PIRSA:17060035  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Lobed phase diagram of single crystalline Yb2Ti2O7 in [111] magnetic field
Speaker(s): Collin Broholm
Abstract: High quality single crystals of Yb2Ti2O7 synthesized using a traveling solvent floating zone method enable experiments that explore the anisotropic temperature-field phase diagram of this quantum spin ice candidate. We have examined the H//(111) orientation, which is interesting because a phase transition that breaks three fold rotation symmetry is possible in the presence of a magnetic field. Using specific heat, magnetization, and neutron diffraction we find an apparent enhancement of the critical temperature with applied field that is not accounted for by a classical Monte Carlo simulation of the established spin hamiltonian. I shall discuss possible explanations for the discrepancy, which include quantum fluctuations and long range dipolar interactions.
Date: 07/06/2017 - 2:25 pm
Valid XHTML 1.0!