期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.135701
关键词
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资金
- Dutch Science Foundation NWO/FOM
- ERC Advanced Investigator Grant
- EU network NanoCTM
We study the phase diagram of the quantum Hall effect in four-dimensional (4D) space. Unlike in 2D, in 4D there exists a metallic as well as an insulating phase, depending on the disorder strength. The critical exponent nu approximate to 1.2 of the diverging localization length at the quantum Hall insulator-to-metal transition differs from the semiclassical value nu = 1 of 4D Anderson transitions in the presence of time-reversal symmetry. Our numerical analysis is based on a mapping of the 4D Hamiltonian onto a 1D dynamical system, providing a route towards the experimental realization of the 4D quantum Hall effect.
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