Experimental evidence for a two-dimensional quantized Hall insulator
- Authors
- Hilke, M; Shahar, D; Song, SH; Tsui, DC; Xie, YH; Monroe, D
- Issue Date
- Oct-1998
- Publisher
- MACMILLAN MAGAZINES LTD
- Citation
- NATURE, v.395, no.6703, pp 675 - 677
- Pages
- 3
- Journal Title
- NATURE
- Volume
- 395
- Number
- 6703
- Start Page
- 675
- End Page
- 677
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/29811
- DOI
- 10.1038/27160
- ISSN
- 0028-0836
1476-4687
- Abstract
- The general theoretical definition of an insulator is a material in which the conductivity vanishes at the absolute zero of temperature. In classical insulators, such as materials with a band gap, vanishing conductivities lead to diverging resistivities. But other insulators can show more complex behaviour, particularly in the presence of a high magnetic field, where different components of the resistivity tensor can display different behaviours: the magnetoresistance diverges as the temperature approaches absolute zero, but the transverse (Hall) resistance remains finite. Such a system is known as a Hall insulator(1). Here we report experimental evidence for a quantized(2) Hall insulator in a two-dimensional electron system-confined in a semiconductor quantum well. The Hall resistance is quantized in the quantum unit of resistance h/e(2),, where h is Planck's constant and e the electronic charge. At low fields, the sample reverts to being a normal Hall insulator.
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Collections - College of ICT Engineering > School of Electrical and Electronics Engineering > 1. Journal Articles
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