Proximity junctions on Bi2Sr2CaCu2O8 single crystals

Durusoy, H.Z.; D, Lew; Lombardo, L. W.; Kapitulnik, A.; Beasley, M. R.

doi:10.1016/0921-4534(96)00302-4

Cited by 22 publications

(18 citation statements)

References 21 publications

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“…Experimentally, proximity effect was found to be weaker in the c-axis direction than in the ab-plane direction due to a much shorter co-herence length in the former direction. [89][90][91] We note, however, that so-called giant proximity effect has been reported both in the ab-plane [92][93][94][95] and c-axis 96 directions. Proximity effect in HTSC-ferromagnet and/or HTSC-half-metal heterostructures have also been studied experimentally.…”

Section: Summary and Experimental Implicationsmentioning

confidence: 89%

Topological superconductivity and Majorana fermions in hybrid structures involving cuprate high-Tcsuperconductors

et al. 2013

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The possibility of inducing topological superconductivity with cuprate high-temperature superconductors (HTSC) is studied for various heterostructures. We first consider a ballistic planar junction between a HTSC and a metallic ferromagnet. We assume that inversion symmetry breaking at the tunnel barrier gives rise to Rashba spin-orbit coupling in the barrier and allows equal-spin triplet superconductivity to exist in the ferromagnet. Bogoliubov-de Gennes equations are obtained by explicitly modeling the barrier, and taking account of the transport anisotropy in the HTSC. By making use of the self-consistent boundary conditions and solutions for the barrier and HTSC regions, an effective equation of motion for the ferromagnet is obtained where Andreev scattering at the barrier is incorporated as a boundary condition for the ferromagnetic region. For a ferromagnet layer deposited on a (100) facet of the HTSC, triplet p-wave superconductivity is induced. For the layer deposited on a (110) facet, the induced gap does not have the p-wave orbital character, but has an even orbital symmetry and an odd dependence on energy. For the layer on the (001) facet, an exotic f -wave superconductivity is induced. We also consider the induced triplet gap in a one-dimensional half-metallic nanowire deposited on a (001) facet of a HTSC. Due to the breaking of translational symmetry in the direction perpendicular to the wire axis, the expression for the gap receives contributions from different perpendicular momentum eigenstates in the superconductor. We find that for a wire axis along the a-axis, these different contributions constructively interfere and give rise to a robust triplet p-wave gap. For a wire oriented 45• away from the a-axis the different contributions destructively interfere and the induced triplet p-wave gap vanishes. For the appropriately oriented wire, the induced p-wave gap may give rise to Majorana fermions at the ends of the half-metallic wire. In light of the recent experimental progress in the quest for realizing Majorana fermions, we also discuss inducing superconductivity in the spin-orbit coupled nanowire using a HTSC. Based on our result, topological superconductivity in a semi-conductor nanowire may be possible given that it is oriented along the a-axis of the HTSC.

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Section: Summary and Experimental Implicationsmentioning

confidence: 89%

Topological superconductivity and Majorana fermions in hybrid structures involving cuprate high-Tcsuperconductors

et al. 2013

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“…This facet-selectivity reflects the in plane versus out of plane anisotropy in the cuprate superconductors, which was also measured indirectly by other groups [8,9,10]. However, the proximity-induced order parameter decayed exponentially in a way typical of conventional N-S proximity systems.…”

mentioning

confidence: 87%

Anomalous Proximity Effect in Gold Coated (110)YBa2Cu3O7
Asulin
¹
,
Sharoni
²
,
Yulli
³

et al. 2004
Phys. Rev. Lett.
15
1
10
0
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Scanning tunneling spectroscopy of (110) Y Ba 2 Cu 3 O 7−δ /Au bi-layers reveal a proximity effect markedly different from the conventional one. While proximity-induced mini-gaps rarely appear in the Au layer, the Andreev bound states clearly penetrate into the metal. Zero bias conductance peaks are measured on Au layers thinner than 7 nm with magnitude similar to those detected on the bare superconductor films. The peaks then decay abruptly with Au thickness and disappear above 10 nm. This length is shorter than the normal coherence length and corresponds to the (ballistic) mean free path.

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“…• C and annealed for one hour at It is important to note that a-axis YBCO films were chosen for this study, rather than the more common c-axis (001)YBCO films, since the PE is significantly suppressed along the c-axis [20,21].…”

Section: Methodsmentioning

confidence: 99%

Long-range proximity effect in La2/3Ca1/3MnO
Kalcheim
¹
,
Kirzhner
²
,
Koren
³

et al. 2011
Phys. Rev. B

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Proximity junctions on Bi2Sr2CaCu2O8 single crystals

Cited by 22 publications

References 21 publications

Topological superconductivity and Majorana fermions in hybrid structures involving cuprate high-Tcsuperconductors

Topological superconductivity and Majorana fermions in hybrid structures involving cuprate high-Tcsuperconductors

Anomalous Proximity Effect in Gold Coated (110)YBa2Cu3O7
Asulin
¹
,
Sharoni
²
,
Yulli
³

et al. 2004
Phys. Rev. Lett.
15
1
10
0
View full text Add to dashboard Cite

Long-range proximity effect in La2/3Ca1/3MnO
Kalcheim
¹
,
Kirzhner
²
,
Koren
³

et al. 2011
Phys. Rev. B

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Proximity junctions on Bi2Sr2CaCu2O8 single crystals

Cited by 22 publications

References 21 publications

Topological superconductivity and Majorana fermions in hybrid structures involving cuprate high-Tcsuperconductors

Topological superconductivity and Majorana fermions in hybrid structures involving cuprate high-Tcsuperconductors

Anomalous Proximity Effect in Gold Coated (110)YBa2Cu3O7Asulin1, Sharoni2, Yulli3 et al. 2004Phys. Rev. Lett.151100View full textAdd to dashboardCite

Long-range proximity effect in La2/3Ca1/3MnOKalcheim1, Kirzhner2, Koren3 et al. 2011Phys. Rev. B

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Anomalous Proximity Effect in Gold Coated (110)YBa2Cu3O7
Asulin
¹
,
Sharoni
²
,
Yulli
³

et al. 2004
Phys. Rev. Lett.
15
1
10
0
View full text Add to dashboard Cite

Long-range proximity effect in La2/3Ca1/3MnO
Kalcheim
¹
,
Kirzhner
²
,
Koren
³

et al. 2011
Phys. Rev. B