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Overhauser field‐induced electron transport through weakly coupled double quantum dots
Author(s) -
Iñarrea Jesús,
MacDonald Allan H.,
LopezMonis Carlos,
Platero Gloria
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200778108
Subject(s) - quantum dot , quantum tunnelling , physics , condensed matter physics , magnetic field , hyperfine structure , spin (aerodynamics) , coulomb blockade , electron , bistability , field (mathematics) , singlet state , atomic physics , quantum mechanics , voltage , mathematics , transistor , pure mathematics , thermodynamics , excited state
In this work the tunneling current through a weakly coupled double quantum dot in an external magnetic field is analyzed. We propose a model which includes Hyperfine interaction. The time evolution for electronic charge occupations and for the nuclei polarizations in each dot is obtained by means of rate equations which are self‐consistently solved. We analyze the current in the spin blockade region as a function of magnetic field and observe hysteretic behavior for magnetic fields corresponding to the crossings between triplet and singlet states. Bistability is also produced for the induced nuclei spin polarizations within each quantum dot. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)