Gaulin, B. (2014). Frozen Spin Ice Ground States in the Pyrochlore Magnet Tb2 Ti2 O7. Perimeter Institute for Theoretical Physics. https://pirsa.org/14050019
MLA
Gaulin, Bruce. Frozen Spin Ice Ground States in the Pyrochlore Magnet Tb2 Ti2 O7. Perimeter Institute for Theoretical Physics, May. 01, 2014, https://pirsa.org/14050019
BibTex
@misc{ scivideos_PIRSA:14050019,
doi = {10.48660/14050019},
url = {https://pirsa.org/14050019},
author = {Gaulin, Bruce},
keywords = {},
language = {en},
title = {Frozen Spin Ice Ground States in the Pyrochlore Magnet Tb2 Ti2 O7},
publisher = {Perimeter Institute for Theoretical Physics},
year = {2014},
month = {may},
note = {PIRSA:14050019 see, \url{https://scivideos.org/index.php/pirsa/14050019}}
}
Tb2Ti2O7 was one of the first pyrochlore magnets to be studied as a candidate for a spin liquid or cooperative paramagnet, and its ground state has remained enigmatic for fifteen years. Recent time-of-flight neutron scattering studies have shown that it enters a glassy Spin Ice ground state, characterized by frozen short range order over about 8 conventional unit cells, and the formation of a ~ 0.08 meV gap in its spin excitation spectrum at the appropriate quasi-Bragg wave vectors. I will introduce the relevant Spin Ice physics background, and describe how the experiments are performed. The new H-T phase diagram for Tb2Ti2O7 in a [110] magnetic field will be presented. This shows that its frozen (i.e. glassy) Spin Ice ground state (at low temperature and zero field) and its conventional field-induced ordered phase (at low temperature and high fields) bracket the cooperative paramagnetic phase which generated the original interest in this fascinating magnet.
