Fristsch, K. (2013). New Neutron Scattering Results on the Enigmatic Ground State of the Pyrochlore Magnet Tb2Ti2O7. Perimeter Institute. https://pirsa.org/13040136
MLA
Fristsch, Katharina. New Neutron Scattering Results on the Enigmatic Ground State of the Pyrochlore Magnet Tb2Ti2O7. Perimeter Institute, Apr. 25, 2013, https://pirsa.org/13040136
BibTex
@misc{ pirsa_PIRSA:13040136,
doi = {10.48660/13040136},
url = {https://pirsa.org/13040136},
author = {Fristsch, Katharina},
keywords = {Condensed Matter},
language = {en},
title = {New Neutron Scattering Results on the Enigmatic Ground State of the Pyrochlore Magnet Tb2Ti2O7},
publisher = {Perimeter Institute},
year = {2013},
month = {apr},
note = {PIRSA:13040136 see, \url{https://pirsa.org}}
}
The ground state of the candidate spin liquid pyrochlore magnet Tb2Ti2O7 (TTO) has been long debated. Despite theoretical expectations of magnetic order below ~1K based on classical Ising-like Tb3+ spins, earlier muSR and neutron scattering experiments showed no long range order down to 50mK. This motivated two theoretical scenarios to account for the apparently disordered ground state: a quantum spin ice scenario and a non-magnetic singlet ground state. I will discuss new neutron scattering measurements on TTO that show short range spin correlations developing below ~ 0.5 K with a (½, ½, ½) ordering wavevector, and a concomitant opening of a spin gap across most of the Brillouin zone. Our measurements also refine the crystal field ground state for Tb3+ in TTO and in its sister, “soft” spin ice compound Tb2Sn2O7.
