Groupe de Physique Statistique

Equipe 106, Institut Jean Lamour

                     
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Séminaire de groupe

Kagome quantum antiferromagnets studied by tensor network methods
Thibaut Picot
Laboratoire de Physique Theorique, Toulouse
jeudi 18 décembre 2014 , 10h30
Salle de séminaire du groupe de Physique Statistique

Optimizing translationally invariant infinite-Projected Entangled Pair States (iPEPS), we investigate the spin-2 Affleck-Kennedy-Lieb-Tasaki (AKLT) and spin-1 Heisenberg models on the Kagome lattice as a function of magnetic field. We found that the magnetization curves offer a wide variety of compressible and incompressible phases. Incompressible nematic phases give rise to magnetization plateaux at reduced magnetization mz = 5/6 and mz = 1/3 for spin-2 and spin-1, respectively, in addition to the mz = 0 plateaux characteristic of zero-field gapped spin liquids. Moving away from the plateaux we observe a rich variety of compressible superfluid nematic – named “supernematic” – . Ref: http://arxiv.org/pdf/1406.7205.pdf



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