Scanning tunneling spectroscopy in MgB2.

@article{Karapetrov2001ScanningTS,
  title={Scanning tunneling spectroscopy in MgB2.},
  author={Goran Karapetrov and Maria Luisa Iavarone and W. K. Kwok and George William Crabtree and David G. Hinks},
  journal={Physical review letters},
  year={2001},
  volume={86 19},
  pages={
          4374-7
        }
}
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… CONTINUE READING

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