Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-12-19
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages 4 figures
Scientific paper
The strong-leg S=1/2 Heisenberg spin ladder system (C7H10N)2CuBr4 is investigated using Density Matrix Renormalization Group (DMRG) calculations, inelastic neutron scattering, and bulk magneto-thermodynamic measurements. Measurements showed qualitative differences compared to the strong-rung case. A long-lived two-triplon bound state is confirmed to persist across most of the Brillouin zone in zero field. In applied fields, in the Tomonaga-Luttinger spin liquid phase, elementary excitations are attractive, rather than repulsive. In the presence of weak inter-ladder interactions, the strong-leg system is considerably more prone to 3-dimensional ordering.
Bouillot Pierre
Giamarchi Thierry
Gvasaliya S.
Kollath Corinna
Muhlbauer Sebastian
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