TY  - THES
AB  - At a total filling factor of one two closely-spaced two-dimensional electron systems (2DES) can be viewed as a Bose-Einstein condensate of excitons, where electrons from one 2DES couple to vacant states from the other 2DES. The pairing of electrons and holes (i.e., excitons) is mediated by Coulomb interactions. In this thesis this excitonic state was investigated by interlayer tunneling and Coulomb drag experiments. The Coulomb drag experiments on Corbino ring structures have shown a minimum in the conductivity, implying an energy gap at the Fermi energy due to exciton condensation. The tunneling experiments revealed a critical behavior and an I/V curve reminiscent of the Josephson effect of superconductivity.
DA  - 2008
KW  - Exziton
KW  - Quanten-Hall-Effekt
KW  - Tunneleffekt
KW  - Coulomb-Wechselwirkung
KW  - Bose-Einstein-Kondensation
KW  - Drag-Effekt
KW  - Pseudospin
KW  - Isospin
KW  - Supraleitung
KW  - Totaler Füllfaktor 1
KW  - Zweidimensionales Elektronengas
KW  - Corbino-Ring
KW  - Total filling factor 1
KW  - Two-dimensional electron system (2DES)
KW  - Corbino ring
KW  - Exciton condensation
KW  - Coulomb drag
KW  - Interlayer tunneling
LA  - eng
PY  - 2008
TI  - Phase coherence in the regime of bilayer exciton condensation
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:361-13682
Y2  - 2024-11-24T18:14:57
ER  -