Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Poster Session: Correlated Electrons 1
TT 19.39: Poster
Montag, 20. März 2017, 15:00–19:00, P2-EG
Thermodynamics of spin fractionalization in Kitaev matter — •Tim Eschmann and Simon Trebst — Institute for Theoretical Physics, University of Cologne
The fractionalization of quantum numbers is one of the most intriguing phenomena in quantum many-body systems. Here we study the thermodynamic signatures of spin fractionalization in Kitaev models in two and three spatial dimensions by means of numerically exact quantum Monte Carlo techniques. Analytically, the fractionalization of the original spin degrees of freedom into itinerant Majorana fermions and a static Z2 gauge field is well understood at zero temperature and has led to a comprehensive classification of the emergent Majorana metals for a variety of two and three-dimensional lattices relevant to a number of spin-orbit dominated materials. Here, we put our focus on the physics of the Z2 gauge field and discuss the finite-temperature phase transitions associated with the ordering of the gauge field in three spatial dimensions.