Giant Zero Bias Anomaly due to Coherent Scattering from Frozen Phonon Disorder in Quantum Point Contacts

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Title
Giant Zero Bias Anomaly due to Coherent Scattering from Frozen Phonon Disorder in Quantum Point Contacts
Author(s)
Y.-H. Lee; S. Xiao; K. W. Kim; J. L. Reno; J. P. Bird; J. E. Han
Publication Date
2019-07
Journal
PHYSICAL REVIEW LETTERS, v.123, no.5, pp.056802 -
Publisher
AMER PHYSICAL SOC
Abstract
We demonstrate an unusual manifestation of coherent scattering for electron waves in mesoscopic quantum point contacts, in which fast electron dynamics allows the phonon system to serve as a quasistatic source of disorder. The low-temperature conductance of these devices exhibits a giant (≫ 2e2=h) zero bias anomaly (ZBA), the features of which are reproduced in a nonequilibrium model for coherent scattering from the “frozen” phonon disorder. According to this model, the ZBA is understood to result from the in situ electrical manipulation of the phonon disorder, a mechanism that could open up a pathway to the on- demand control of coherent scattering in the solid state.© 2019 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6143
ISSN
0031-9007
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
Files in This Item:
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