Gap States in Dilute Magnetic Alloy Superconductors

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.3621· OSTI ID:388421

Chung, W; Jarrell, M ^[1]

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1. Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221-0011 (United States)

We study states in the superconducting gap induced by magnetic impurities using self-consistent quantum Monte Carlo with maximum entropy and formally exact analytic continuation methods. The magnetic impurity susceptibility has different characteristics for {ital T}{sub 0}{approx_lt}{ital T}{sub {ital c}0} and {ital T}{sub 0}{approx_gt}{ital T}{sub {ital c}0} ({ital T}{sub 0}: Kondo temperature, {ital T}{sub {ital c}0}: superconducting transition temperature) due to the crossover between a doublet and a singlet ground state. We systematically study the location and the weight of the gap states and the gap parameter as a function of {ital T}{sub 0}/{ital T}{sub {ital c}0} and the concentration of the impurities. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 388421
• Journal Information: Physical Review Letters, Vol. 77, Issue 17; Other Information: PBD: Oct 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
SUPERCONDUCTORS
ENERGY GAP
MAGNETIC MATERIALS
MAGNETIC SUSCEPTIBILITY
IMPURITIES
MONTE CARLO METHOD
KONDO EFFECT
ENTROPY
DILUTE ALLOYS