDUCTOR MATERIALS
STRESSES
THIN FILMS
TRAPPING
TRAPS
TWO-DIMENSIONAL CALCULATIONS