Ballistic electrons in an open square geometry: Selective probing of resonant-energy states
- Department of Physics and Measurement Technology, Linkoeping University, S-58183 Linkoeping (Sweden)
- Braun Center for Submicron Research, Weizmann Institute of Science, Rehovot 76100 (Israel)
- Festkoerperphysik, ETH Zuerich and PSI, 8093 Zuerich (Switzerland)
We report on the interplay between classical trajectories and quantum-mechanical effects in a square geometry. At low magnetic fields the four-terminal resistance is dominated by phenomena that depend on ballistic trajectories in a classical billiard. Superimposed on these classical effects are quantum interference effects manifested by highly periodic conductance oscillations. Numerical analysis shows that these oscillations are directly related to excitations of particular eigenstates in the square. In spite of open leads, transport through an open cavity is effectively mediated by just a few (or even a single) resonant-energy states. The leads injecting electrons into the cavity play a decisive role in a selection of the particular set of states excited in the dot. The above selection rule sets a specific frequency of the oscillations seen in the experiment. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 561610
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 55, Issue 16; Other Information: PBD: Apr 1997
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRON GAS
TRANSPORT THEORY
QUANTUM MECHANICS
TRAJECTORIES
ELECTRIC CONDUCTIVITY
MAGNETIC FIELDS
SELECTION RULES
GALLIUM ARSENIDES
ALUMINIUM ARSENIDES
TRANSMISSION
COMPUTERIZED SIMULATION
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
INTERFERENCE
SEMICONDUCTOR JUNCTIONS
semiconductor quantum dots