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41 papers · 1 filter
Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
B. Thielemann, Ch. Rüegg, H. M. Rønnow +12
We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon m…
Renormalization of the antisymmetric tensor field propagator and dynamical generation of the mesons in Resonance Chiral Theory
Karol Kampf, Jiri Novotny, Jaroslav Trnka
We discuss the renormalization of the vector meson propagator within Resonance chiral theory at one loop. Using the particular form of the interaction Lagrangian we show t…
Fermi surface and order parameter driven vortex lattice structure transitions in twin-free YBa2Cu3O7
J. S. White, V. Hinkov, R. W. Heslop +12
We report on small-angle neutron scattering studies of the intrinsic vortex lattice (VL) structure in detwinned YBa2Cu3O7 at 2 K, and in fields up to 10.8 T. Because of the suppres…
Rashba type spin-orbit splitting of quantum well states in ultrathin Pb films
Hugo Dil, Fabian Meier, Jorge Lobo-Checa +3
A Rashba type spin-orbit splitting is found for quantum well states formed in ultrathin Pb films on Si(111). The resulting momentum splitting is comparable to what is found for sem…
Spontaneous exciton condensation in 1T-TiSe2: a BCS-like approach
C. Monney, H. Cercellier, F. Clerc +9
Recently strong evidence has been found in favor of a BCS-like condensation of excitons in 1\textit{T}-TiSe. Theoretical photoemission intensity maps have been generated by the…
Imaging the antiparallel magnetic alignment of adjacent Fe and MnAs thin films
R. Breitwieser, M. Marangolo, J. Luning +5
The magnetic coupling between iron and alpha - MnAs in the epitaxial system Fe/MnAs/GaAs(001) has been studied at the sub-micron scale, using element selective x-ray photoemission…