Andreev Reflection In Spin Polarised Superconductor

Spin-polarized currents in superconducting films - A.
PDF S electiv e Equal-Spin Andreev Reflections Induced by Major ana Fermions.
Probing spin polarization with Andreev reflection: A theoreti..|INIS.
The Stanford Natural Language Processing Group.
Spiral: Andreev bound states in superconductor/ferromagnet point.
Charge imbalance, crossed Andreev reflection and elastic... - IOPscience.
Magnetoanisotropic Andreev Reflection in Ferromagnet-Superconductor.
Altmetric - Correlated spin currents generated by resonant-crossed.
Andreev bound states at spin-active interfaces - PMC.
Correlated spin currents generated by resonant-crossed Andreev.
Point-Contact Andreev Reflection in Ferromagnet/Superconductor.
APS -APS March Meeting 2022 - Event - Crossed Andreev reflection in the.
Stanford University.
Andreev Reflection in Ferromagnet/Superconductor/Ferromagnet Double.

Spin-polarized currents in superconducting films - A.

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. If the ferromagnet is highly spin polarized—in the half-metal limit—the 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.

PDF S electiv e Equal-Spin Andreev Reflections Induced by Major ana Fermions.

The hole spin accumulation and spin-polarized transport in ferromagnetic semiconductor (FS) / d-wave superconductor (SC)/FS tunnel junctions with {110} interfaces are studied by using four-component Bogoliubov-de Gennes equations, in which the Andreev reflection and four-subband model for the FS are taken into account. It is found that due to the interplay of the d-wave SC and FS, the. Andreev reflection is widely considered the most reliable method for measuring the spin-polarization of half metals. This process occurs when a current passes between a superconductor and a normal metal at a point contact.

Probing spin polarization with Andreev reflection: A theoreti..|INIS.

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. We study theoretically the differential conductance at a junction between a periodically driven spin orbit coupled system with a tunable band gap and a superconductor. The dynamics of a spin orbit coupled system, when driven with frequency much larger than the band-width, can be described by an effective static Hamiltonian that is known to have a rich topological phase diagram. We look for. De Jong M J M, Beenakker C W. Andreev reflection in ferromagnet-superconductor junctions. Phys Rev Lett, 1995, 74(9): 1657-1660. Article ADS Google Scholar Zhu J X, Friendman B, Ting C S. Spin-polarized quasiparticle transport in ferromagnet-d-wave-superconductor junctions with a {110} interface. Phys Rev B, 1999, 59(14): 9558-9563.

The Stanford Natural Language Processing Group.

PDF Spin-polarized multiple Andreev reflections in spin-split superconductors. Magnon-assisted Andreev reflection in a ferromagnet-superconductor. APS -APS March Meeting 2022 - Event - Crossed Andreev reflection in the. A: For odd filling factor, spin-orbit coupling is critical for Andreev reflection processes for odd filling factor.

Spiral: Andreev bound states in superconductor/ferromagnet point.

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.

Charge imbalance, crossed Andreev reflection and elastic... - IOPscience.

One of the challenges facing condensed matter physics nowadays is to understand the electronic structure of high temperature superconductors. This dissertation compiles our contribution to the experimental information concerning this subject. Tunneling conductance spectroscopy a technique capable of probing the electronic density of states in hybrid structures was used to study the current and.

Magnetoanisotropic Andreev Reflection in Ferromagnet-Superconductor.

Recently, theory has predicted a Majorana zero mode (MZM) to induce spin selective Andreev reflection (SSAR), a novel magnetic property which can be used to detect the MZM. Here, spin-polarized scanning tunneling microscopy or spectroscopy has been applied to probe SSAR of MZMs in a topological superconductor of the Bi[subscript 2]Tep[subscript.

Altmetric - Correlated spin currents generated by resonant-crossed.

By examining spectra taken from L a 1.15 S r 1.85 M n 2 O 7 − Pb junctions, together with a compilation of literature data on highly spin polarized systems, we suggest that the existence of the Andreev bound state would resolve a number of long standing controversies in the literature of Andreev reflection, as well as defining a route to.

Andreev bound states at spin-active interfaces - PMC.

A superconducting point contact is used to determine the spin polarization at the Fermi energy of several metals. Because the process of supercurrent conversion at a superconductor-metal interface (Andreev reflection) is limited by the minority spin population near the Fermi surface, the differential conductance of the point contact can reveal.

Correlated spin currents generated by resonant-crossed Andreev.

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.

Point-Contact Andreev Reflection in Ferromagnet/Superconductor.

We show that spin-polarized electron transmission across semiconductor/superconductor (Sm/S) hybrid structures depends sensitively on the degree of spin polarization as well as the strengths of potential and spin-flip scattering at the interface.

APS -APS March Meeting 2022 - Event - Crossed Andreev reflection in the.

It is found that the crossed Andreev reflection (CAR) and local Andreev reflection (LAR) depend strongly on the spin-polarized F, the magnetization direction, and the Ising superconducting phase. For the same magnetization directions of the two F leads, the equal-spin CAR could take place due to the spin-flip mechanism induced by the Ising spin. We theoretically study scattering process and superconducting triplet correlations in a graphene junction comprised of ferromagnet-RSO-superconductor in which RSO stands for a region with Rashba spin orbit interaction. Our results reveal spin-polarized subgap transport through the system due to an anomalous equal-spin Andreev reflection in addition to conventional back scatterings. We. 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.

Stanford University.

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 spin–orbit coupling, 74 and is almost free of nuclear magnetic moments. 219.

Andreev Reflection in Ferromagnet/Superconductor/Ferromagnet Double.

The spin polarized quasiparticles penetrate to... Skip to main content Due to a planned power outage on Friday, 1/14, between 8am-1pm PST, some services may be impacted. Zero bias anomalies have been observed in point contact Andreev reflection spectroscopy using conventional superconductors, and they cannot be suppressed by a highly spin-polarized current. By systematically varying the size of the point contact, the anomalies are found to be evolved from conductance dips outside the superconducting gap. Spin-polarized multiple Andreev reflections in spin-split superconductors Abstract We study the transport properties of a voltage-biased contact between two spin-split superconductors separated by an insulating barrier of arbitrary transparency.