Abstract
Transmission coefficient through a quantum dot, which contains two Orbitals, is calculated in the weak-tunneling regime, taking into account the Coulomb interaction within the dot. Transmitted waves through these orbitals acquire phase shifts which differ by π from each other in the present model. The transmission coefficient as a function of gate voltage exhibits symmetric and asymmetric line shapes, depending on temperature T. A nearly symmetric line shape appears in the temperature region of 0.05 ≲ kBT/δ ≲ 0.25, where δ is the single-particle energy level separation in the dot. This behavior is understood by a combined action of the above-mentioned phase difference and the Coulomb interaction. A possibility that this mechanism explains the recent experiment is suggested.
Original language | English |
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Pages (from-to) | 1963-1965 |
Number of pages | 3 |
Journal | Japanese Journal of Applied Physics, Part 2: Letters |
Volume | 40 |
Issue number | 3 B |
DOIs | |
Publication status | Published - 2001 |
Externally published | Yes |
Keywords
- Aharonov-bohm effect
- Electron correlation
- Interference between orbitals
- Quantum dot
- Spin flip
- Transmission coefficient
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)