SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 9: Poster Session: Correlated Electrons
TT 9.12: Poster
Dienstag, 28. September 2021, 13:30–16:00, P
Orientation dependence of the transverse-field Ising transition in LiHoF4 — •Andreas Wendl1, Heike Eisenlohr2, Felix Rucker1, Christopher Duvinage1, Markus Kleinhans1, Matthias Vojta2, and Christian Pfleiderer1,3,4 — 1Physik Department, TU München, Garching, Germany — 2Institut für Theoretische Physik and Würzburg-Dresden Cluster of Excellence ct.qmat, TU Dresden, Dresden, Germany — 3Centre for QuantumEngineering (ZQE), TU München, Garching, Germany — 4Munich Centre for Quantum Science and Technology (MCQST), TU München, Garching, Germany
The perhaps best understood example of a quantum critical point is the response of the dipolar Ising ferromagnet LiHoF4 to a transverse field [1-3]. We report an investigation of the AC susceptibility of LiHoF4 as a function of the magnetic field direction relative to the hard magnetic axis, deriving the evolution of the magnetic-phase-diagram as a function of field orientation. We discuss our findings in terms of a theoretical model taking quantiatively into account the non-Kramers nature of the Ho ions, the effects of hyperfine coupling and the presence of magnetic domains.
[1] D. Bitko et al., Phys. Rev. Lett. 77, 940 (1996)
[2] H. M. Rønnow et al., Science 308, 389 (2005)
[3] P. B. Chakraborty et al., Phys. Rev. B 70, 144411 (2004)