Publication No: 5654Search all ORC publications    

Superconductivity in centimeter length Indium-Gallium nanowires

Weiwei Zhao1,2, Jesse Bischof1,3, Meenakshi Singh1,2, Thomas C.Fitzgibbons1,3, Xin Liu1,2, Chaoxing Liu1,2, Lin Wang4, Zhonghou Cai5, Si Chen5, John Hayes6, Pier Sazio6,
John Badding1,3 and Moses H.W.Chan1,2

1. Center for Nanoscale Science, The Pennsylvania State University, USA
2. Department of Physics, The Pennsylvania State University, USA
3. Department of chemistry, The Pennsylvania State University, USA
4. HPSync, Carnegie Institution of Washington, USA
5. Advanced Photon Source, Argonne National Laboratory, USA
6. Optoelectronics Research Centre, University of Southampton, UK

Abstract

In-doped Ga nanowires ~150 nm in diameter and ~6mm in length have been formed in silica nanocapillaries. X-ray fluorescence and diffraction measurements performed at the Advanced Photon Source have been used to characterize their chemical composition and crystal structure. Investigation of the low temperature transport properties of these wires reveals a two stage superconducting transition. Magnetoresistance measurements are suggestive of vortex trapping in the wire. The X-ray fluorescence measurements suggest phase separation in the capillaries into Ga nanodroplets and In-Ga eutectic wires. A model to explain the vortex trapping consistent with this observation is being developed.

Acknowledgement
This work is supported by the Penn State Materials Research Science and Engineering Center, funded by the National Science Foundation (DMR 0820404). TCF and LW are supported by the Energy Frontier Research Center ( DE-0001057), DOE.


The American Physical Society (APS) March Meeting 2013 Baltimore 18-22 Mar (2013)

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