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7 papers · 2 filters
Magnetic heat conductivity in : linear temperature dependence
C. Hess, H. ElHaes, A. Waske +5
We present experimental results for the thermal conductivity of the pseudo 2-leg ladder material . The strong buckling of the ladder rungs renders this material…
Edge singularities in high-energy spectra of gapped one-dimensional magnets in strong magnetic fields
A. Friedrich, A. K. Kolezhuk, I. P. McCulloch +1
We use the dynamical density matrix renormalization group technique to show that the high-energy part of the spectrum of a S=1 Haldane chain, placed in a strong external magnetic f…
Mott-Hubbard exciton in the optical conductivity of YTiO3 and SmTiO3
A. Gössling, R. Schmitz, H. Roth +5
In the Mott-Hubbard insulators YTiO3 and SmTiO3 we study optical excitations from the lower to the upper Hubbard band, d^1d^1 -> d^0d^2. The multi-peak structure observed in the op…
Kondo-transport spectroscopy of single molecule magnets
C. Romeike, M. R. Wegewijs, W. Hofstetter +1
We demonstrate that in a single molecule magnet (SMM) strongly coupled to electrodes the Kondo effect involves all magnetic excitations. This Kondo effect is induced by the quantum…
The fate of orbitons coupled to phonons
K. P. Schmidt, M. Grüninger, G. S. Uhrig
The key feature of an orbital wave or orbiton is a significant dispersion, which arises from exchange interactions between orbitals on distinct sites. We study the effect of a coup…
Quenched charge disorder in CuO2 spin chains: Experimental and numerical studies
R. Leidl, R. Klingeler, B. Buechner +2
We report on measurements of the magnetic response of the anisotropic CuO_2 spin chains in lightly hole-doped La_x (Ca,Sr)_14-x Cu_24 O_41, x>=5. The experimental data suggest that…