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Quantum magnets and glasses

Rosenbaum, Thomas F. (1996) Quantum magnets and glasses. Journal of Physics: Condensed Matter, 8 (48). pp. 9759-9772. ISSN 0953-8984. doi:10.1088/0953-8984/8/48/007.

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We explore the behaviour of the dipolar-coupled Ising magnet, LiHo_xY_(1-x)F_4, in a transverse magnetic field. The transverse field, applied perpendicular to the Ising axis, introduces quantum channels for relaxation, thereby continuously depressing the spin-ordering temperature to zero. We compare the classical (thermally driven) and the quantum (transverse-field-driven) transitions for both the pure ferromagnet, LiHoF_4, and the spin glass, LiHo_(0.167)Y_(0.833)F_4, and we discuss the implications of these results for the T = 0 disordered ferromagnet (x = 0.5). Finally, we contrast these high-resolution studies of model quantum transitions in insulating magnets with the quantum critical behaviour of the highly correlated Mott-Hubbard metals V_2O_3 and Ni(S, Se)_2.

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Additional Information:© 1996 IOP Publishing. Received 3 September 1996. The experiments on Li(Ho, Y)F_4 were conceived and performed with Gabriel Aeppli. The contributions of D H Reich, W Wu, and D Bitko have been indispensable. The work reported here on V_2O_3 and Ni(S, Se)_2 has been led by A Husmann and D S Jin, with crystals and inspiration from J M Honig. I thank them and my many collaborators whose names can be found in the references. The work at the University of Chicago was supported by the MRSEC Program of the National Science Foundation under Award No DMR-9400379 and by NSF Grant No DMR95-07873.
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Issue or Number:48
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46988
Deposited By: George Porter
Deposited On:08 Jul 2014 21:49
Last Modified:12 Jul 2022 16:15

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