Magnetotransport CuxBi2Se3

Name: Magnetotransport CuxBi2Se3
Published: 2018-01-01T00:00:00Z
License: https://ora.ox.ac.uk/terms_of_use

Documentation:: These data were created by recording the transport behaviour on thin flakes devices at low temperatures and in magnetic field. These are all DAT files easily readable

Related item:: Multi-band magnetotransport in exfoliated thin films of Cu x Bi 2 Se 3
Description:: We report magnetotransport studies in thin (<100nm) exfoliated films of CuxBi2Se3 and we detect an unusual electronic transition at low temperatures. Bulk crystals show weak superconductivity with Tcbacksim3.5K and a possible electronic phase transition around 200K. Following exfoliation, superconductivity is supressed and a strongly temperature dependent multi-band conductivity is observed for T<30K. This transition between competing conducting channels may be enhanced due to the presence of electronic ordering, and could be affected by the presence of an effective internal stress due to Cu intercalation. By fitting to the weak antilocalisation conductivity correction at low magnetic fields we confirm that the low temperature regime maintains a quantum phase coherence length Lphiv > 100nm indicating the presence of topologically protected surface states.

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