skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: General Conditions for Proximity-Induced Odd-Frequency Superconductivity in Two-Dimensional Electronic Systems

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1258722
Grant/Contract Number:
BES E304
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 25; Related Information: CHORUS Timestamp: 2016-06-23 11:09:53; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Triola, Christopher, Badiane, Driss M., Balatsky, Alexander V., and Rossi, E. General Conditions for Proximity-Induced Odd-Frequency Superconductivity in Two-Dimensional Electronic Systems. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.116.257001.
Triola, Christopher, Badiane, Driss M., Balatsky, Alexander V., & Rossi, E. General Conditions for Proximity-Induced Odd-Frequency Superconductivity in Two-Dimensional Electronic Systems. United States. doi:10.1103/PhysRevLett.116.257001.
Triola, Christopher, Badiane, Driss M., Balatsky, Alexander V., and Rossi, E. 2016. "General Conditions for Proximity-Induced Odd-Frequency Superconductivity in Two-Dimensional Electronic Systems". United States. doi:10.1103/PhysRevLett.116.257001.
@article{osti_1258722,
title = {General Conditions for Proximity-Induced Odd-Frequency Superconductivity in Two-Dimensional Electronic Systems},
author = {Triola, Christopher and Badiane, Driss M. and Balatsky, Alexander V. and Rossi, E.},
abstractNote = {},
doi = {10.1103/PhysRevLett.116.257001},
journal = {Physical Review Letters},
number = 25,
volume = 116,
place = {United States},
year = 2016,
month = 6
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevLett.116.257001

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

Save / Share:
  • We theoretically study the vortex matter structure in low-dimensional systems with superconducting order induced by proximity to a bulk superconductor. We analyze the effects of microscopic coupling mechanisms between the two systems and the effects of possible mismatch in the band structures of these materials on the energy spectrum of vortex-core electrons. The unusual structure of vortex cores is discussed in the context of recent tunneling microscopy/spectroscopy experiments.
  • It is shown that the parity-violated ground state of two-dimensional strongly correlated electronic systems (commensurate flux state) provides a physical realization of the anyon mechanism of superconductivity. The electromagnetic response of the commensurate flux state is calculated. It is found that the superconducting ground state is accompanied by the {ital restoration} of parity and time-reversal symmetry: the parity-violation signal is very small at low energies and momentum, and vanishes in the static limit as well as in the uniform limit.
  • A systematic study is reported of the proximity effect in superconductivity of thick Cu layers (4 less than or equal to d/sub n/ less than or equal to 105 ..mu..m) in contact with Nb or Nb-Ti (46 less than or equal to D/sub s/ less than or equal to 1041 ..mu..m) from measurements of the ac susceptibility and of the thermal conductivity. The induced superconducting properties of Cu are studied as a function of temperature (7 mK less than or equal to T less than or equal to 1 K), field (0.4 mG less than or equal to H lessmore » than or equal to 10G), and electronic mean free path (0.2 less than or equal to l less than or equal to 14 ..mu..m). The Meissner screening length in Cu increases faster than the coherence length with decreasing temperature and eventually saturates, making the Cu fully superconducting. In this case, superconductivity can be destroyed sharply at a breakdown field H/sub b/; the transition at H/sub b/ is hysteretic. The data are in agreement with numerical solutions of the de Gennes/Ginzburg-Landau theory, as demonstrated by the dependence of the Meissner screening length and of the breakdown field on temperature, field, and electronic mean free path. The data indicate that observation of a reduction in thermal conductivity requires a substantially larger induced pair potential than is necessary even for total field shielding. The concentration of Cooper pairs in Cu in contact to Nb is larger than in Cu in contact to Nb-Ti, even for Nb-Ti/Cu samples with a larger electron mean free path in the Cu part. No measurable superconducting field screening could be induced in the investigated temperature range in Pd(26 less than or equal to d/sub n/ less than or equal to 72 ..mu..m) in contact to Nb/Cu or to Nb (D/sub s/ approx. = 5d/sub n/). This is explained by the fact that the coherence length is at least an order of magnitude smaller in Pd than in Cu. Evaporating a layer of Fe on Cu in the Nb/Cu samples results in a strong depression of the proximity effect.« less
  • A theoretical study of the proximity effect between superposed superconducting and itinerant electron antiferromagnetic films is presented. The model is based on the McMillan approach to a weakly coupled normal metal/superconductor bilayer. The spectra of one-particle excitations in the contacting films have been calculated and pronounced subgap features in the tunneling conductance of the bilayer are obtained. Implications of the present results for the antiferromagnetic metal/conventional superconductor junctions are discussed as well.