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15 papers · 2 filters
NMR and LDA evidence for spiral magnetic order in the chain cuprate LiCu2O2
A. A Gippius, E. N. Morozova, A. S. Moskvin +5
We report on {6,7}Li nuclear magnetic resonance measurements of the spin-chain compound LiCu2O2 in the paramagnetic and magnetically ordered states. Below T about 24 K the NMR line…
Unconventional Superconductivity and Magnetism in Lanthanide and Actinide Intermetallic Compounds
Peter Thalmeier, Gertrud Zwicknagl
In this review article we present a survey of unconventional superconductors and their coexistence behaviour with magnetism. We focus on Ce- and U-based heavy fermion superconducto…
Reduced density matrices, their spectral resolutions, and the Kimball-Overhauser approach
P. Ziesche, F. Tasnadi
Recently, it has been shown, that the pair density of the homogeneous electron gas can be parametrized in terms of 2-body wave functions (geminals), which are scattering solutions…
Finite temperature properties and frustrated ferromagnetism in a square lattice Heisenberg model
Nic Shannon, Burkhard Schmidt, Karlo Penc +1
The spin 1/2 Heisenberg model on a square lattice with antiferromagnetic nearest- and next-nearest neighbour interactions (the -- model) has long been studied as a paradi…
Volume contraction at the Jahn-Teller transition of LaMnO
T. Maitra, P. Thalmeier, T. Chatterji
We have studied the volume collapse of LaMnO at the Jahn- Teller (JT) transition temperature T=750 K which has recently been found in high temperature powder x- ray and…
Interplay between Freezing and Superconductivity in the Optimally Doped LaEu0.20Sr0.15CuO4 under Hydrostatic Pressure
B. Simovic, M. Nicklas, P. C. Hammel +3
We study the electronic properties of a LaEu0.20Sr0.15CuO4 single crystal under hydrostatic pressure up to 2.9 GPa. Both the freezing of the Cu 3d moments and the structural transi…