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Quantum Interference between Impurities: Creating Novel Many-Body States in s-wave Superconductors

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Type
Preprint
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Submission Date
Identifiers
DOI: 10.1103/PhysRevB.67.020502
arXiv ID: cond-mat/0205328
Source
arXiv
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Abstract

We demonstrate that quantum interference of electronic waves that are scattered by multiple magnetic impurities in an s-wave superconductor gives rise to novel bound states. We predict that by varying the inter-impurity distance or the relative angle between the impurity spins, the states' quantum numbers, as well as their distinct frequency and spatial dependencies, can be altered. Finally, we show that the superconductor can be driven through multiple local crossovers in which its spin polarization, $<s_z >$, changes between $<s_z >=0, 1/2$ and 1.

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