Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 72: Correlated Electrons: Frustrated Magnets - General 2
TT 72.9: Vortrag
Donnerstag, 23. März 2017, 17:15–17:30, HSZ 204
The spin-1/2 Kagome XXZ model in a field: competition between lattice nematic and solid orders — •Augustine Kshetrimayum1, Thibaut Picot2, Román Orús1, and Didier Poilblanc2 — 1Institute of Physics, Johannes Gutenberg University, 55099 Mainz, Germany — 2Laboratoire de Physique Théorique, IRSAMC, CNRS and Université de Toulouse, UPS, F-31062 Toulouse, France
We study numerically the spin-1/2 XXZ model in a field on an infinite Kagome lattice. We use different algorithms based on infinite Projected Entangled Pair States (iPEPS) for this, namely: (i)an approach with simplex tensors and 9-site unit cell, and (ii) an approach based on coarse-graining three spins in the Kagome lattice and mapping it to a square-lattice model with local and nearest-neighbor interactions, with usual PEPS tensors, 6- and 12-site unit cells. We observe the emergence of several magnetization plateaus as a function of the field for different values of the anisotropy. We focus on the 1/3 plateaus using both the techniques and study the nature of its ground state as we tune the anisotropy from the Ising regime to the XY regime through the Heisenberg point and find a strong competition between lattice nematic and solid orders.