Rough Surface Effects on<i><i>d</i></i>-Wave Superconductors

Yamada, Kotaro; Nagato, Yasushi; Higashitani, Seiji; Nagai, Katsuhiko

doi:10.1143/jpsj.65.1540

Cited by 57 publications

(50 citation statements)

References 19 publications

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“…50 Unfortunately, we could not make clear a mechanism of splitting. Our conclusion, however, contradicts to those of a number of theories 51,52,53,54,55,56 based on the quasiclassical Green function method. 57,58,59,60,61 The drastic suppression of the ZBCP by the interfacial randomness is the common conclusion of all the theories.…”

Section: Introductioncontrasting

confidence: 99%

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Split of zero-bias conductance peak in normal-metal/d-wave superconductor junctions

2004

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Effects of impurity scatterings on the conductance in normal-metal / d wave superconductor junctions are discussed by using the single-site approximation. So far, the split of the zero-bias conductance peak has been believed to be an evidence of the broken time reversal symmetry states at the surface of high-Tc superconductors. In this paper, however, it is shown that the impurity scattering near the interface also causes the split of the zero-bias conductance peak. Typical conductance spectra observed in experiments at finite temperatures and under external magnetic fields are explained well by the present theory.

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Section: Introductioncontrasting

confidence: 99%

“…(45) is characterized by the number of impurities, a factor k F L s /π appears in Eq. (54). We choose L s k F = 20 in Fig.…”

Section: Conductancementioning

confidence: 99%

Split of zero-bias conductance peak in normal-metal/d-wave superconductor junctions

2004

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“…[12][13][14][15][16][17] The advantage of the random S-matrix model is that it can treat in a unified way the surface scattering from the specular limit to the diffusive limit. Using this model we have studied the rough surface effects on the p-wave 13) and d-wave 14) pairing states. Since the random S-matrix model is based on the boundary condition for the wave function (Nambu amplitude), it can be extended to the dynamical problems with oscillating rough wall.…”

Section: Introductionmentioning

confidence: 99%

Surface Bound States in Superfluid ³He

et al. 2008

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“…In numerical studies of boundary problems similar techniques were used [18,19]. Also a scattering matrix approach, which is related to the randomly rippled wall model [21], was applied to disordered surfaces [22]; the solution was given in a Born-like approximation. Except for models with unitary scatterers [20], all calculations show a broadening of the ZBCP due to disorder.…”

Section: Introductionmentioning

confidence: 99%

d-wave superconductors near surfaces and interfaces: A scattering matrix approach within the quasiclassical technique

2001

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A recently developed method [A. Shelankov and M. Ozana, Phys. Rev. B 61, 7077 (2000)] is applied to investigate d-wave superconductors in the vicinity of (rough) surfaces. While this method allows the incorporation of arbitrary interfaces into the quasiclassical technique, we discuss, as examples, diffusive surfaces and boundaries with small tilted mirrors (facets). The properties of the surface enter via the scattering matrix in the boundary condition for the quasiclassical Green's function. The diffusive surface is described by an ensemble of random scattering matrices. We find that the fluctuations of the density of states around the average are small; the zero bias conductance peak broadens with increasing disorder. The faceted surface is described in the model where the scattering matrix couples m in-and m out-trajectories (m ≥ 2). No zero bias conductance peak is found for [100] surfaces; the relation to the model of Fogelström et al. [Phys. Rev. Lett. 79, 281 (1997)] is discussed.

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Rough Surface Effects ond-Wave Superconductors

Cited by 57 publications

References 19 publications

Split of zero-bias conductance peak in normal-metal/d-wave superconductor junctions

Split of zero-bias conductance peak in normal-metal/d-wave superconductor junctions

Surface Bound States in Superfluid ³He

d-wave superconductors near surfaces and interfaces: A scattering matrix approach within the quasiclassical technique

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Rough Surface Effects ond-Wave Superconductors

Cited by 57 publications

References 19 publications

Split of zero-bias conductance peak in normal-metal/d-wave superconductor junctions

Split of zero-bias conductance peak in normal-metal/d-wave superconductor junctions

Surface Bound States in Superfluid 3He

d-wave superconductors near surfaces and interfaces: A scattering matrix approach within the quasiclassical technique

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Surface Bound States in Superfluid ³He