170 citations · 1.9k across the 69 of their papers we have counts for
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Quasiparticle conductance in Spin Valve Josephson Structures
Evan Moen, Oriol T. Valls
We study the quasiparticle current in clean ferromagnetic Josephson structures of the form , where , , and denote superconducting, ferromagnetic or nor…
Bias current dependence of superconducting transition temperature in superconducting spin valve nanowires
Alejandro A. Jara, Evan Moen, Oriol T. Valls +1
Competition between superconducting and ferromagnetic ordering at interfaces between ferromagnets (F) and superconductors (S) gives rise to several proximity effects such as odd-tr…
Spin-split conductance and subgap peak in ferromagnet/superconductor spin valve heterostructures
Evan Moen, Oriol T. Valls
We consider the separate spin channel contributions to the charge conductance in superconducting/ferromagnetic spin valve structures. We find that the up- and down-sp…
Spin current and spin transfer torque in ferromagnet/superconductor spin valves
Evan Moen, Oriol T. Valls
Using fully self consistent methods, we study spin transport in realistic, fabricable experimental spin valve systems consisting of two magnetic layers, a superconducting layer, an…
Transport in Ferromagnet/Superconductor spin valves
Evan Moen, Oriol T. Valls
We consider charge transport properties in realistic, fabricable, Ferromagnet/Superconductor spin valves having a layered structure , where and denote the…
Charge and Spin Currents in Ferromagnetic Josephson junctions
Klaus Halterman, Oriol T. Valls, Chien-Te Wu
We determine, using a self consistent method, the charge and spin currents in ballistic Josephson junctions consisting of ferromagnetic () layers sandwiched between superconduct…
Tunneling Conductance and Spin Transport in Clean Ferromagnet-Ferromagnet-Superconductor Heterostructures
Chien-Te Wu, Oriol T. Valls, Klaus Halterman
We present a transfer matrix approach that combines the Blonder-Tinkham-Klapwijk (BTK) formalism and self-consistent solutions to the Bogolibuov-de Gennes (BdG) equations and use i…
Angular dependence of superconductivity in superconductor / spin valve heterostructures
Alejandro A. Jara, Christopher Safranski, Ilya N. Krivorotov +4
We report measurements of the superconducting transition temperature, , in CoO/Co/Cu/Co/Nb multilayers as a function of the angle between the magnetic moments of the Co la…
Spin-controlled superconductivity and tunable triplet correlations in graphene nanostructures
Klaus Halterman, Oriol T. Valls, Mohammad Alidoust
We study graphene ferromagnet/superconductor/ferromagnet (F/S/F) nanostructures via a microscopic self-consistent Dirac Bogoliubov-de Gennes formalism. We show that as a result of…
Comment on "Unified Formalism of Andreev Reflection at a Ferromagnet/Superconductor Interface" by T.Y. Chen, et al
M. Eschrig, A. A. Golubov, I. I. Mazin +4
A recent paper of Chen et al. claims to have derived an allegedly previously unavailable "unified" Andreev Reflection (AR) formalism for an arbitrary spin polarization P that recov…
Supra-oscillatory critical temperature dependence of Nb-Ho bilayers
F. Chiodi, J. D. S. Witt, R. G. J. Smits +7
We investigate the critical temperature Tc of a thin s-wave superconductor (Nb) proximity coupled to a helical rare earth ferromagnet (Ho). As a function of the Ho layer thickness,…
Proximity Effects in Conical-Ferromagnet/Superconductor bilayers
Chien-Te Wu, Oriol T. Valls, Klaus Halterman
We study various aspects of proximity effects in (Ferromagnet/Superconductor) bilayers, where has a spiral magnetic texture such as that found in Holmium, Erbium and othe…
Proximity effects and triplet correlations in Ferromagnet/Ferromagnet/Superconductor nanostructures
Chien-Te Wu, Oriol T. Valls, Klaus Halterman
We report the results of a study of superconducting proximity effects in clean Ferromagnet/Ferromagnet/Superconductor () heterostructures, where the pairing state in…
Reentrant superconductivity in conical-ferromagnet/superconductor nanostructures
Chien-Te Wu, Oriol T. Valls, Klaus Halterman
We study a bilayer consisting of an ordinary superconductor and a magnet with a spiral magnetic structure of the {\rm Ho} type. We use a self consistent solution of the Bogolioubov…
Characteristic energies, transition temperatures, and switching effects in clean SNS graphene nanostructures
Klaus Halterman, Oriol T. Valls, Mohammad Alidoust
We study proximity effects in clean nanoscale superconductor-normal metal-superconductor (SNS) graphene heterostructures using a self-consistent numerical solution to t…
Angular Dependence of the Superconducting Transition Temperature in Ferromagnet-Superconductor-Ferromagnet Trilayers
Jian Zhu, Ilya N. Krivorotov, Klaus Halterman +1
The superconducting transition temperature, , of a ferromagnet (F) - superconductor (S) - ferromagnet trilayer depends on the mutual orientation of the magnetic moments of the…
Superconducting proximity effects in metals with a repulsive pairing interaction
Oriol T. Valls, Matthew Bryan, Igor Zutic
Studies of the superconducting proximity effect in normal conductor/superconductor junctions almost universally assume no effective electron-electron coupling in the re…
The phase diagram of vortex matter in layered superconductors with tilted columnar pinning centers
Chandan Dasgupta, Oriol T. Valls
We study the vortex matter phase diagram of a layered superconductor in the presence of columnar pinning defects, {\it tilted} with respect to the normal to the layers. We use nume…
Emergence of Triplet Correlations in Superconductor/Half Metallic Nanojunctions with Spin Active Interfaces
Klaus Halterman, Oriol T. Valls
We study triplet pairing correlations induced in an SFS trilayer (where F is a ferromagnet and S an ordinary s-wave superconductor) by spin flip scattering at the interfaces. We de…
Tunneling conductance in Superconductor/Ferromagnet junctions: a self consistent approach
Paul H. Barsic, Oriol T. Valls
We evaluate the tunneling conductance of clean Ferromomagnet/Superconductor junctions via a fully self-consistent numerical solution of the microscopic Bogoliubov-DeGennes equation…
Induced Triplet Pairing in clean s-wave Superconductor/Ferromagnet layered structures
Klaus Halterman, Oriol T. Valls, Paul H. Barsic
We study induced triplet pairing correlations in clean ferromagnet/superconductor/ferromagnet heterostructures. The pairing state in the superconductor is the conventional singlet…
Phase diagram of randomly pinned vortex matter in layered superconductors: dependence on the details of the point pinning
Chandan Dasgupta, Oriol T. Valls
We study the thermodynamic and structural properties of the superconducting vortex system in high temperature layered superconductors, with magnetic field normal to the layers, in…
Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures
Klaus Halterman, Paul H. Barsic, Oriol T. Valls
We study triplet pairing correlations in clean Ferromagnet (F)/Superconductor (S) nanojunctions, via fully self consistent solution of the Bogoliubov-de Gennes equations. We consid…
Phase diagram of vortex matter in layered superconductors with random point pinning
Chandan Dasgupta, Oriol T. Valls
We study the phase diagram of the superconducting vortex system in layered high-temperature superconductors in the presence of a magnetic field perpendicular to the layers and of r…