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Tunable coulomb blockade and giant coulomb blockade magnetoresistance in a double quantum dot system
Author(s) -
Zhang X.G.,
Xiang T.
Publication year - 2012
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.23196
Subject(s) - coulomb blockade , quantum tunnelling , quantum dot , condensed matter physics , magnetoresistance , physics , magnetic field , electron , blockade , coupling (piping) , coulomb , chemistry , quantum mechanics , materials science , voltage , receptor , biochemistry , transistor , metallurgy
We propose a Hubbard model to describe the tunneling effect of electrons in a double quantum dot system connected in the parallel circuit configuration to electrodes. The change in the interdot coupling is shown to dramatically influence the Coulomb blockade (CB) properties. For magnetic double dots, the interdot coupling can be tuned by the external magnetic field, leading to a giant CB magnetoresistance. Possible detection of this effect in organic magnetic molecular systems is discussed. © 2011 Wiley Periodicals, Inc. Int J Quantum Chem, 2012