Physical Review B, volume 98, issue 18, publication number 184510

Enhancing superconductivity by disorder

Publication typeJournal Article
Publication date2018-11-19
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.7
ISSN24699950, 24699969, 10980121, 1550235X
Abstract
We study two mechanisms for enhancing the superconducting transition temperature Tc by nonmagnetic disorder in both conventional (sign-preserving gaps) and unconventional (sign-changing gaps) superconductors (SC). In the first scenario, relevant to multi-band systems in the dilute impurity limit of both conventional and unconventional SC, we demonstrate how favorable density of states enhancements driven by resonant states in off-Fermi-level bands, lead to significant enhancements of Tc in the condensate formed by the near-Fermi-level bands. The second scenario focuses on the dense impurity limit where random disorder-generated local density of states modulations cause a boosted Tc for conventional SC with short coherence lengths. We analyze the basic physics of both mechanisms within simplified models, and discuss the relevance to existing materials.

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Gastiasoro M. N., ANDERSEN B. L. Enhancing superconductivity by disorder // Physical Review B. 2018. Vol. 98. No. 18. 184510
GOST all authors (up to 50) Copy
Gastiasoro M. N., ANDERSEN B. L. Enhancing superconductivity by disorder // Physical Review B. 2018. Vol. 98. No. 18. 184510
RIS |
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RIS Copy
TY - JOUR
DO - 10.1103/PhysRevB.98.184510
UR - https://doi.org/10.1103/PhysRevB.98.184510
TI - Enhancing superconductivity by disorder
T2 - Physical Review B
AU - Gastiasoro, Maria N.
AU - ANDERSEN, BRIAN L.
PY - 2018
DA - 2018/11/19
PB - American Physical Society (APS)
IS - 18
VL - 98
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
BibTex
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BibTex Copy
@article{2018_Gastiasoro,
author = {Maria N. Gastiasoro and BRIAN L. ANDERSEN},
title = {Enhancing superconductivity by disorder},
journal = {Physical Review B},
year = {2018},
volume = {98},
publisher = {American Physical Society (APS)},
month = {nov},
url = {https://doi.org/10.1103/PhysRevB.98.184510},
number = {18},
doi = {10.1103/PhysRevB.98.184510}
}
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