Séminaire du LPTMS: Salvatore Manmana


11:00 - 12:00

LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay
15 Rue Georges Clemenceau, Orsay, 91405

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Finite-temperature dynamics in low-dimensional quantum magnets

Salvatore Manmana (University of Göttingen, Germany)

Quantum magnetic materials are a fascinating research topic, which  explores novel behavior in quantum systems caused by strong  correlations. In my talk, I will review basic properties of such strongly correlated quantum magnets. A particular focus is given to  dynamical properties, which reveal the elementary excitations and their  properties. An interesting aspect here is the effect of temperature.  This is discussed for one-dimensional systems. In particular, the finite-temperature dynamics in the antiferromagnetic spin-one chain is discussed, which considerably is one of the most fundamental quantum many-body systems, with symmetry protected topological order in the ground state. Increasing the temperature leads to additional structures  in the dynamical response functions, which we propose to measure in experiments.

Reference :

  • Jonas Becker, Thomas Köhler, Alexander C. Tiegel, Salvatore R. Manmana, Stefan Wessel and Andreas Honecker, Finite-temperature dynamics and thermal intra-band magnon scattering in Haldane spin-one chains,  preprint cond-mat arXiv:1703.04652
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