Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1999-03-05
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
1 page, minor calculational error repaired
Scientific paper
10.1103/PhysRevLett.83.4223
In a recent letter M. Lilly et al [PRL 82, 394 (1999)] have shown that a highly anisotropic state can arise in certain two dimensional electron systems. In the large square samples studied, resistances measured in the two perpendicular directions are found to have a ratio that may be 60 or larger at low temperature and at certain magnetic fields. In Hall bar measurements, the anisotropy ratio is found to be much smaller (roughly 5). In this comment we resolve this discrepancy by noting that the anisotropy of the underlying sheet resistivities is correctly represented by Hall bar resistance measurements but shows up exponentially enhanced in resistance measurements on square samples due to simple geometric effects. We note, however, that the origin of this underlying resistivity anisotropy remains unknown, and is not addressed here.
No associations
LandOfFree
Comment on ``Evidence for Anisotropic State of Two-Dimensional Electrons in High Landau Levels'' does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Comment on ``Evidence for Anisotropic State of Two-Dimensional Electrons in High Landau Levels'', we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comment on ``Evidence for Anisotropic State of Two-Dimensional Electrons in High Landau Levels'' will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-617173