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

Lee, Y. -H.; Xiao, S.; Kim, K.  W.; Reno, J.  L.; Bird, J.  P.; Han, J.  E.

doi:10.1103/physrevlett.123.056802

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

Journal Article · 30 July 2019 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.123.056802 · OSTI ID:1593525

Lee, Y. -H. ^[1]; Xiao, S. ^[1]; Kim, K. W. ^[2]; Reno, J. L. ^[3]; Bird, J. P. ^[1]; Han, J. E. ^[1]

Univ. at Buffalo, NY (United States)
Inst. for Basic Science, Daejeon (Korea, Republic of)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Here 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 ($$\gg2e^2/h$$) 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.

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Research Organization:: State Univ. of New York (SUNY), Buffalo, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: FG02-04ER46180

OSTI ID:: 1593525

Alternate ID(s):: OSTI ID: 1545952

Journal Information:: Physical Review Letters, Vol. 123, Issue 5; Related Information: https://journals-aps-org.gate.lib.buffalo.edu/prl/supplemental/10.1103/PhysRevLett.123.056802/suppl.pdf; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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

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