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Quantum interference of a Zn impurity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>d</mml:mi></mml:mrow></mml:math>-wave superconductors
The local differential tunneling conductance on a Zn impurity in a disordered $d$-wave superconductor is studied. Quantum interference between many impurities leads to definitive quasiparticle spectra. We suggest that an elaborate analysis on impurity-induced spectra with quantum interference effects included may be able to pin down the sign and strength …