Impurity Quantum Phase Transition in a Current-Carrying d-Wave Superconductor

Details Impurity Quantum Phase Transition in a Current-Carrying d-Wave Superconductor Impurity Quantum Phase Transition in a Current-Carrying d-Wave Superconductor

2008-04-27

arxiv.org/abs/0804.4263v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 6figures

Scientific paper

We study an Anderson impurity embedded in a d-wave superconductor carrying a non-zero momentum of Cooper pairs driven by magnetic flux through the Aharonov-Bohm effect. The zero-temperature impurity behavior is investigated by using the numerical renormalization group method in calculating the energy flows, the impurity spectral functions, and the effective magnetic moments. These results explicitly show that the local impurity state can be changed dramatically from the asymptotically free spin to the completely screened one by tuning the magnetic flux.

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