Role of alternance symmetry in magnetoconductance
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INVESTIGACIONMetadata
Title
Role of alternance symmetry in magnetoconductanceDate
2014Publisher
American Physical SocietyISSN
1098-0121; 1550-235XType
info:eu-repo/semantics/articlePublisher version
http://journals.aps.org/prb/pdf/10.1103/PhysRevB.89.155428Version
info:eu-repo/semantics/publishedVersionAbstract
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)Rights
©2014 American Physical Society
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