- VZLWFKIURPVSLQ VLQJOHWWR Equal-spin Andreev reflection in.
- [2203.05894] Crossed Andreev reflection in spin-polarized.
- Probing spin polarization with Andreev reflection: A theoretical basis.
- Spin Polarizations in a Sentence.
- [PDF] Spin-polarized transport and Andreev reflection in.
- Andreev bound states at spin-active interfaces - PMC.
- Andreev reflection in ferromagnet/superconductor/ferromagnet... - NASA/ADS.
- Spin-Polarized Transport and Andreev Reflection in... - NASA/ADS.
- Andreev Reflection in the Fractional Quantum Hall State.
- (PDF) Spin-dependent Andreev reflection in spin-orbit coupled.
- Correlated spin currents generated by resonant-crossed Andreev.
- Andreev reflection measurements of spin polarization.
- Andreev reflection in ferromagnet/superconductor... - ScienceDirect.
VZLWFKIURPVSLQ VLQJOHWWR Equal-spin Andreev reflection in.
These D class topological superconductors also exhibit a number of interesting transport properties such as fractional Josephson effects 20,21, resonant Andreev reflections 22,23 and enhanced. This could be realized using the two-particle process of spin-polarized Andreev reflection (I. Ž)utić and O.T. Valls, Phys. Rev. B 60, 6320 (1999); I. Žutić and O.T. Valls, Phys. Rev. B 61, 1555 (2000). which governs transport properties at low applied bias. Additionally, we consider spin-polarized transport in inhomogenously doped semiconductors.
[2203.05894] Crossed Andreev reflection in spin-polarized.
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. Odd-frequency pairing in topological superconductivity in a one-dimensional magnetic chain (2015) Hiromi Ebisu et al. PHYSICAL REVIEW B Controlled suppression of superconductivity by the generation of polarized Cooper pairs in spin-valve structures. Andreev reflection spectroscopy of ferromagnet-superconductor (FS) junctions is an important probe of spin polarization. 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.
Probing spin polarization with Andreev reflection: A theoretical basis.
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 conductance indicates a sub-gap feature and two peaks on the outer side of the sub-gap feature in the QH plateau-transition regime increases.
Spin Polarizations in a Sentence.
May 06, 2010 · 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. The book concisely describes how Andreev reflection impacts the low-energy physics of electronic transport especially in topologically non-trivial superconductor junctions. In addition, it includes an introduction to topological superconductors, covering topological classification, chiral and helical superconductors, and topological edges. Aug 17, 2021 · 7.1 Andreev Reflection. Andreev reflection is the fundamental process underpinning mesoscopic superconductivity. It is at the heart of the proximity effect, kinetic inductance of disordered superconductors, and, as will be shown at the end of this chapter, the Josephson effect.
[PDF] Spin-polarized transport and Andreev reflection in.
Different Spin Polarizations Electron Spin Polarizations High Spin Polarizations Nuclear Spin Polarizations Explore More. We study the transport properties of a voltage biased contact between two 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 superconductor. For non.
Andreev bound states at spin-active interfaces - PMC.
Dec 08, 2017 · testify the helical spin texture of the edge states. By proper tuning of the band structures of the ferromagnetic layers, under the resonance bias voltage, the usual and novel local ARs of 100% can be all exhibited, resulting in fully spin-polarized pure spin-singlet superconductivity and.
Andreev reflection in ferromagnet/superconductor/ferromagnet... - NASA/ADS.
In the phase with two Majorana fermions, the superconductor can split Cooper pairs efficiently into electrons in two spatially separated leads due to Majorana-induced resonant-crossed Andreev reflections. The resulting currents in the leads are correlated and spin-polarized.
Spin-Polarized Transport and Andreev Reflection in... - NASA/ADS.
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. 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. In this article we will briefly outline a general theory of Andreev reflection for spin-polarized systems and arbitrary Fermi surface in two limiting cases of ballistic and diffusive transport. ' '' ''' - -- --- ---- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- -----.
Andreev Reflection in the Fractional Quantum Hall State.
Jul 17, 2019 · Abstract: We study the transport properties of a voltage biased contact between two 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. The process is highly spin-dependent - if only one spin band is occupied by the conduction electrons in the normal-state material (i.e. it is fully spin-polarized), Andreev reflection will be inhibited due to inability to form a pair in the superconductor and impossibility of single-particle transmission. 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.
(PDF) Spin-dependent Andreev reflection in spin-orbit coupled.
Aug 06, 2018 · A spin-up electron undergoes Andreev reflection over the length scale of the coherence length ξ inside the superconductor (1), and is reflected as a hole in the spin-down band. The hole is reflected back into the superconductor from the spin-active interface (2), where it picks up a phase shift θ s /2.
Correlated spin currents generated by resonant-crossed Andreev.
Therefore, when the thickness of the superconductor is comparable to or smaller than the penetration depth, the current strongly depends on the relative orientation of magnetization of the ferromagnets. We show the effect of spin injection via Andreev reflection on the current flowing through the present system. PhD in Condensed Matter Theory Brown University, 2008 Professor Department of Physics Associate Director of Center for Quantum Materials (852) 2358 7970 Room 4471 Personal Web Google Scholar 5Z73YxcAAAAJ ORCID 0000-0003-0501-6290 Scopus ID 35229499900 Research Interest Publications Teaching Assignment RPG Supervision Research Interest. Resonant Andreev reflection in a FIDI'D' system where F is spin-polarized and DI'D' is a D-wave superconductor containing a grain boundary. Master's thesis, Texas A&M University. Available electronically from / / /1969.1 /ETD-TAMU-2000-THESIS-W265.
Andreev reflection measurements of spin polarization.
The Andreev bound states and charge transport in a Josephson junction between two superconductors with intrinsic exchange fields are studied. We find that for a parallel configuration of the exchange fields in the superconductors the discrete spectrum consists of two pairs of spin-split states.... Our predictions can be tested by performing a. Topological superconductors have attracted tremendous interest for harboring Majorana bound states (MBSs) on their boundaries 1,2,3,4,5,6,7,8,9,10,11,12,13.The non-Abelian Majorana zero modes in.
Andreev reflection in ferromagnet/superconductor... - ScienceDirect.
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.
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