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EPSRC Reference: GR/K15619/01
Title: THEORY OF CORRELATION EFFECTS IN COUPLED, LAYERED ELECTRON AND HOLE SYSTEMS IN A MAGNETIC FIELD
Principal Investigator: Johnson, Professor N
Other Investigators:
Nicopoulos, Dr V
Researcher Co-Investigators:
Project Partners:
Department: Oxford Physics
Organisation: University of Oxford
Scheme: Standard Research (Pre-FEC)
Starts: 01 November 1994 Ends: 31 July 1998 Value (£): 107,994
EPSRC Research Topic Classifications:
Condensed Matter Physics
EPSRC Industrial Sector Classifications:
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Panel History:  
Summary on Grant Application Form
This project investigates correlation effects in coupled, layered electron-hole systems in a magnetic field, with the objective of interpreting experimental data on two physical realisations of such systems being studied in Oxford and internationally: 1) photoluminescence in semiconductor heterostructures containing a two-dimensional electron gas at high magnetic field and a (spatially-separate) photo-excited hole gas. 2) cyclotron and magneto-oscillation measurements in charge transfer salts containing layers of quasi-one-dimensional electrons and quasi-two-dimensional holes. Before attempting to interpret experimental data, we will need to investigate the generic properties of coupled, layered electron-hole systems in their own right. In particular we will investigate the interplay of cyclotron (kinetic) energy an band structure effects in the presence of three types of many-body interaction: electron-electron, electron-hole and even hole-hole. We will employ two complementary approaches: (a) cluster-model calculations for electrons and holes. In particular, solutions will be sought of model Hamiltonians derived directly from the Schrodinger equation fro N interacting electrons and holes in restricted geometries (b) develop approximate solutions of various phenomenological many-body Hamiltonians based, among others, on Hubbard-type models, and effective Langrangians involving order parameters.
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Organisation Website: http://www.ox.ac.uk