STM study of multiband superconductivity in NbSe2 using a superconducting tip

Details STM study of multiband superconductivity in NbSe2 using a superconducting tip STM study of multiband superconductivity in NbSe2 using a superconducting tip

2004-04-27

arxiv.org/abs/cond-mat/0404638v1

Physica C 404, 306-310, 2004

Physics

Condensed Matter

Superconductivity

5 pages, 5 figures, PDF file

Scientific paper

10.1016/j.physc.2003.10.030

We present a method to produce superconducting tips to be used in Scanning Tunneling Microscopy/Spectroscopy experiments. We use these tips to investigate the evolution of the electronic density of states of NbSe2 from 0.3K up to its critical temperature (7.2K). The use of a superconducting tip (Pb) as ounterelectrode provides an enhancement of the different features related to the DOS of NbSe2 in the tunneling conductance curves, along all the studied thermal range. The analysis of the experimental results gives evidence of the presence of multiband superconductivity in NbSe2.

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