Abstract
We present the results of investigations of the temperature dependences of complex conductivity σ(T) = σ ′(T)−i σ ″(T) at frequency 9.4 GHz in series of single crystals V3+x Si1−x with different Si content. The data exhibit peculiarities typical for multiband superconductors, namely a nonlinear temperature dependence of resistivity above superconducting transition temperature T c , suppression of superconducting transition temperature T c by nonmagnetic impurities, a positive curvature of σ ″(T) curves close to T c , and a coherence peak in σ ′(T) at T∼T c /2. Using a two-band model in the weak-coupling regime, we demonstrate that the behavior of T c and the evolution of σ(T) with Si-content variation are consistently described by changing of the interband scattering rate.
Similar content being viewed by others
References
Moskalenko, V.A.: Fiz. Met.Metalloved 8 (4), 503 (1959)
Moskalenko, V.A.: Phys. Met. Metallogr. 8 (4), 25 (1959)
Suhl, H., Matthias, B.T., Walker, L.R.: Phys. Rev. Lett 3, 552 (1959)
Bardeen, J., Cooper, L.N., Schrieffer, J.R.: Phys. Rev 108, 1175 (1957)
Shen, L.Y.L., Senozan, N.M., Phillips, N.E.: Phys. Rev. Lett. 14, 1025 (1965)
Radebaugh, R., Keesom, P.H.: Phys. Rev. 149, 209 (1966)
Hafstrom, J.W., MacVicar, M.L.A.: Phys. Rev. B 2, 4511 (1970)
Binning, G., Baratoff, A., Hoenig, H.E., Bednorz, J.G.: Phys. Rev. Lett 45, 1352 (1980)
Shulga, S.V., Drechsler, S.-L., Fuchs, G., Müller, K.-H., Krug, K.: Phys. Rev. Lett 80, 1730 (1998)
Boaknin, E., Tanatar, M.A., Paglione, J., Hawthorn, D., Ronning, F., Hill, R.W., Sutherland, M., Taillefer, L., Sonier, J., Hayden, S.M., Brill, J.M.: Phys. Rev. Lett. 90, 117003 (2003)
Wälte, A., Fuchs, G., Müller, K.-H., Handstein, A., Rosner, H.: Phys. Rev. B 70, 174503 (2004)
Tanatar, M.A., Paglione, J., Nakatsuji, S., Hawthorn, D.G., Canfield, P.C., Fisk, Z.: Phys. Rev. Lett. 95, 067002 (2005)
Bauer, E., Hilscher, G., Michor, H., Paul, Ch., Sigrist, M., Rogl, P.: Phys. Rev. Lett. 92, 027003 (2004)
Guritanu, V., Goldacker, W., Bouquet, F., et al.: Phys. Rev. B 70, 184526 (2004)
Hirschfeld, P.J., Korshunov, M.M., Mazin, I.I.: Rep. Prog. Phys. 74, 124508 (2011)
Zehetmayer, M.: Supercond. Sci. Technol. 26, 043001 (2013)
Nefyodov, Y.A., Shuvaev, A.M., Trunin, M.R.: Europhys. Lett. 72, 638 (2005)
Kogan, V.G., Martin, C., Prozorov, R.: Phys. Rev. B 80, 014507 (2009)
Perucchi, A., Nicoletti, D., Ortolani, M., et al.: Phys. Rev. B 81, 092509 (2010)
Sonier, J.E., Callaghan, F.D., Miller, R.I., et al.: Phys. Rev. Lett. 93, 017002 (2004)
Zehetmayer, M., Hecher, J.: Supercond. Sci. Technol. 27, 044006 (2014)
Nam, S.B.: Phys. Rev 156, 470 (1967)
Golubov, A.A., Mazin, I.I.: Phys. Rev. B 55, 015146 (1997)
Golubov, A.A., Brinkman, A., Dolgov, O.V., et al.: Phys. Rev. B 66, 054254 (2002)
Nicole, E.J., Carbotte, J.P.: Phys. Rev. B 71, 054501 (2005)
Trunin, M.R.: J. Superconductivity 11, 381 (1998)
Golubov, A.A, Dolgov, O.V., Boris, A.V., et al.: JETP Lett 94, 333 (2011)
Acknowledgments
We would like to thank V.A. Marchenko for producing V3+x Si1−x crystals. Helpful discussions with I.I. Mazin are gratefully acknowledged. This work was supported by megagrant no.14Y26.31.0007 funded by Russian Ministry of Education and Science and in part by RFBR grant no.12-02-01009 and Dutch FOM.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Dolgov, O.V., Golubov, A.A., Nefyodov, Y.A. et al. Microwave Conductivity in Two-Band Superconductors V\(_{\mathbf {3 + x}}\mathop {\mathbf Si}_{\mathbf {1 - x}}\) . J Supercond Nov Magn 28, 331–337 (2015). https://doi.org/10.1007/s10948-014-2700-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10948-014-2700-3