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Superconductivity in MBE grown InN

Gunes, Mustafa and Balkan, Naci and Tiras, Engin and Ardali, Sukru and Ajagunna, A O and Iliopoulos, Eleftherios and Georgakilas, A (2011) 'Superconductivity in MBE grown InN.' physica status solidi (c), 8 (5). pp. 1637-1640. ISSN 1862-6351

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Abstract

We present the experimental investigation of superconductivity in unintentionally doped MBE grown InN samples with various InN film thicknesses. A significant change in resistivity was observed at 3.82 K, for an 1080 nm InN layer with carrier concentration n3D=1.185x1019 cm-3. However, no significant resistance change was observed in the case of InN samples with carrier density of 1.024x1019 cm-3, 1.38x1019 cm-3, and thicknesses of 2070 and 4700 nm, respectively. The carrier density of all investigated samples was within the range of values between the Mott transition (2x1017 cm-3) and the superconductivity to metal transition (7x1020 cm-3). We believe that at lower temperatures (3He) which we cannot achieve with our set-up, the phase transition in other samples is likely to be observed. The origin of the observed anisotropic type-II superconductivity is discussed

Item Type: Article
Uncontrolled Keywords: InN; superconductivity; Mott transition; critical magnetic field
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Jim Jamieson
Date Deposited: 05 Mar 2012 16:59
Last Modified: 05 Mar 2012 16:59
URI: http://repository.essex.ac.uk/id/eprint/2247

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