TITLE

Superconductivity in heavily compensated Mg-doped InN

AUTHOR(S)
Tiras, E.; Gunes, M.; Balkan, N.; Airey, R.; Schaff, W. J.
PUB. DATE
April 2009
SOURCE
Applied Physics Letters;4/6/2009, Vol. 94 Issue 14, p142108
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report superconductivity in Mg-doped InN grown by molecular beam epitaxy. Superconductivity phase transition temperature occurs Tc=3.97 K as determined by magnetoresistance and Hall resistance measurements. The two-dimensional (2D) carrier density of the measured sample is n2D=9×1014 cm-2 corresponding to a three-dimensional (3D) electron density of n3D=1.8×1019 cm-3 which is within the range of values between Mott transition and the superconductivity to metal transition. We propose a plausible mechanism to explain the existence of the superconductivity in terms of a uniform distribution of superconducting InN nanoparticles or nanosized indium dots forming microscopic Josephson junctions in the heavily compensated insulating bulk InN matrix.
ACCESSION #
37580303

 

Related Articles

  • Effect of MnAs/GaAs(001) film accommodations on the phase-transition temperature. Iikawa, F.; Brasil, M. J. S. P.; Couto, O. D. D.; Adriano, C.; Giles, C.; Däweritz, L. // Applied Physics Letters;9/20/2004, Vol. 85 Issue 12, p2250 

    The phase-transition temperature of MnAs epitaxial films grown by molecular-beam epitaxy on GaAs(001) with different crystalline accommodations was studied by specular and grazing incidence x-ray diffraction. The transition temperature of MnAs films with tilted hexagonal c-axis orientations with...

  • Phase-locking in series arrays of Josephson junctions shunted by a complex load. Meyer, H.-G.; Krech, W. // Journal of Applied Physics;9/15/1990, Vol. 68 Issue 6, p2868 

    Examines the phase-locking in a large series array of Josephson junctions with a finite McCumber parameter shunted by a complex load. Application of the Stewart-Mccumber model to the phase-locked array; Stability of the different operation modes appearing in the array; Influence of the thermal...

  • Current-driven Josephson junction phase transitions. Drummond, P. D. // Journal of Applied Physics;4/15/1988, Vol. 63 Issue 8, p2730 

    Presents information on a study which examined the voltage characteristics and phase transitions of an externally shunted current driven Josephson junction. Technique used in the study; Basic junction equations; Analysis of the nonlinear properties of a Josephson junction coupled to external...

  • Phase transitions in Josephson junction arrays in a weak magnetic field. Chen, Qing-Hu; Liu, Huan; Lv, Jian-Ping // Journal of Applied Physics;May2009, Vol. 105 Issue 9, p093919-1 

    Based on the resistively shunted junction dynamics, we numerically investigate the superconducting phase transitions of two-dimensional Josephson junction arrays exposed to a dilute external field with the magnetic flux density f=1/25. Dynamic scaling analysis of current-voltage characteristics...

  • Bulk-SQUID effect in a discrete superconductor as a consequence of generation frequency locking in constituent josephson junctions. Ginzburg, S.; Nakin, A.; Savitskaya, N. // Journal of Experimental & Theoretical Physics;Feb2012, Vol. 114 Issue 2, p273 

    The theory of the bulk-SQUID effect in discrete superconductors is constructed for the first time. It is shown that the bulk-SQUID effect emerges in the system of 2D intrinsically stochastic multijunction SQUID (i.e., with random values of critical currents of the junctions, injection currents,...

  • Superconductivity of Bi Confined in an Opal Host. Johnson, R.; Nieskoski, M.; Disseler, S.; Huber, T.; Graf, M. // Journal of Low Temperature Physics;Feb2013, Vol. 170 Issue 3/4, p205 

    Superconductivity is observed in a composite of rhombohedral crystalline bismuth nanoparticles imbedded in an insulating porous opal host via electrical transport and AC magnetic susceptibility. The onset of superconductivity in this system occurs in two steps, with upper transition temperature...

  • Investigation of anomalous magnetoresistance in topological insulator Bi2Te3 at the onset of superconductivity in indium contacts. Hagmann, J. A.; Liu, X.; Dobrowolska, M.; Furdyna, J. K. // Journal of Applied Physics;May2013, Vol. 113 Issue 17, p17C724 

    Presented here is evidence that suggests induced superconductivity in topological insulator Bi2Te3 occurring at its interface with indium (In) contacts. Thin Bi2Te3 films of several thicknesses were grown by molecular beam epitaxy and were studied by magnetotransport measurements using In as...

  • Giant reversible magnetocaloric effect in antiferromagnetic superconductor Dy0.9Tm0.1Ni2B2C compound. Li, Lingwei; Nishimura, Katsuhiko // Applied Physics Letters;9/28/2009, Vol. 95 Issue 13, p132505 

    The magnetic properties and magnetocaloric effect in antiferromagnetic superconductor Dy0.9Tm0.1Ni2B2C compound have been studied. The magnetic phase transition TM (∼9.2 K) occurs above the superconducting transition temperature Tc (∼4.5 K). A giant reversible magnetocaloric effect has...

  • Unusual superconductivity up to 49 K in single crystalline R-doped CaFe2As2 (Ca122) at ambient with R = rare earth. Chu, C. W. // EPJ Web of Conferences;2012, Issue 23, p1 

    The discovery in 2008 of the Fe-pnictide and Fe-chalcogenide superconductors has generated immense interest. They crystallize in four different structures, namely, the 1111-phase (RFeAsO, where R = rare earth) with the ZrCuSiAs structure (P4/nmm); the 122-phase (AeFe2As2 and AFe2As2, where Ae =...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics