Study of the New Superconducting Compound Zr0.97V0.03B2 with Point-Contact Spectroscopy

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• 作者：Rodolfo E. López-Romero ; R. Escudero
• 关键词：Tunneling and point contact spectroscopies ; New superconductors
• 刊名：Journal of Superconductivity Incorporating Novel Magnetism
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：28
• 期：10
• 页码：2953-2957
• 全文大小：937 KB
• 参考文献：1.Giaever, I.: Phys. Rev. 5, 4 (1960)
  2.Giaever, I., Megerle, K.: Phys. Rev. Lett. 122, 4 (1961)
  3.Wolf, E.L.: Principles of electron tunneling spectroscopy. Oxford University Press, New York (1989)
  4.Sharvin, Yu.V.: Sov, Phys. JETP 21, 655 (1965)ADS
  5.Yanson, I.K.: Sov. JETP, 39 (1974)
  6.Yanson, I.K., Kulik, I.O., Batrak, A.G.: J. Low Temp. Phys. 42, 5 (1981)CrossRef
  7.Yanson, I.K., Shalor, Y.N.: JETP 44, 148 (1976)ADS
  8.Upadhyay, S.K., Palanisami, A., Louie, R.N., Buhrman, R.A.: Phys. Rev. Lett. 81, 15 (1998)CrossRef
  9.Muller, C.J., van Ruitenbeek, J.M., de Jongh, L.J.: Physica C 191, 485 (1992)CrossRef ADS
  10.Escudero, R., Morales, F.: Phys. Rev. 150, 715-19 (1994)
  11.Daghero, D., Gonnelli, R. S.: arXiv:0912.-858v1 (2009)
  12.Duif, A.M., Jansen, A.G.M., Wilder, P.: J. Phys. Condens. Matter. 1, 3157-189 (1989)CrossRef ADS
  13.Jansen, A.G.M., van Gelder, A.P., Wyder, P.: J. Phys. C Solid St. Phys. 13, 6073-18 (1980)CrossRef ADS
  14.Wexler, G.: Proc. Phys. Soc. London 89, 927-41 (1966)CrossRef ADS
  15.Blonder, G.E., Tinkham, M., Klapwijk, T.M.: Phys. Rev. B 25, 7 (1982)CrossRef
  16.Strijkers, G.J., Ji, Y., Yang, F.Y., Chien, C.L.: Phys. Rev, B 63, 104510 (2001)CrossRef ADS
  17.Michael Tinkham: Introduction to superconductivity, 2nd edn. McGraw Hill Inc (1996)
  18.Orlando, T.P., Delin, K.A.: Foundations of applied superconductivity. Addison- Wesley Publishing Company (1990)
  19.Kedves, F.J., Meszaros, S., Vad, K., Halasz, G., Keszei, B., Mihaly, L.: Solid State Commun. 63, 991-92 (1987)CrossRef ADS
  20.Serway, R.A., Beichner, R.J.: Physics for scientists and engineers with modern physics, 9th edn. Thomson (2013)
  21.Yanson, I.K., Naidyuk, YU. G., Kvitnitskaya, O.E., Fisun, V.V., Bobrov, N.L., Chubov, P.N., Ryabovol, V.V., Behr, G., Kang, W.N., Choi, E.-M., Kim, H.-J., Lee, S.-I., Aizawa, T., Otani, S., Drechsler, S.-L.: Modern Phys. Lett. B 17, 10 (2003)CrossRef
  22.Gasparov, V.A., Sidorov, N.S., Zverkova, I.I., Kulakov, M.P.: Jetp Lett. 73, 10 (2001)CrossRef
  23.Gasparov, V.A.: Jept Lett. 80, 5 (2004)
  24.Jung, S.-G.: J. Appl. Phys. 114, 133905 (2013)CrossRef ADS
  25.Renosto, S.T.: Phys. Rev. B 87, 174502 (2013)CrossRef ADS
  26.Wang, J., Shi, Z.X., Lv, H., Tamegai, T.: Physica C 445-48, 462-65 (2006)CrossRef
  27.Nikoli?, B., Allen, P.B.: arXiv:cond-mat/-811296v1 (1998)
  28.Escudero, R., Morales, F.: Phys. Rev. B 49, 21 (1994)CrossRef
  29.Sinchenko, A.A.: Phys. Rev. B 70, 7 (1999)
  30.Yanson, I.K., et al.: Mod. Phys. Lett. B 17(10), 11,12 (2003)
  31.Adler, J.G., Jackson, J.E.: Rev. Sci. Instrum. 37, 1049 (1966)CrossRef ADS
  32.Janson, L et al.: arXiv:1110.-254v1 [physics.ed-ph] (2011)
  33.Srikanth, H., Raychaudhuri, A.K.: Phys. C Supercond. 190, 229-33 (1992)CrossRef ADS
  34.Park, W.K, Greene, L.H.: J. Phys. Condens. Matter 21, 10 (2009)CrossRef
  35.Sheet, G., Mukhopadhyay, S., Raychaudhuri, P.: Phys. Rev. B 69, 134507 (2004)CrossRef ADS
  36.de Gennes, P.G.: Boundary Effects in Superconductors. Rev. Mod. Phys. 36, 1 (1964)CrossRef
  37.Múller, P., Ustinov, A.V., Schmidt, V.V.: The physics of superconductors: introduction to fundamentals and applications. Springer, Berlin (1997)
  38.Shan, L., et al.: Phys. Rev. B 68, 144510 (2003)CrossRef ADS
  39.DeWilde, Y., et al.: Phys. Rev. Lett. 80, 1 (1998)CrossRef
  40.Rourke, P.M.C., et al.: Phys. Rev. Lett. PRL 94, 107005 (2005)CrossRef ADS
  41.Bashlakov, D.L., et al.: Supercond. Sci. Technol. 18, 1094-099 (2005)CrossRef ADS
  42.Hohn, N., et al.: Z. Phys. B Condens. Matter 69, 173-78 (1987)CrossRef ADS
  43.Yanson, I.K., Bobrov, N.L., Tomy, C.V., Paul, D.McK.: Physica C 334, 33-3 (2000)CrossRef ADS
  
• 作者单位：Rodolfo E. López-Romero (1)
  R. Escudero (1)
  
  1. Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, A. Postal 70-360, México, D.F. 04510, Mexico
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Superconductivity, Superfluidity and Quantum Fluids
  Magnetism and Magnetic Materials
  Condensed Matter
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1557-1947

文摘

We present a study of the superconducting energy gap performed with point contact spectroscopy in a single crystal of the superconductor Zr_0.97V_0.03B₂. We determined the size and evolution with temperature of the energy gap, the transition temperature in the compound occurs at the onset of T ?9.3 K. The point contact junctions were measured from 1.7 to 20 K. The differential conductance as a function of bias voltage was analyzed with the Blonder-Tinkham-Klapwijk model, the evolution of the gap with temperature was compared with the BCS theory, the ratio 2 Δ(0)/K _B T _C was of the order of 8.95 indicative of a very strong coupling limit. Keywords Tunneling and point contact spectroscopies New superconductors