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This paper reviews the confinement-driven phase transitions, and the prediction of superfluid phases with broken time-reversal or translational symmetry in thin films. The new phases are a result of particle-hole coherent Andreev scattering…

超导电性 · 物理学 2018-07-27 Anton B. Vorontsov

The accurate and proper form of electron-hole excitations and corresponding Dirac-like spinors of monolayer molybdenum disulfide superconductor are exactly obtained. Andreev reflection and resulting subgap conductance in a $MoS_2$-based…

介观与纳米尺度物理 · 物理学 2017-02-01 H. Goudarzi , M. Khezerlou , S. F. Ebadzadeh

The Andreev reflection of the normal state-superconductor junction both in monolayer and bilayer graphene with a single magnetic barrier is investigated by means of the Green's function formalism. Within the tight-binding model, we study…

介观与纳米尺度物理 · 物理学 2013-05-07 Hengyi Xu , T. Henizel

Using the highly inhomogeneous fields of a magnetic substrate, tunable junctions between superconducting and normal state regions were created inside a thin film superconductor. The investigation of these junctions, created in the same…

超导电性 · 物理学 2009-09-29 J. Fritzsche , R. B. G. Kramer , V. V. Moshchalkov

We study a simple microscopic model for thin, ferromagnetic, metallic layers on semi-infinite bulk superconductor. We find that for certain values of the exchange spliting, on the ferromagnetic side, the ground states of such structures…

介观与纳米尺度物理 · 物理学 2009-11-07 M. Krawiec , B. L. Gyorffy , J. F. Annett

We present a theory of Andreev reflection in a ferromagnet/superconductor/ferromagnet double junction system. The spin polarized quasiparticles penetrate to the superconductor in the range of penetration depth from the interface by the…

介观与纳米尺度物理 · 物理学 2009-11-07 Taro Yamashita , Hiroshi Imamura , Saburo Takahashi , Sadamichi Maekawa

At low temperatures, the transport through a superconductor-ferromagnet tunnel interface is due to tunneling of electrons in pairs. Exchange field of a monodomain ferromagnet aligns electron spins and suppresses the two electron tunneling.…

超导电性 · 物理学 2007-05-23 Nikolai M. Chtchelkatchev , Igor S. Burmistrov

Sub-gap conductance at a large area junction with a rough interface of a ferromagnet and a high-T$_{C}$ superconductor is superimposed by multiple peaks which is not expected from an ideal point contact Andreev reflection process. We…

超导电性 · 物理学 2009-03-25 N. Ghosh , H. Schmidt , M. Grundmann

Andreev reflection in ferromagnet-superconductor junctions is derived in a regime in which Zeeman splitting dominates the response of the superconductor to an applied magnetic field. Spin-up and spin-down Andreev reflections are shown to be…

超导电性 · 物理学 2009-10-31 R. Mélin

This paper theoretically discusses the spin current in spin-triplet superconductor / insulator / spin-triplet superconductor junctions. At low temperatures, a midgap Andreev resonant state anomalously enhances not only the charge current…

超导电性 · 物理学 2009-11-11 Yasuhiro Asano

We investigate the Andreev transport through double-quantum-dot Cooper pair splitters with ferromagnetic leads. The analysis is performed with the aid of the real-time diagrammatic technique in the sequential tunneling regime. We study the…

介观与纳米尺度物理 · 物理学 2015-08-25 Piotr Trocha , Ireneusz Weymann

We use a superconducting microresonator as a cavity to sense absorption of microwaves by a superconducting quantum point contact defined by surface gates over a proximitized two-dimensional electron gas. Renormalization of the cavity…

We study the transport properties of a hybrid nanostructure composed of a ferromagnet, two quantum dots, and a superconductor connected in series. By using the non-equilibrium Green's function approach, we have calculated the electric…

介观与纳米尺度物理 · 物理学 2015-05-14 E. C. Siqueira , G. G. Cabrera

We investigate superconducting quantum interference devices consisting of two highly transmissive Josephson junctions coupled by a superconducting loop, all defined in an epitaxial InAs/Al heterostructure. A novel device design allows for…

When a quantum dot is attached to a metallic reservoir and a superconducting contact Andreev processes leads to a finite subgap current at the normal lead and the creation or destruction of Cooper pairs. Andreev-reflection engines profit…

介观与纳米尺度物理 · 物理学 2023-11-07 Gonzalo Manzano , Rosa López

We theoretically demonstrate unusual features of superconducting proximity effect in gapped graphene which presents a pseudospin symmetry-broken ferromagnet with a net pseudomagnetization. We find that the presence of a band gap makes the…

介观与纳米尺度物理 · 物理学 2015-06-11 Leyla Majidi , Malek Zareyan

We report properties of parametric electron pumping in the presence of a superconducting lead. Due to a constructive interference between the direct reflection and the multiple Andreev reflection, the pumped current is greatly enhanced. For…

凝聚态物理 · 物理学 2009-11-07 Jian Wang , Yadong Wei , Baigeng Wang , Hong Guo

Andreev reflection at the interface between a ferromagnet and a superconductor has become a foundation of a versatile new technique of measuring the spin polarization of magnetic materials. In this paper we will briefly outline a general…

材料科学 · 物理学 2009-10-31 I. I. Mazin , A. A. Golubov , B. Nadgorny

In this work, we theoretically study transverse magnetic focusing in a two-dimensional electron gas with strong Rashba spin-orbit interaction when proximitized along its edge with a superconducting contact. The presence of superconducting…

介观与纳米尺度物理 · 物理学 2021-10-05 Lucila Peralta Gavensky , Gonzalo Usaj , C. A. Balseiro

Motivated by the recent experiment of Wang et al. [Nature Physics 6, 389 (2010)], who observed a highly unusual transport behavior of ferromagnetic Cobalt nanowires proximity-coupled to superconducting electrodes, we study proximity effect…

超导电性 · 物理学 2015-06-03 So Takei , Victor Galitski