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In the presence of order parameter suppression there is an additional anomalous scattering potential (due to the change in the gap parameter) around the location of the impurity. However, the strength of this anomalous scattering potential is bounded above by the maximal pairing gap in the bulk. Since the scalar potential is much stronger its effects dominate. We have done extensive calculations where there are both scalar and anomalous scattering potentials. The above statement has been checked carefully
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In the presence of order parameter suppression there is an additional anomalous scattering potential (due to the change in the gap parameter) around the location of the impurity. However, the strength of this anomalous scattering potential is bounded above by the maximal pairing gap in the bulk. Since the scalar potential is much stronger its effects dominate. We have done extensive calculations where there are both scalar and anomalous scattering potentials. The above statement has been checked carefully.
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We have investigated the asymmetry of the (±1,±1) direction Fourier peaks upon bias reversal further. We find such asymmetry depends on the detailed quasiparticle dispersion. For example, by setting all the (Formula presented) except (Formula presented) to zero we find the asymmetry disappears. Thus we conclude that we must investigate the issue of the plus/minus bias voltage asymmetry of the (±1,±1) direction Fourier peaks further
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We have investigated the asymmetry of the (±1,±1) direction Fourier peaks upon bias reversal further. We find such asymmetry depends on the detailed quasiparticle dispersion. For example, by setting all the (Formula presented) except (Formula presented) to zero we find the asymmetry disappears. Thus we conclude that we must investigate the issue of the plus/minus bias voltage asymmetry of the (±1,±1) direction Fourier peaks further.
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S. A. Kivelson (private communication).
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