No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
On the Ising character of the quantum-phase transition in LiHoF4
1.R. Coldea, D. A. Tennant, E. M. Wheeler, E. Wawrzynska, D. Prabhakaran, M. Telling, K. Habicht, P. Smeibidl, and K. Kiefer, “Quantum Criticality in an Ising Chain: Experimental Evidence for Emergent E8 Symmetry,” Science 327, 177-180 (2010).
2.S. Sachdev, Quantum Phase Transitions (University Press, Cambridge, 1999).
4.H. M. Rønnow, J. Jensen, R. Parthasarathy, G. Aeppli, T. F. Rosenbaum, D. F. McMorrow, and C. Kraemer, “Magnetic excitations near the quantum phase transition in the Ising ferromagnet LiHoF4,” Phys. Rev. B 75, 054426-1-8 (2007).
5.J. M. Coey, Magnetism and Magnetic Materials (University Press, Cambridge, 2010).
6.Ph. Phillips, Advanced Solid State Physics (University Press, Cambridge, 2012).
8.R. Skomski and J. M. D. Coey, Permanent Magnetism (Institute of Physics, Bristol, 1999).
9.R. Skomski, Simple Models of Magnetism (University Press, Oxford, 2008).
10.G. Asti and S. Rinaldi, “Singular points in the magnetization curve of a polycrystalline ferromagnet,” J. Appl. Phys. 45, 3600-3610 (1974).
Article metrics loading...
It is investigated how a transverse magnetic field affects the quantum-mechanical character of LiHoF4, a system generally considered as a textbook example for an Ising-like quantum-phase transition. In small magnetic fields, the low-temperature behavior of the ions is Ising-like, involving the nearly degenerate low-lying Jz = ± 8 doublet. However, as the transverse field increases, there is a substantial admixture of states having |Jz| < 8. Near the quantum-phase-transition field, the system is distinctively non-Ising like, and all Jz eigenstates yield ground-state contributions of comparable magnitude. A classical analog to this mechanism is the micromagnetic single point in magnets with uniaxial anisotropy. Since Ho3+ has J = 8, the ion’s behavior is reminiscent of the classical limit (J = ∞), but quantum corrections remain clearly visible.
Full text loading...
Most read this month