405 citations · 1.8k across the 36 of their papers we have counts for
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Superconductivity and Dirac Fermions in 112-phase Pnictides
S. J. Ray, L. Alff
This article reviews the status of current research on the 112-phase of pnictides. The 112-phase has gained augmented attention due to the recent discovery of high-temperature supe…
Superconductivity phase diagrams of electron doped cuprates R(2-x)CexCuO4 (R = La, Pr, Nd, Sm, and Eu)
Y. Krockenberger, J. Kurian, A. Winkler +3
The superconductivity phase diagrams of electron doped cuprates of the form R(2-x)CexCuO4 (with R= La, Pr, Nd, Sm, and Eu) have been determined for cerium compositions 0 < x < 0.36…
Superconductivity in epitaxial thin films of NaxCoO2 y D2O
Y. Krockenberger, I. Fritsch, G. Christiani +5
The observation of superconductivity in the layered transition metal oxide NaxCoO2 y H2O (K. Takada et al., Nature 422, 53 (2003)) has caused a tremendous upsurge of scientific int…
Charge Transport and Quantum Phase Transitions in Singlet Superconductor - Ferromagnet - Singlet Superconductor Junctions
Boris Kastening, Dirk K. Morr, Lambert Alff +1
We study the Josephson current, I_J, in a junction consisting of two s-wave superconductors that are separated by a ferromagnetic barrier possessing a magnetic and non-magnetic sca…
New class of T-prime-structure cuprate superconductors
A. Tsukada, Y. Krockenberger, M. Noda +4
High-temperature superconductivity has been discovered in La2-xBaxCuO4 [1], a compound that derives from the undoped La2CuO4 crystallizing in the perovskite T-structure. In this st…
Possible pseudogap behavior of electron doped high-temperature superconductors
S. Kleefisch, B. Welter, M. Naito +3
We have measured the low-energy quasiparticle excitation spectrum of the electron doped high-temperature superconductors (HTS) Nd(1.85)Ce(0.15)CuO(4-y) and Pr(1.85)Ce(0.15)CuO(4-y)…
Transport and Noise Characteristics of Submicron High-Temperature Superconductor Grain-Boundary Junctions
F. Herbstritt, T. Kemen, L. Alff +2
We have investigated the transport and noise properties of submicron YBCO bicrystal grain-boundary junctions prepared using electron beam lithography. The junctions show an increas…
Anomalous Low Temperature Behavior of Superconducting Nd(1.85)Ce(0.15)CuO(4-y)
L. Alff, S. Meyer, S. Kleefisch +5
We have measured the temperature dependence of the in-plane London penetration depth lambda(T) and the maximum Josephson current Ic(T) using bicrystal grain boundary Josephson junc…
Andreev Bound States in High Temperature Superconductors
L. Alff, S. Kleefisch, U. Schoop +5
Andreev bound states (ABS) at the surface of superconductors are expected for any pair potential showing a sign change in different k-directions with their spectral weight dependin…
Observation of Bound Surface States in Grain Boundary Junctions of High Temperature Superconductors
L. Alff, A. Beck, R. Gross +6
We have performed a detailed study of the tunneling spectra of bicrystal grain boundary junctions (GBJs) fabricated from the HTS YBCO, BSCCO, LSCO, and NCCO. In all experiments the…
Superconducting NdCeCuO Bicrystal Grain Boundary Josephson Junctions
S. Kleefisch, L. Alff, U. Schoop +4
We have studied the electric transport properties of symmetrical [001] tilt NdCeCuO bicrystal grain boundary Josephson junctions (GBJs) fabricated on SrTiO bicrystal substrates wit…