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Quantum Spin Glass Transition in LiHo$_x$Y$_{1-x}$F$_4$: Insights from Entangled Spins

Explore the LiHo$_x$Y$_{1-x}$F$_4 family of materials, a quantum spin model illuminating the glassy state with nonlinear magnetic susceptibility observations revealing a spin-glass transition. Discover how entangled spins impact quantum dynamics in this system under high-field conditions. Supported by NSF MRSEC program DMR-0213745.

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Quantum Spin Glass Transition in LiHo$_x$Y$_{1-x}$F$_4$: Insights from Entangled Spins

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  1. The Quantum Glass Transition in LiHoxY1-xF4 Ka Yee C. Lee, University of Chicago, DMR 0820054 Research on spin glasses has led to deep insights into disordered materials and the glassy state. The LiHoxY1-xF4 family of materials (depicted above) represents the simplest quantum spin model, the Ising magnet in a transverse field. Rosenbaum and colleagues at the University of Chicago MRSEC measured the nonlinear magnetic susceptibility of this system and observed a spin-glass transition in the presence of entangled spins. In the high-field regime, where quantum fluctuations play a major role, the presence of entangled spin clusters slow the effective timescales for the tunneling processes that dominate the quantum dynamics. Work made possible through the NSF MRSEC program, DMR-0213745.

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