PMID: 11328178May 1, 2001Paper

Scanning tunneling spectroscopy in MgB2

Physical Review Letters
G KarapetrovD G Hinks

Abstract

We present scanning tunneling microscopy measurements of the surface of superconducting MgB2 with a critical temperature of 39 K. In zero magnetic field the conductance spectra can be analyzed in terms of the standard BCS theory with a smearing parameter gamma. The value of the superconducting gap is 5 meV at 4.2 K, with no experimentally significant variation across the surface of the sample. The temperature dependence of the gap follows the BCS form, fully consistent with phonon-mediated superconductivity in this novel superconductor. The application of a magnetic field induces strong pair breaking as seen in the conductance spectra in fields up to 6 T.

References

Oct 2, 1995·Physical Review Letters·I Maggio-AprileO Fischer
Mar 10, 2001·Nature·J NagamatsuJ Akimitsu
Apr 6, 2001·Physical Review Letters·D K FinnemoreP C Canfield
Apr 6, 2001·Physical Review Letters·P C CanfieldC Petrovic
Apr 6, 2001·Physical Review Letters·S L Bud'koP C Canfield

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Citations

Aug 16, 2002·Nature·Hyoung Joon ChoiSteven G Louie
May 2, 2003·Nature·S SoumaK Kadowaki
Feb 28, 2002·Physical Review Letters·B RenkerT Wolf
Apr 17, 2002·Physical Review Letters·H UchiyamaS Tajima
Jul 20, 2001·Physical Review Letters·R OsbornD G Hinks
Sep 5, 2001·Physical Review Letters·R S GonnelliG Ripamonti
Sep 5, 2001·Physical Review Letters·A V ProninS I Krasnosvobodtsev
Jul 20, 2001·Physical Review Letters·F BouquetJ D Jorgensen
Aug 23, 2002·Physical Review Letters·A PerucchiJ Karpinski
Jun 21, 2001·Physical Review Letters·K P BohnenB Renker
Oct 26, 2002·Physical Review Letters·M IavaroneS I Lee
Oct 3, 2001·Physical Review Letters·P SzabóA G Jansen
Nov 3, 2001·Physical Review Letters·F GiubileoP Monod
Feb 7, 2003·Physical Review Letters·A Gurevich, V M Vinokur
Aug 14, 2009·The Journal of Physical Chemistry. B·David A AnderssonSteven D Conradson

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