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

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

2002-05-15

arxiv.org/abs/cond-mat/0205328v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.67.020502

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, $$, changes between $=0, 1/2$ and 1.

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