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Article: New type of Fano resonant tunneling via Anderson impurities in superlattice

TitleNew type of Fano resonant tunneling via Anderson impurities in superlattice
Authors
Issue Date2006
PublisherInstitute of Physics Publishing Ltd.. The Journal's web site is located at http://iopscience.iop.org/0295-5075
Citation
Europhysics Letters, 2006, v. 74 n. 5, p. 875-881 How to Cite?
AbstractThe spectrum of differential tunneling conductance in Si-doped GaAs/AlAs superlattice is measured at low electric fields. The conductance spectra feature a zero-bias peak and a low-bias dip at low temperatures. By taking into account the quantum interference between tunneling paths via superlattice miniband and via Coulomb blockade levels of impurities, we theoretically show that such a peak-dip structure is attributed to a Fano resonance where the peak always appears at the zero bias and the line shape is essentially described by a new function |ε̃|/|ε̄| + 1 with the asymmetry parameter q ≈ 0. As the temperature increases, the peak-dip structure fades out due to thermal fluctuations. Good agreement between experiment and theory enables us to distinguish the zero-bias resonance from the usual Kondo resonance. © EDP Sciences.
Persistent Identifierhttp://hdl.handle.net/10722/175018
ISSN
2015 Impact Factor: 1.963
2015 SCImago Journal Rankings: 0.565
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorXu, SJen_US
dc.contributor.authorXiong, SJen_US
dc.contributor.authorLiu, Jen_US
dc.contributor.authorZheng, HZen_US
dc.date.accessioned2012-11-26T08:48:47Z-
dc.date.available2012-11-26T08:48:47Z-
dc.date.issued2006en_US
dc.identifier.citationEurophysics Letters, 2006, v. 74 n. 5, p. 875-881en_US
dc.identifier.issn0295-5075en_US
dc.identifier.urihttp://hdl.handle.net/10722/175018-
dc.description.abstractThe spectrum of differential tunneling conductance in Si-doped GaAs/AlAs superlattice is measured at low electric fields. The conductance spectra feature a zero-bias peak and a low-bias dip at low temperatures. By taking into account the quantum interference between tunneling paths via superlattice miniband and via Coulomb blockade levels of impurities, we theoretically show that such a peak-dip structure is attributed to a Fano resonance where the peak always appears at the zero bias and the line shape is essentially described by a new function |ε̃|/|ε̄| + 1 with the asymmetry parameter q ≈ 0. As the temperature increases, the peak-dip structure fades out due to thermal fluctuations. Good agreement between experiment and theory enables us to distinguish the zero-bias resonance from the usual Kondo resonance. © EDP Sciences.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd.. The Journal's web site is located at http://iopscience.iop.org/0295-5075en_US
dc.relation.ispartofEurophysics Lettersen_US
dc.titleNew type of Fano resonant tunneling via Anderson impurities in superlatticeen_US
dc.typeArticleen_US
dc.identifier.emailXu, SJ: sjxu@hku.hken_US
dc.identifier.authorityXu, SJ=rp00821en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1209/epl/i2006-10035-7en_US
dc.identifier.scopuseid_2-s2.0-33745052683en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33745052683&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume74en_US
dc.identifier.issue5en_US
dc.identifier.spage875en_US
dc.identifier.epage881en_US
dc.identifier.isiWOS:000238029500019-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridXu, SJ=7404439005en_US
dc.identifier.scopusauthoridXiong, SJ=7202791585en_US
dc.identifier.scopusauthoridLiu, J=24335807800en_US
dc.identifier.scopusauthoridZheng, HZ=7403440708en_US

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