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Petrović AP, Lortz R, Santi G, et al. Multiband superconductivity in the Chevrel phases SnMo6S8 and PbMo6S8. Phys Rev Lett. 2011;106(1):017003doi: 10.1103/PhysRevLett.106.017003.
Petrović, A. P., Lortz, R., Santi, G., Berthod, C., Dubois, C., Decroux, M., Demuer, A., Antunes, A. B., Paré, A., Salloum, D., Gougeon, P., Potel, M., & Fischer, O. (2011). Multiband superconductivity in the Chevrel phases SnMo6S8 and PbMo6S8. Physical review letters, 106(1), 017003. https://doi.org/10.1103/PhysRevLett.106.017003
Petrović, A P, et al. "Multiband superconductivity in the Chevrel phases SnMo6S8 and PbMo6S8." Physical review letters vol. 106,1 (2011): 017003. doi: https://doi.org/10.1103/PhysRevLett.106.017003
Petrović AP, Lortz R, Santi G, Berthod C, Dubois C, Decroux M, Demuer A, Antunes AB, Paré A, Salloum D, Gougeon P, Potel M, Fischer O. Multiband superconductivity in the Chevrel phases SnMo6S8 and PbMo6S8. Phys Rev Lett. 2011 Jan 07;106(1):017003. doi: 10.1103/PhysRevLett.106.017003. Epub 2011 Jan 06. PMID: 21231768.
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Phys Rev Lett. 2011 Jan 07;106(1):017003. doi: 10.1103/PhysRevLett.106.017003. Epub 2011 Jan 06.

Multiband superconductivity in the Chevrel phases SnMo6S8 and PbMo6S8.

Physical review letters

A P Petrović, R Lortz, G Santi, C Berthod, C Dubois, M Decroux, A Demuer, A B Antunes, A Paré, D Salloum, P Gougeon, M Potel, O Fischer

Affiliations

  1. DPMC-MaNEP, Université de Genève, Quai Ernest-Ansermet 24, 1211 Genève 4, Switzerland.

PMID: 21231768 DOI: 10.1103/PhysRevLett.106.017003

Abstract

Sub-Kelvin scanning tunneling spectroscopy in the Chevrel phases SnMo6S8 and PbMo6S8 reveals two distinct superconducting gaps with Δ1=3 meV, Δ2∼1.0 meV and Δ1=3.1 meV, Δ2∼1.4 meV, respectively. The gap distribution is strongly anisotropic, with Δ2 predominantly seen when scanning across unit-cell steps on the (001) sample surface. The spectra are well fitted by an anisotropic two-band BCS s-wave gap function. Our spectroscopic data are confirmed by electronic heat capacity measurements, which also provide evidence for a twin-gap scenario.

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