Origin of zero-bias conductance peaks in high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="italic">T</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>superconductors

Kashiwaya, Satoshi; Tanaka, Yukio; Koyanagi, M.; Takashima, Hiroshi; Kajimura, K.

doi:10.1103/physrevb.51.1350

Cited by 392 publications

(246 citation statements)

References 14 publications

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“…Observation of the zerobias conductance peak (ZBCP) [24] due to the formation of the midgap Andreev bound states [25] confirmed the d-wave symmetry of the high-T c cuprates. Electron tunneling into a three-dimensional p-wave superconductor with the pairing potential corresponding to the B-phase of 3 He was considered in Ref.…”

Section: Introductionmentioning

confidence: 85%

Edge states and determination of pairing symmetry in superconductingSr2RuO4

2002

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We calculate the energy dispersion of the surface Andreev states and their contribution to tunneling conductance for the order parameters with horizontal and vertical lines of nodes proposed for superconducting Sr2RuO4. For vertical lines, we find double peaks in tunneling spectra reflecting the van Hove singularities in the density of surface states originating from the turning points in their energy dispersion. For horizontal lines, we find a single cusp-like peak at zero bias, which agrees very well with the experimental data on tunneling in Sr2RuO4.

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Section: Introductionmentioning

confidence: 85%

Edge states and determination of pairing symmetry in superconductingSr2RuO4

2002

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“…This leads to Andreev bound states along those edges of the d-wave superconductor that reflect particles in the sign reversed way described above. Note, the Andreev bound states reach all the way down to the chemical potential (zero energy), and hence are experimentally detected as a zero bias peak in tunneling measurements 13,14 . The dependence on edge orientation can be erased in samples with disordered surfaces.…”

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confidence: 99%

“…cuprates is the presence of Andreev bound states at the edge which leads to a zero-bias peak in conductivity in superconductor/normal junctions 13,14,15 . The existence of these modes can be intuitively understood as follows.…”

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confidence: 99%

Andreev Bound States as a Phase-Sensitive Probe of the Pairing Symmetry of the Iron Pnictide Superconductors

2009

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arXiv:0812.0015v1 [cond-mat.supr-con] 30 Nov 2008Andreev Bound states as a phase sensitive probe of the pairing symmetry of the iron pnictide superconductors. A leading contender for the pairing symmetry in the Fe-pnictide high temperature superconductors is extended s-wave s±, a nodeless state in which the pairing changes sign between Fermi surfaces. Verifying such a pairing symmetry requires a special phase sensitive probe that is also momentum selective. We show that the sign structure of s± pairing can lead to surface Andreev bound states at the sample edge. In the clean limit they only occur when the edge is along the nearest neighbor Fe-Fe bond, but not for a diagonal edge or a surface orthogonal to the c-axis. In contrast to dwave Andreev bound states, they are not at zero energy and, in general, do not produce a zero bias tunneling peak. Consequences for tunneling measurements are derived, within a simplified two band model and also for a more realistic five band model.

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“…For example, for a junction consists of a normal metal and an unconventional superconductor, the quantum interference effect between the injected and the Andreev reflected particles, which feel mutually the different sign of superconducting pair potential through the scattering event at the interface of the junction, forms the so-called zero-energy Andreev bound states(ZABS) [3,4]. Indeed, the ZABS originated from the d-wave symmetry of superconducting pair potential have been observed as the zero-bias conductance peaks(ZBCPs) in tunneling experiment of high T C cuprate superconductors [5][6][7] according to theoretical prediction of Tanaka and Kashiwaya(TK) formula [4]. The ZBCPs reflecting the ZABS are the essential feature of the electrical conductions in normal metal/insulator/unconventional superconductor junction and provide us the information of the pairing symmetry of superconductor [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic features of zero-bias conductance peaks in a ferromagnet/insulator/superconductor junction

Yoshida¹,

Yamashiro²

2012

J. Phys.: Condens. Matter

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We present a general formula for tunneling conductance in ballistic ferromagnet/ferromagnetic insulator/superconductor junctions where the superconducting state has opposite spin pairing symmetry. The formula can involve correctly a ferromagnetism has been induced by effective mass difference between up-and down-spin electrons. Then, this effective mass mismatch ferromagnet and standard Stoner ferromagnet have been employed in this paper. As an application of the formulation, we have studied the tunneling effect for junctions including spin-triplet p-wave superconductor, where we choose a normal insulator for the insulating region whereas our formula can treat a ferromagnetic insulator. Then, we have been able to devote our attention to features of ferromagnetic metal. The conductace spectra show a clear difference between two ferromagnets depending upon the way of normalization of the conductance. Especially, a essential difference is seen in zero-bias conductance peaks reflecting characteristics of each ferromagnets. From obtained results, it will be suggested that the measurements of the tunneling conductance in the junction provide us a useful information about the mechanism of itinerant ferromagnetism in metals.PACS numbers: 74.20.Rp

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Origin of zero-bias conductance peaks in high-Tcsuperconductors

Cited by 392 publications

References 14 publications

Edge states and determination of pairing symmetry in superconductingSr2RuO4

Edge states and determination of pairing symmetry in superconductingSr2RuO4

Andreev Bound States as a Phase-Sensitive Probe of the Pairing Symmetry of the Iron Pnictide Superconductors

Ferromagnetic features of zero-bias conductance peaks in a ferromagnet/insulator/superconductor junction

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