Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 18: Correlated Electrons: Spin Systems and Itinerant Magnets – Frustrated Magnets 2 (jointly with MA)
TT 18.4: Vortrag
Montag, 16. März 2015, 15:45–16:00, H 3005
Orphan glassiness in a disordered spin liquid — •Jorge Armando Rehn1, Arnab Sen2, Alexei Andreanov1, Kedar Damle3, Roderich Moessner1, and Antonello Scardicchio4 — 1Max Planck Institute for the Physics of Complex Systems, Dresden — 2Indian Association for the Cultivation of Science, Kolkata — 3Tata Institute of Fundamental Research, Mumbai — 4The Abdus Salam ICTP, Trieste
The random dilution of non-magnetic impurities in systems presenting a classical spin liquid phase leads to interesting new physics: certain spins in direct proximity to vacancies are known to be fractionalized, and to create an extended spin texture on its neighborhood. A mapping of the pure spin system to a distribution of fluxes living on a dual bipartite lattice enables understanding of the thermal excitations as emerging Coulomb charges. Using this mapping it is also possible to interpret the diluted system in terms of charges, which are not entropically generated, but induced by the vacancies. The effective picture obtained at low temperatures for the diluted system neglects entropically generated charges and considers only the randomly placed long ranged interacting charges induced by the vacancies. A study of this effective model and the possibility of a glassy phase in this system will be presented on this talk.