"Giant" Aharonov-Bohm effect in mesoscopic silver rings with bismuth electrodes

Petrashov, V. T.; Antonov, V. N.; Shaikhaidarov, R.; Максимов, С. В.; Meeson, P. J.; Souhami, R.; Springford, M

doi:10.1209/epl/i1996-00500-3

Cited by 10 publications

(12 citation statements)

References 12 publications

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“…Note that related normal-normal conductances have already been shown to exhibit changes in the sign of the magnetoconductance as a function of geometric parameters of the system, in Ref. [2].…”

Section: A Simple Applicationmentioning

confidence: 83%

“…Dissipative single-electron transport in mesoscopic structures involving normal and superconducting elements has in recent years become a topic of lively experimental [1][2][3][4][5][6] and theoretical [7][8][9][10][11][12] activity. From both of these points of view, this is a natural extension of the interest in usual (i.e., normal) mesoscopic systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Diagrammatic theory of random scattering matrices for normal-metal–superconducting mesoscopic junctions

Argaman¹,

Zee²

1996

Phys. Rev. B

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The planar-diagrammatic technique of large-N random matrices is extended to evaluate averages over the circular ensemble of unitary matrices.It is then applied to study transport through a disordered metallic "grain", attached through ideal leads to a normal electrode and to a superconducting electrode. The latter enforces boundary conditions which coherently couple electrons and holes at the Fermi energy through Andreev scattering. Consequently, the leading order of the conductance is altered, and thus changes much larger than e 2 /h are observed when, e.g., a weak magnetic field is applied. This is in agreement with existing theories. The approach developed here is intermediate between the theory of dirty superconductors (the Usadel equations) and the random-matrix approach involving transmission eigenvalues (e.g. the DMPK equation) in the following sense: even though one starts from a scattering formalism, a quantity analogous to the superconducting order-parameter within the system naturally arises. The method can be applied to a variety of mesoscopic normal-superconducting structures, but for brevity we consider here only the case of a simple disordered N-S junction.

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Section: A Simple Applicationmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Diagrammatic theory of random scattering matrices for normal-metal–superconducting mesoscopic junctions

Argaman¹,

Zee²

1996

Phys. Rev. B

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“…This has been probed in recent transport experiments, either with highly transparent point contacts [15] or with intermediate interface transparencies [16]. Other systems such as F/S interfaces in diffusive heterostructures have been the subject of several experimental investigations [17][18][19][20][21][22]. These works have generated many theoretical discussions (see for instance Refs.…”

Section: Introductionmentioning

confidence: 99%

Microscopic theory of non local pair correlations in metallic F/S/F trilayers

Apinyan¹,

Mélin²

2002

Eur. Phys. J. B

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We consider a microscopic theory of F/S/F trilayers with metallic or insulating ferromagnets. The trilayer with metallic ferromagnets is controlled by the formation of non local pair correlations among the two ferromagnets which do not exist with insulating ferromagnets. The difference between the insulating and ferromagnetic models can be understood from lowest order diagrams. Metallic ferromagnets are controlled by non local pair correlations and the superconducting gap is larger if the ferromagnetic electrodes have a parallel spin orientation. Insulating ferromagnets are controlled by pair breaking and the superconducting gap is smaller if the ferromagnetic electrodes have a parallel spin orientation. The same behavior is found in the presence of disorder in the microscopic phase variables and also in the presence of a partial spin polarization of the ferromagnets. The different behaviors of the metallic and insulating trilayers may be probed in experiments.

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“…One theoretically well‐established example can be found in superconductor–ferromagnet junctions which allow the conversion of conventional s ‐wave spin‐singlet Cooper pairs to odd‐frequency spin‐triplet pairs, due to the breaking of spin‐rotational symmetry . Experimental signatures of odd‐frequency correlations have been observed in real systems . Another notable example is the interface between a conventional superconductor and a normal metal, in which odd‐frequency pairing can emerge due to broken spatial translation symmetry .…”

Section: Superconductor‐based Van Der Waals Systemsmentioning

confidence: 99%

“…[143,[156][157][158][159][160][161][162][163] Experimental signatures of odd-frequency correlations have been observed in real systems. [164][165][166][167][168][169][170] Another notable example is the interface between a conventional superconductor and a normal metal, in which odd-frequency pairing can emerge due to broken spatial translation symmetry. [171,172] In this case, the magnitudes of the odd-frequency correlations dominate over the even-frequency amplitudes at discrete energy levels coinciding exactly with peaks in the local density of states, [172] indicating a relationship between these odd-frequency pair amplitudes and McMillan-Rowell oscillations [173,174] as well as midgap Andreev resonances.…”

Section: Odd-frequency Pairingmentioning

confidence: 99%

Van Der Waals Heterostructures with Spin‐Orbit Coupling

Rossi

Triola

2019

Annalen der Physik

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Herein, recent work on van der Waals (vdW) systems in which at least one of the components has strong spin‐orbit coupling is reviewed, focussing on a selection of vdW heterostructures to exemplify the type of interesting electronic properties that can arise in these systems. First a general effective model to describe the low energy electronic degrees of freedom in these systems is presented. The model is then applied to study the case of (vdW) systems formed by a graphene sheet and a topological insulator. The electronic transport properties of such systems are discussed and it is shown how they exhibit much stronger spin‐dependent transport effects than isolated topological insulators. Then, vdW systems are considered in which the layer with strong spin‐orbit coupling is a monolayer transition metal dichalcogenide (TMD) and graphene‐TMD systems are briefly discussed. In the second part of the article, a case is discussed in which the vdW system includes a superconducting layer in addition to the layer with strong spin‐orbit coupling. It is shown in detail how these systems can be designed to realize odd‐frequency superconducting pair correlations. Finally, twisted graphene‐NbSe2 bilayer systems are discussed as an example in which the strength of the proximity‐induced superconducting pairing in the normal layer, and its Ising character, can be tuned via the relative twist angle between the two layers forming the heterostructure.

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"Giant" Aharonov-Bohm effect in mesoscopic silver rings with bismuth electrodes

Cited by 10 publications

References 12 publications

Diagrammatic theory of random scattering matrices for normal-metal–superconducting mesoscopic junctions

Diagrammatic theory of random scattering matrices for normal-metal–superconducting mesoscopic junctions

Microscopic theory of non local pair correlations in metallic F/S/F trilayers

Van Der Waals Heterostructures with Spin‐Orbit Coupling

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