Suppression of superconductivity by two-channel Kondo impurities

Journal Article · Wed Nov 30 23:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.15864· OSTI ID:7093960

Luk, K ^[1]; Jarrell, M ^[2]; Cox, D L ^[3]

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1. Centre of Computing Services and Telecommunications, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon (Hong Kong) Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
2. Department of Physics, ML-0011, University of Cincinnati, Cincinnati, Ohio 25221-0011 (United States)
3. Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)

We have performed a calculation on the change of the critical temperature [ital T][sub [ital c]] of a superconducting host with respect to the change of the concentration [ital c] of two-channel Kondo impurities in the limit of vanishing [ital c]. [ital T][sub [ital c]] suppressions are found for both spin-singlet flavor-triplet and spin-triplet flavor-singlet pairings for temperatures as low as [ital T][sub [ital K]]/[ital T][sub [ital c]0][gt]1, where [ital T][sub [ital K]] and [ital T][sub [ital c]0] are the Kondo temperature and the critical temperature of the host in the absence of impurities, respectively. The suppression is much larger for the spin-singlet flavor-triplet pairing. We also found empirically that ([partial derivative][ital T][sub [ital c]]/[partial derivative][ital c])[sub [ital c]=0] can be expressed as a product of two functions [ital g]([ital T][sub [ital K]]/[ital T]) and [ital f]([lambda][sub 0],[omega][sub 0]), where [lambda][sub 0] and [omega][sub 0] are electron phonon coupling and Einstein frequency, respectively.

• OSTI ID: 7093960
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:21; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCULATION METHODS
COMPUTERIZED SIMULATION
GORKOV-ELIASHBERG THEORY
IMPURITIES
KONDO EFFECT
MONTE CARLO METHOD
PHYSICAL PROPERTIES
SIMULATION
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE