Experimental Demonstration of Fermi Surface Effects at Filling Factor 5/2
介观与纳米尺度物理
2016-08-31 v1
摘要
Using small wavelength surface acoustic waves (SAW) on ultra-high mobility heterostructures, Fermi surface properties are detected at 5/2 filling factor at temperatures higher than those at which the quantum Hall state forms. An enhanced conductivity is observed at 5/2 by employing sub 0.5 micron wavelength SAW, indicating a quasiparticle mean-free-path substantially smaller than that in the lowest Landau level. These findings are consistent with the presence of a filled Fermi sea of composite fermions, which may pair at lower temperatures to form the 5/2 ground state.
引用
@article{arxiv.cond-mat/0109354,
title = {Experimental Demonstration of Fermi Surface Effects at Filling Factor 5/2},
author = {R. L. Willett and K. W. West and L. N. Pfeiffer},
journal= {arXiv preprint arXiv:cond-mat/0109354},
year = {2016}
}
备注
11 pages, 4 figures