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

Journal Article · · Physical Review Letters
 [1];  [1];  [2];  [3];  [1];  [1]
  1. Univ. at Buffalo, NY (United States)
  2. Inst. for Basic Science, Daejeon (Korea, Republic of)
  3. 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.

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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Figures / Tables (3)


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