Superconductivity in MgB2: Clean or Dirty?

I.I. Mazin, O.K. Andersen, O. Jepsen, O.V. Dolgov, J. Kortus, Alexandre Avraamovitch Golubov, A.B. Kuz'menko, D. van der Marel

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Abstract

A large number of experimental facts and theoretical arguments favor a two-gap model for superconductivity in MgB2. However, this model predicts strong suppression of the critical temperature by interband impurity scattering and, presumably, a strong correlation between the critical temperature and the residual resistivity. No such correlation has been observed. We argue that this fact can be understood if the band disparity of the electronic structure is taken into account, not only in the superconducting state, but also in normal transport.
Original languageUndefined
Pages (from-to)107002/1-107002/4
Number of pages4
JournalPhysical review letters
Volume89
Issue number10
DOIs
Publication statusPublished - 2002

Keywords

  • IR-43537
  • METIS-206831

Cite this

Mazin, I. I., Andersen, O. K., Jepsen, O., Dolgov, O. V., Kortus, J., Golubov, A. A., ... van der Marel, D. (2002). Superconductivity in MgB2: Clean or Dirty? Physical review letters, 89(10), 107002/1-107002/4. https://doi.org/10.1103/PhysRevLett.89.107002
Mazin, I.I. ; Andersen, O.K. ; Jepsen, O. ; Dolgov, O.V. ; Kortus, J. ; Golubov, Alexandre Avraamovitch ; Kuz'menko, A.B. ; van der Marel, D. / Superconductivity in MgB2: Clean or Dirty?. In: Physical review letters. 2002 ; Vol. 89, No. 10. pp. 107002/1-107002/4.
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Mazin, II, Andersen, OK, Jepsen, O, Dolgov, OV, Kortus, J, Golubov, AA, Kuz'menko, AB & van der Marel, D 2002, 'Superconductivity in MgB2: Clean or Dirty?' Physical review letters, vol. 89, no. 10, pp. 107002/1-107002/4. https://doi.org/10.1103/PhysRevLett.89.107002

Superconductivity in MgB2: Clean or Dirty? / Mazin, I.I.; Andersen, O.K.; Jepsen, O.; Dolgov, O.V.; Kortus, J.; Golubov, Alexandre Avraamovitch; Kuz'menko, A.B.; van der Marel, D.

In: Physical review letters, Vol. 89, No. 10, 2002, p. 107002/1-107002/4.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Superconductivity in MgB2: Clean or Dirty?

AU - Mazin, I.I.

AU - Andersen, O.K.

AU - Jepsen, O.

AU - Dolgov, O.V.

AU - Kortus, J.

AU - Golubov, Alexandre Avraamovitch

AU - Kuz'menko, A.B.

AU - van der Marel, D.

PY - 2002

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N2 - A large number of experimental facts and theoretical arguments favor a two-gap model for superconductivity in MgB2. However, this model predicts strong suppression of the critical temperature by interband impurity scattering and, presumably, a strong correlation between the critical temperature and the residual resistivity. No such correlation has been observed. We argue that this fact can be understood if the band disparity of the electronic structure is taken into account, not only in the superconducting state, but also in normal transport.

AB - A large number of experimental facts and theoretical arguments favor a two-gap model for superconductivity in MgB2. However, this model predicts strong suppression of the critical temperature by interband impurity scattering and, presumably, a strong correlation between the critical temperature and the residual resistivity. No such correlation has been observed. We argue that this fact can be understood if the band disparity of the electronic structure is taken into account, not only in the superconducting state, but also in normal transport.

KW - IR-43537

KW - METIS-206831

U2 - 10.1103/PhysRevLett.89.107002

DO - 10.1103/PhysRevLett.89.107002

M3 - Article

VL - 89

SP - 107002/1-107002/4

JO - Physical review letters

JF - Physical review letters

SN - 0031-9007

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Mazin II, Andersen OK, Jepsen O, Dolgov OV, Kortus J, Golubov AA et al. Superconductivity in MgB2: Clean or Dirty? Physical review letters. 2002;89(10):107002/1-107002/4. https://doi.org/10.1103/PhysRevLett.89.107002