Low energy excitations in Tb<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> with [111] magnetic field

ORAL

Abstract

The pyrochlore magnet Tb2Ti2O7 has shown exotic magnetic properties and has been considered to be a quantum spin liquid. Although Tb2Ti2O7 has been studied for decades, low energy experiments with magnetic field along [111] are rare. We perform time-domain terahertz spectroscopy on high quality Tb2Ti2O7 crystal to study the crystal field excitations as a function of magnetic field with very high resolution. The excitations behaves significantly different below and above a critical field, indicating a phase transition around 2.5 T. We also observed the discrepancy between two polarization channels. Our work provides insight into this very intriguing material.

*Supported by the Institute for Quantum Matter under DOE EFRC grant DE-SC0019331

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Presenters

  • Xinshu Zhang

    • Johns Hopkins University

Authors

  • Xinshu Zhang

    • Johns Hopkins University

  • Seyed Koohpayeh

    • Johns Hopkins University

  • Peter Armitage

    • Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218
    • Johns Hopkins University
    • Institute of Quantum Matter, Department of Physics and Astronomy, Johns Hopkins University