Title:

Author:

Submitted Accepted Published Unpublished

Journal:

Vol. Page Year

Note:

Abstract:
Magnetotransport measurements on two-dimensional hole gas samples revealed anomalous behavior at low temperatures in two specific regions of Landau level filling v. Although the fractional quantum Hall (FQH) states develop normally as temperature is lowered down to ~ 100 mK, the zero resistance state around v ^ 1/3 becomes unstable as temperature is further lowered and aperiodic fluctuations develop. By contrast, the v = 2/3 and other FQH states seem to be intact down to the lowest temperature ( 20 mK). Another anomalous behavior is observed in the range 1 < v < 2, where resistance fluctuations develop below ~ 400 mK, which overwhelm the FQH features at v = 5/3 or 4/3. The physical origin of these anomalies is yet to be identified.

Password:

Filename:

Password:

Password: