Role of alternance symmetry in magnetoconductance
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Role of alternance symmetry in magnetoconductanceData de publicació
2014Editor
American Physical SocietyISSN
1098-0121; 1550-235XTipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://journals.aps.org/prb/pdf/10.1103/PhysRevB.89.155428Versió
info:eu-repo/semantics/publishedVersionResum
We show that the direction of coherent electron transport across a cyclic system of quantum dots or a cyclic
molecule can be modulated by an external magnetic field if the cycle has an odd number of hopping sites, ... [+]
We show that the direction of coherent electron transport across a cyclic system of quantum dots or a cyclic
molecule can be modulated by an external magnetic field if the cycle has an odd number of hopping sites, but
the transport becomes completely symmetric if the number is even. These contrasting behaviors, which remain
in the case of interacting electrons, are a consequence of the absence or presence of alternance symmetry in the
system. These findings are relevant for the design of nanocircuits based on coupled quantum dots or molecular
junctions. [-]
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PHYSICAL REVIEW B 89, 155428 (2014)Drets d'accés
©2014 American Physical Society
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