corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 86 » Issue 24
< Previous Article | Next Article >

Phys. Rev. Lett. 86, 5582–5584 (2001)

Tunneling Spectroscopy in Small Grains of Superconducting MgB2

Download: PDF (166 kB) Buy this article Export: BibTeX or EndNote (RIS)

G. Rubio-Bollinger1, H. Suderow2, and S. Vieira1,*
1Laboratorio de Bajas Temperaturas, Departamento Física de la Materia Condensada C-III, Instituto Universitario de Ciencia de Materiales “Nicolás Cabrera,” Universidad Autónoma de Madrid, E-28049 Madrid, Spain
2Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Campus de Cantoblanco, E-28049 Madrid, Spain

Received 13 February 2001; published in the issue dated 11 June 2001

We report on tunneling spectroscopy experiments in small grains of the new binary intermetallic superconductor MgB2. Experiments have been performed at 2.5 K using a low temperature scanning tunneling microscope. Good fit to the BCS model is obtained, with a gap value of 2 meV. In the framework of this model, this value should correspond to a surface critical temperature of 13.2 K. No evidence of gap anisotropy has been found.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.5582
DOI:
10.1103/PhysRevLett.86.5582
PACS:
74.50.+r, 68.37.Ef

*Unidad asociada al ICMM.

 
< Previous Article | Next Article >