Giant field-induced variation of the cyclotron mass in coupled two-dimensional electron gases

Journal Article · Sat Apr 15 04:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.51.11160· OSTI ID:44627

Lyo, S K ^[1]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

The cyclotron mass {ital m}{sub {ital c}} is calculated in coupled double quantum wells with in-plane magnetic fields ({ital B}). The shape of the Fermi surface varies continuously due to the partial minigap formed by the {ital B}-induced anticrossing of the two quantum-well energy-dispersion curves. In two dimensions, {ital m}{sub {ital c}} is shown to be proportional to the density of states at the Fermi surface. Sharp {ital B}-dependent structures arising from abrupt orbit changes near the gap are obtained for {ital m}{sub {ital c}} in excellent agreement with recent data, confirming recently proposed Fermi surfaces. Additional effects are predicted.

• Research Organization: Sandia National Laboratory
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 44627
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 16 Vol. 51; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DISPERSION RELATIONS
EFFECTIVE MASS
ELECTRON GAS
ELECTRONIC STRUCTURE
ENERGY-LEVEL DENSITY
FERMI LEVEL
SEMICONDUCTOR MATERIALS
TWO-DIMENSIONAL CALCULATIONS