206 citations · 3.2k across the 95 of their papers we have counts for
10 papers · 1 filter
Transport through a quantum spin Hall quantum dot
Carsten Timm
Quantum spin Hall insulators, recently realized in HgTe/(Hg,Cd)Te quantum wells, support topologically protected, linearly dispersing edge states with spin-momentum locking. A loca…
Types of topological surface states in nodal noncentrosymmetric superconductors
Andreas P. Schnyder, P. M. R. Brydon, Carsten Timm
Nodal noncentrosymmetric superconductors have topologically nontrivial properties manifested by protected zero-energy surface states. Specifically, it was recently found that zero-…
Josephson effect between triplet superconductors through a ferromagnetic barrier of finite width
Bogusz Bujnowski, Carsten Timm, P. M. R. Brydon
Charge and spin transport in a junction involving two triplet superconductors and a ferromagnetic barrier are studied. We use Bogoliubov-de Gennes wavefunctions to construct the Gr…
Microscopically derived Ginzburg-Landau theory for magnetic order in the iron pnictides
P. M. R. Brydon, Jacob Schmiedt, Carsten Timm
We examine the competition of the observed stripe spin density wave (SDW) with other commensurate and incommensurate SDW phases in a two-band model of the pnictides. Starting from…
Microscopic co-existence of superconductivity and magnetism in Ba1-xKxFe2As2
Erwin Wiesenmayer, Hubertus Luetkens, Gwendolyne Pascua +6
It is widely believed that, in contrast to its electron doped counterparts, the hole doped compound Ba1-xKxFe2As2 exhibits a mesoscopic phase separation of magnetism and supercondu…
Doping dependence of antiferromagnetism in models of the pnictides
Jacob Schmiedt, P. M. R. Brydon, Carsten Timm
We study the doping dependence of the spin-density-wave (SDW) state in four models of the 1111 pnictides. The random-phase approximation is used to determine the ordering temperatu…
Effect of intraband Coulomb repulsion on the excitonic spin-density wave
Björn Zocher, Carsten Timm, P. M. R. Brydon
We present a study of the magnetic ground state of a two-band model with nested electron and hole Fermi surfaces and both interband and intraband Coulomb interactions. Our aim is t…
Topologically protected flat zero-energy surface bands in non-centrosymmetric superconductors
P. M. R. Brydon, Andreas P. Schnyder, Carsten Timm
Nodal non-centrosymmetric superconductors (NCS) have recently been shown to be topologically non-trivial. An important consequence is the existence of topologically protected flat…
Metastable giant moments in Gd-implanted GaN, Si, and sapphire
X. Wang, C. Timm, X. M. Wang +4
We report on Gd ion implantation and magnetic characterization of GaN films on sapphire substrates and of bare sapphire and Si substrates to shed light on the mechanism underlying…
Cotunneling through a magnetic single-molecule transistor based on N\atC60
Nicolas Roch, Romain Vincent, Florian Elste +4
We present an experimental and theoretical study of a magnetic single-molecule transistor based on N@C60 connected to gold electrodes. Particular attention is paid to the regime of…