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Tunable insulator-quantum Hall transition in a weakly interacting two-dimensional electron system.
| Content Provider | Europe PMC |
|---|---|
| Author | Lo, Shun-Tsung Wang, Yi-Ting Lin, Sheng-Di Strasser, Gottfried Bird, Jonathan P Chen, Yang-Fang Liang, Chi-Te |
| Copyright Year | 2013 |
| Abstract | We have performed low-temperature measurements on a gated two-dimensional electron system in which electron–electron (e-e) interactions are insignificant. At low magnetic fields, disorder-driven movement of the crossing of longitudinal and Hall resistivities (ρxx and ρxy) can be observed. Interestingly, by applying different gate voltages, we demonstrate that such a crossing at ρxx ~ ρxy can occur at a magnetic field higher, lower, or equal to the temperature-independent point in ρxx which corresponds to the direct insulator-quantum Hall transition. We explicitly show that ρxx ~ ρxy occurs at the inverse of the classical Drude mobility 1/μD rather than the crossing field corresponding to the insulator-quantum Hall transition. Moreover, we show that the background magnetoresistance can affect the transport properties of our device significantly. Thus, we suggest that great care must be taken when calculating the renormalized mobility caused by e-e interactions. |
| ISSN | 19317573 |
| Journal | Nanoscale Research Letters |
| Volume Number | 8 |
| PubMed Central reference number | PMC3716820 |
| Issue Number | 1 |
| PubMed reference number | 23819745 |
| e-ISSN | 1556276X |
| DOI | 10.1186/1556-276x-8-307 |
| Language | English |
| Publisher | Springer |
| Publisher Date | 2013-07-03 |
| Access Restriction | Open |
| Rights License | This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright ©2013 Lo et al.; licensee Springer. |
| Subject Keyword | Hall effect Magnetoresistance Electrons Direct insulator-quantum hall transition |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology Condensed Matter Physics Materials Science |
