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Novel metallic and insulating states at a bent quantum Hall junction | | M. Grayson
; L. Steinke
; D. Schuh
; M. Bichler
; L. Hoeppel
; J. Smet
; K. v. Klitzing
; D. K. Maude
; G. Abstreiter
; | | Date: |
13 Jan 2007 | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated
Electrons | | Abstract: | A non-planar geometry for studying quantum Hall physics is studied, whereby two quantum Hall (QH) systems are joined at a sharp right angle. At the junction of the two incompressible QH states, a one-dimensional conducting state is expected. Experimentally this junction conductance is observed to vary with the filling factor nu that characterizes the incompressible facets. One state at nu = 1/3 is observed to be metallic -- the conductance increases as the temperature T drops. Another state at nu = 1, 2 is strongly insulating as a function of temperature, and yet another state at nu = 3, 4 shows only weak temperature dependence. Upon applying a dc voltage bias along the junction, the differential conductance again shows three qualitatively different behaviors. Differences from planar QH structures are highlighted. | | Source: | arXiv, cond-mat/0701295 | | Services: | Forum | Review | PDF | Favorites | |
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