- Magnetoanisotropic Andreev Reflection in Ferromagnet/Superconductor.
- Spin polarized transport as measured by superconducting Andreev.
- Magnetoanisotropic Andreev reflection in ferromagnet-superconductor.
- CiteSeerX Probing spin polarization with Andreev reflection: A.
- Andreev reflection in ferromagnet/superconductor... - ScienceDirect.
- Andreev reflection and pair-breaking effects at the superconductor.
- Andreev reflection spectroscopy in transition metal oxides.
- Magnetoanisotropic Andreev Reflection in Ferromagnet-Superconductor.
- Spin-polarized multiple Andreev reflections in spin-split superconductors.
- PDF Spin-polarized multiple Andreev reflections in spin-split superconductors.
- Correlated spin currents generated by resonant-crossed Andreev... - Nature.
- Probing Spin Polarization with Andreev Reflection: A Theoretical Basis.
- Science and technology roadmap for graphene, related two.
- Andreev reflection - Wikipedia.
Magnetoanisotropic Andreev Reflection in Ferromagnet/Superconductor.
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): 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 theory of Andreev reflection for spin-polarized systems and arbitrary Fermi.
Spin polarized transport as measured by superconducting Andreev.
The control and manipulation of spins in graphene may lead to a number of novel applications and to the design of new devices, such as spin-based memories 217 or spin logic chips. 218 Graphene is uniquely suitable for such applications, since it does not show sizeable spinorbit coupling, 74 and is almost free of nuclear magnetic moments. 219. UNK the ,. of and in " a to was is ) ( for as on by he with 's that at from his it an were are which this also be has or had first one their its new after but who not they have. Correlated spin currents generated by resonant-crossed Andreev reflections in topological superconductors Authors James J He 1 , Jiansheng Wu 1 , Ting-Pong Choy 2 , Xiong-Jun Liu 2 , Y Tanaka 3 , K T Law 1 Affiliations 1 Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
Magnetoanisotropic Andreev reflection in ferromagnet-superconductor.
Here we report experimental observation of Andreev reflection in junctions of spin-resolved quantum Hall (QH) states in an InAs quantum well and the spin-singlet superconductor NbTi. The measured. This component enables non-local crossed Andreev reflection between the spin-polarized chiral edge states running on opposite sides of the superconducting finger, thus opening a gap in the spectrum of the edge states without the need of spin-orbit interaction or non-trivial magnetic textures. We investigate the applicability of spin-polarization measurements using Andreev reflection in a point- contact geometry in heavily doped dilute magnetic semiconductors, such as Ga,Mn As. Although we observe conventional Andreev reflection in nonmagnetic Ga,Be As epilayers, our measurements indicate that in fer.
CiteSeerX Probing spin polarization with Andreev reflection: A.
We present a theory of Andreev reflection in a ferromagnet/superconductor/ferromagnet double junction system. In the Andreev reflection process, the injected spin polarized quasiparticles convert into Cooper pairs in the superconductor within the range of the penetration depth from the interface. One of the most interesting effects in this environment is spin-polarized Andreev reflection. Andreev reflection at a boundary between a conventional superconductor and a ferromagnet is well. We show that spin-polarized electron transmission across semiconductor/superconductor (Sm/S) hybrid structures depends sensitively on the degree of spin polarization.
Andreev reflection in ferromagnet/superconductor... - ScienceDirect.
Here we review the literature concerning measurement of the Andreev reflection between a superconductor (S) and ferromagnet (F),... A finite conductance at zero bias for a 100% spin polarized material can only be achieved, with the M-BTK model, in the presence of finite broadening of the quasiparticle density of states, such as exists at.
Andreev reflection and pair-breaking effects at the superconductor.
The process of electron reflecting back as a hole from the normal-superconductor interface and transferring a Cooper pair to the superconductor is termed Andreev reflection. Using the Blonder-Tinkham-Klapwijk ( Blonder et al., 1982) formalism, the conductance into the superconductor can be written in terms of elements of this scattering matrix as. The process is highly spin dependent - if only one spin band is occupied by the conduction electrons in the normal state material (ie - it is fully spin polarised), Andreev reflection will be inhibited due to inability to form a pair in the superconductor and impossibility of single particle transmission.
Andreev reflection spectroscopy in transition metal oxides.
If the ferromagnet is highly spin polarizedin the half-metal limitthe magnetoanisotropic Andreev reflection depends universally on the spin-orbit fields only. Our results show that Andreev reflection spectroscopy can be used for sensitive probing of interfacial spin-orbit fields in a FS junction. Received 27 February 2015. Correlated spin currents generated by resonant-crossed Andreev reflections in topological superconductors James J. He , Jiansheng Wu , Ting-Pong Choy , Xiong-Jun Liu , Y. Tanaka & K. T. Law Nature. The basic idea of Andreev spectroscopy is to measure the Andreev reflection of spin polarized conduction electrons on a superconductor surface [30-32]. When current is injected into the superconductor the charge must be converted to spin singlet Cooper pairs composed from two electrons with opposite spins.
Magnetoanisotropic Andreev Reflection in Ferromagnet-Superconductor.
In this paper, we study the effect of spin injection via Andreev reflection on MR in the FM/SC/FM junction. We consider the junction consisting of SC with thickness L sandwiched by semi-infinite ferromagnets FM1 and FM2. The boundary between FM1/SC and that between SC/FM2 are at z = L /2 and L /2, respectively.
Spin-polarized multiple Andreev reflections in spin-split superconductors.
We theoretically investigate spin-polarized transport in FS junctions in the presence of Rashba and Dresselhaus interfacial spin-orbit fields and show that Andreev reflection can be controlled by changing the magnetization orientation. We predict a giant in- and out-of-plane magnetoanisotropy of the junction conductance. Here we study spin polarization of the vortex core states and spin selective Andreev reflection at the vortex center of the SLTD model. In the topological phase, the differential conductance at the vortex center contributed from the Andreev reflection, is spin selective and has a quantized value (d I / d V) A t o p o = 2 e 2 / h at zero bias. NbN allowing for Andreev reflection between spin-polarized edges. These results provide a route to realize novel topological superconducting phases in FQH-superconductor hybrid devices based on graphene and NbN. DOI: 10.1103/PhysRevX.12.021057 Subject Areas: Condensed Matter Physics I. INTRODUCTION Topological superconductors are predicted to.
PDF Spin-polarized multiple Andreev reflections in spin-split superconductors.
At low transparency, the contribution of multiple Andreev reflections leads to a subharmonic gap structure that crucially depends on the amplitude and relative angle of the spin-splitting fields of each superconductor. Andreev reflection ( AR ), named after the Russian physicist Alexander F. Andreev, is a type of particle scattering which occurs at interfaces between a superconductor (S) and a normal state material (N). It is a charge-transfer process by which normal current in N is converted to supercurrent in S. Superconductivity Correction: Journal of Applied Physics 90, 3127 (2001) ABSTRACT Andreev reflection at the interface between a ferromagnet and a superconductor has become a foundation of a versatile technique of measuring the spin polarization of magnetic materials.
Correlated spin currents generated by resonant-crossed Andreev... - Nature.
Spin-split superconductors separated by an insulating barrier of arbitrary transparency. At low transparency, the contribution of multiple Andreev reflections leads to a subharmonic gap structure that crucially depends on the amplitude and relative angle of the spin-splitting fields of each.
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