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Title: Unconventional Cooper pairing results in a pseudogap-like phase in s-wave superconductors
Authors: Springer, Daniel
Cheong, Siew Ann
Keywords: Pseudogap
Strongly disordered superconductor
Pre-formed Cooper pairs
Renormalization group
High temperature superconductivity
Issue Date: 2015
Source: Springer, D., & Cheong, S. A. (2015). Unconventional Cooper pairing results in a pseudogap-like phase in s-wave superconductors. New Journal of Physics, 17, 103008-.
Series/Report no.: New Journal of Physics
Abstract: The impact of disorder on the superconducting (SC) pairing mechanism is the centre of much debate. Some evidence suggests a loss of phase coherence of pairs while others point towards the formation of a competing phase. In our work we show that the two perspectives may be different sides of the same coin. Using an extension of the perturbative renormalization group approach we compare the impact of different disorder-induced interactions on a SC ground state. We find that in the strongly disordered regime an interaction between paired fermions and their respective disordered environment replaces conventional Cooper pairing. For these unconventional Cooper pairs the phase coherence condition, required for the formation of a SC condensate, is not satisfied.
ISSN: 1367-2630
DOI: 10.1088/1367-2630/17/10/103008
Schools: School of Physical and Mathematical Sciences 
Rights: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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