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Andreev reflection at the interface between a half-metallic ferromagnet and a spin-singlet superconductor is possible only if it is accompanied by a spin flip. Here we calculate the Andreev reflection amplitudes for the case that the spin…

介观与纳米尺度物理 · 物理学 2015-05-20 Joern N. Kupferschmidt , Piet W. Brouwer

As charge carriers traverse a single superconductor ferromagnet interface they experience an additional spin-dependent phase angle which results in spin mixing and the formation of a bound state called the Andreev Bound State. This state is…

超导电性 · 物理学 2017-03-29 K. A. Yates , D. Prabhakaran , M. Egilmez , J. W. A. Robinson , L. F. Cohen

An incoming electron is reflected back as a hole at a normal-metal-superconductor interface, a process known as Andreev reflection. We predict that there exists a universal transverse shift in this process due to the effect of spin-orbit…

介观与纳米尺度物理 · 物理学 2017-09-13 Ying Liu , Zhi-Ming Yu , Shengyuan A. Yang

We study subgap transport in a ferromagnet-superconductor junction at low temperature due to Andreev reflection. The mismatch of spin polarized current in the ferromagnet and spinless current in the superconductor results in an additional…

介观与纳米尺度物理 · 物理学 2009-10-31 Edward McCann , Vladimir I. Fal'ko

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

We consider a process of the Andreev reflection between a normal metal and the s-wave superconductor in the FFLO state. It is shown that the process takes place if the energy of the incoming electron is bound within the finite interval…

超导电性 · 物理学 2015-05-13 Tomasz L. Partyka , Mariusz Sadzikowski , Motoi Tachibana

The Andreev reflection of narrow ferromagnet/superconductor point contacts is theoretically studied. We show that the conductance quantization depends on whether the contact region is superconducting or ferromagnetic as well as on the…

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

The Andreev Reflection is the key mechanism for the superconducting proximity effect. It provides phase correlations in a system of non-interacting electrons at mesoscopic scales, i.e. over distances much larger than the microscopic lengths…

介观与纳米尺度物理 · 物理学 2007-05-23 B. Pannetier , H. Courtois

Altermagnets are a new class of magnetic materials, which exhibit large spin splitting, but due to the combined spin and real space group symmetry protection maintain zero net macroscopic magnetization. Such a characteristic may prove them…

超导电性 · 物理学 2023-10-18 Michał Papaj

The recent development of superconducting spintronics has revealed the spin-triplet superconducting proximity effect from a spin-singlet superconductor into a spin-polarized normal metal. In addition recently superconducting junctions using…

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

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

Electron correlation in a quantum many-body state appears as peculiar scattering behaviour at its boundary, symbolic of which is Andreev reflection at a metal-superconductor interface. Despite being fundamental in nature, dictated by the…

介观与纳米尺度物理 · 物理学 2021-05-20 Masayuki Hashisaka , Thibaut Jonckheere , Takafumi Akiho , Satoshi Sasaki , Jerome Rech , Thierry Martin , Koji Muraki

We have studied the interplay of Andreev reflection and cyclotron motion of quasiparticles at a superconductor-normal-metal interface with a strong magnetic field applied parallel to the interface. Bound states are formed due to the…

介观与纳米尺度物理 · 物理学 2009-10-31 H. Hoppe , U. Zuelicke , Gerd Schoen

We calculate the conductance of a junction between a disordered superconductor and a very strong half-metallic ferromagnet admitting electrons with only one spin projection. A usual mechanism of Andreev reflection is strongly suppressed in…

超导电性 · 物理学 2024-01-29 M. E. Ismagambetov , P. M. Ostrovsky , M. V. Feigel'man

Here we review the literature concerning measurement of the Andreev reflection between a superconductor (S) and ferromagnet (F), with particular attention to the case where the ferromagnet is a transition metal oxide. We discuss the…

材料科学 · 物理学 2015-03-03 Karen A Yates , Lesley F Cohen

Recent works have predicted materials featuring bands with a large spin-splitting distinct from ferromagnetic and relativistically spin-orbit coupled systems. Materials displaying this property are known as altermagnets and feature a…

超导电性 · 物理学 2023-08-15 Chi Sun , Arne Brataas , Jacob Linder

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

Andreev reflection is a smart tool to investigate the spin polarisation P of the current through point contacts between a superconductor and a ferromagnet. We compare different models to extract P from experimental data and investigate the…

介观与纳米尺度物理 · 物理学 2015-06-12 S. Bouvron , M. Stokmaier , M. Marz , G. Goll

We investigate electron transport through the interface between a niobium superconductor and the edge of a two-dimensional semimetal, realized in a 20~nm wide HgTe quantum well. Experimentally, we observe that typical behavior of a single…

介观与纳米尺度物理 · 物理学 2016-02-03 A. Kononov , S. V. Egorov , Z. D. Kvon , N. N. Mikhailov , S. A. Dvoretsky , E. V. Deviatov
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