Correlation-induced resonances and population switching in a quantum dot coulomb valley

Details Correlation-induced resonances and population switching in a quantum dot coulomb valley Correlation-induced resonances and population switching in a quantum dot coulomb valley

2006-10-18

arxiv.org/abs/cond-mat/0610496v2

Phys. Rev. Lett. 98, 186805 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Fig. 4 and some technical details removed. To appear in PRL

Scientific paper

10.1103/PhysRevLett.98.186805

Strong correlation effects on electron transport through a spinless quantum dot are considered. When two single-particle levels in the quantum dot are degenerate, a conserved pseudospin degree of freedom appears for general tunneling matrix elements between the quantum dot and leads. Local fluctuations of the pseudospin in the quantum dot give rise to a pair of asymmetric conductance peaks near the center of a Coulomb valley. An exact relation to the population switching is provided.

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