Accession Number : ADA264818


Title :   Spatially Separated Electron-Hole Layers in Strong Magnetic Fields


Corporate Author : TENNESSEE UNIV KNOXVILLE DEPT OF PHYSICS


Personal Author(s) : Chen, X M ; Quinn, J J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264818.pdf


Report Date : Jan 1991


Pagination or Media Count : 14


Abstract : Studies of the collective excitation of two spatially separated electron and hole layers in strong magnetic fields indicate that the system undergoes a phase transition when the layer separation is larger than a critical value. Using the Hartree-Fock approximation, we find that this transition generates a novel excitonic density wave state, which has a lower energy than either a homogenous exciton fluid or a double charge-density wave state. The order parameters of the state satisfy a sum rule similar to that of a charge- density wave state in a two-dimensional electron system. A possible connection between the new state and a recent experimental result is discussed.


Descriptors :   *MAGNETIC FIELDS , *HOLES(ELECTRON DEFICIENCIES) , *HARTREE FOCK APPROXIMATION , TWO DIMENSIONAL , CHARGE DENSITY , STATISTICAL ANALYSIS


Subject Categories : Electricity and Magnetism
      Nuclear Physics & Elementary Particle Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE