Electronic States and Transport Phenomena in Quantum Dot Systems

Details Electronic States and Transport Phenomena in Quantum Dot Systems Electronic States and Transport Phenomena in Quantum Dot Systems

2001-01-23

arxiv.org/abs/cond-mat/0101345v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Review paper of our work, to appear in Proc. Int. Symp. on Formation, Physics and Device Application of Quantum Dot Structures

Scientific paper

10.1143/JJAP.40.1929

Electronic states and transport phenomena in semiconductor quantum dots are studied theoretically. Taking account of the electron-electron Coulomb interaction by the exact diagonalization method, the ground state and low-lying excited states are calculated as functions of magnetic field. Using the obtained many-body states, we discuss the temperature dependence of the conductance peaks in the Coulomb oscillation. In the Coulomb blockade region, elastic and inelastic cotunneling currents are evaluated under finite bias voltages. The cotunneling conductance is markedly enhanced by the Kondo effect. In coupled quantum dots, molecular orbitals and electronic correlation influence the transport properties.

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