PIRSA:13040136

New Neutron Scattering Results on the Enigmatic Ground State of the Pyrochlore Magnet Tb2Ti2O7

Fristsch, K. (2013). New Neutron Scattering Results on the Enigmatic Ground State of the Pyrochlore Magnet Tb2Ti2O7. Perimeter Institute. https://pirsa.org/13040136

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 

          @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}}
          }

Katharina Fristsch McMaster University

DOI 10.48660/13040136
Collection
Talk Type Conference
Subject

Abstract

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.