Quantum magnetism and criticality
arXiv:0711.3015 · doi:10.1038/nphys894
Abstract
Magnetic insulators have proved to be fertile ground for studying new types of quantum many body states, and I survey recent experimental and theoretical examples. The insights and methods transfer also to novel superconducting and metallic states. Of particular interest are critical quantum states, sometimes found at quantum phase transitions, which have gapless excitations with no particle- or wave-like interpretation, and control a significant portion of the finite temperature phase diagram. Remarkably, their theory is connected to holographic descriptions of Hawking radiation from black holes.
39 pages, 10 figures, review article for non-specialists; (v2) added clarifications and references; (v3) minor corrections; (v4) added footnote on hydrodynamic long-time tails
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Cited by in corpus (7)
- Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3
- Impure AdS/CFT
- From itinerant to local-moment antiferromagnetism in Kondo lattices: Adiabatic continuity vs. quantum phase transitions
- Destruction of Neel order in the cuprates by electron-doping
- Black holes and universality classes of critical points
- Imaging bond order near non-magnetic impurities in square lattice antiferromagnets
- Deconfined quantum criticality driven by Dirac fermions in SU(2) antiferromagnets