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Träfflista för sökning "WFRF:(Liu Zhongfan) srt2:(2016)"

Sökning: WFRF:(Liu Zhongfan) > (2016)

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1.
  • Du, J., et al. (författare)
  • Probe of local impurity states by bend resistance measurements in graphene cross junctions
  • 2016
  • Ingår i: Nanotechnology. - : IOP Publishing. - 0957-4484 .- 1361-6528. ; 27:24
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on low-temperature transport measurements on four-terminal cross junction devices fabricated from high-quality graphene grown by chemical vapor deposition. At high magnetic fields, the bend resistance reveals pronounced peak structures at the quantum Hall plateau transition, which can be attributed to the edge state transport through the junctions. We further demonstrate that the bend resistance is drastically affected by the presence of local impurity states in the junction regions, and exhibits an unusual asymmetric behavior with respect to the magnetic field direction. The observations can be understood in a model taking into account the combination of the edge transport and an asymmetric scatterer. Our results demonstrate that a graphene cross junction may serve as a sensitive probe of local impurity states in graphene at the nanoscale.
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2.
  • Jing, Yumei, et al. (författare)
  • Weak antilocalization and electron-electron interaction in coupled multiple-channel transport in a Bi2Se3 thin film.
  • 2016
  • Ingår i: Nanoscale. - : Royal Society of Chemistry (RSC). - 2040-3372 .- 2040-3364. ; 8:4, s. 1879-1885
  • Tidskriftsartikel (refereegranskat)abstract
    • The electron transport properties of a topological insulator Bi2Se3 thin film are studied in Hall-bar geometry. The film with a thickness of 10 nm is grown by van der Waals epitaxy on fluorophlogopite mica and Hall-bar devices are fabricated from the as-grown film directly on the mica substrate. Weak antilocalization and electron-electron interaction effects are observed and analyzed at low temperatures. The phase-coherence length extracted from the measured weak antilocalization characteristics shows a strong power-law increase with decreasing temperature and the transport in the film is shown to occur via coupled multiple (topological surface and bulk states) channels. The conductivity of the film shows a logarithmical decrease with decreasing temperature and thus the electron-electron interaction plays a dominant role in quantum corrections to the conductivity of the film at low temperatures.
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  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (2)
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refereegranskat (2)
Författare/redaktör
Peng, Hailin (2)
Liu, Zhongfan (2)
Xu, Hongqi (1)
Zhang, Kai (1)
Du, J (1)
Xu, H. Q. (1)
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Li, J. Y. (1)
Kang, N. (1)
Lin, Li-Yen (1)
Huang, Shaoyun (1)
Jing, Yumei (1)
Wu, Jinxiong (1)
Guo, Yunfan (1)
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Lunds universitet (2)
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Engelska (2)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (2)
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2016 (2)Ta bort avgränsningen

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