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Spectral and Thermodynamic Properties of a Strong-Leg Quantum Spin Ladder

Authors
Schmidiger, D.
Mühlbauer, S.
Gvasaliya, S.
Zheludev, A.
Published in Physical Review Letters. 2012, vol. 108, no. 16
Abstract The strong-leg S=1/2 Heisenberg spin ladder system (C7H10N)2CuBr4 is investigated using density matrix renormalization group calculations, inelastic neutron scattering, and bulk magnetothermodynamic 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 a zero field. In applied fields, in the Tomonaga-Luttinger spin-liquid phase, elementary excitations are attractive, rather than repulsive. In the presence of weak interladder interactions, the strong-leg system is considerably more prone to three-dimensional ordering
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SCHMIDIGER, D. et al. Spectral and Thermodynamic Properties of a Strong-Leg Quantum Spin Ladder. In: Physical Review Letters, 2012, vol. 108, n° 16. https://archive-ouverte.unige.ch/unige:35936

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Deposited on : 2014-04-22

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