| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Degradation Mechanism of the Superconducting Transition Temperature in Nb Thin Films |
| SONG Xiao-Hui1**, JIN Yi-Rong1, FAN Zhen-Jun2, MI Zhen-Yu1, ZHANG Dian-Lin1 |
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2School of Sciences, China University of Geosciences, Beijing 100083
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| Cite this article: |
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SONG Xiao-Hui, JIN Yi-Rong, FAN Zhen-Jun et al 2015 Chin. Phys. Lett. 32 047403 |
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Abstract Systemic measurements show that there is no 3D to 2D crossover in the reduction of the superconducting transition temperature Tc in Nb thin films. This result is consistent with all previous measurements while it is contrary to the prevailing understanding based on the interplay between proximity, localization, and lifetime broadening. Our study indicates that the decrease of Tc can be interpreted by the combined effects of electron-phonon coupling parameter λ and the defect scattering rate ρw, being uniquely determined by their ratio λ/ρw. Other factors such as film thickness and irradiation do not produce additional effects beyond these two parameters.
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Received: 03 September 2014
Published: 30 April 2015
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[1] Wolf S A , Kennedy J J and Nisenoff M J 1976 J. Vac. Sci. Technol. 13 145
[2] Kodama J I, Itoh M and Hirai H J 1983 Appl. Phys. 54 4050
[3] Maekawa S and Fukuyama H 1982 J. Phys. Soc. Jpn. 51 1380
[4] Quateman J H 1986 Phys. Rev. B 34 1948
[5] Testardi L R and Mattheiss L F 1978 Phys. Rev. Lett. 41 1612
[6] Park S I and Geballe T H 1985 Physica B+C 135 108
[7] MacMillan W L 1968 Phys. Rev. 175 537
[8] Kihlstrom K E, Collins D A and Park S I 1989 Phys. Rev. B 39 12257
[9] Jin Y R, Song X H and Zhang D L 2009 Sci. Chin. G: Phys. Mech. Astron. 52 1289
[10] Yoshii K, Yamamoto H, Saiki K and Koma A 1995 Phys. Rev. B 52 13570
[11] Bose S, Banerjee R, Genc A, Raychaudhuri P, Fraserand H L and Ayyub P 2006 J. Phys.: Condens. Matter 18 4553
[12] Mayadas A F, Laibowitz R B and Cuomo J J 1972 J. Appl. Phys. 43 1287
[13] Delacour C, Ortega L, Faucher M, Crozes T, Fournier T, Pannetier B and Bouchiat V 2011 Phys. Rev. B 83 144504
[14] Lemberger T R, Hetel I, Knepper J W and Yang F Y 2007 Phys. Rev. B 76 094515
[15] Gubin A I, Il'in K S, Vitusevich S A, Siegel M and Klein N 2005 Phys. Rev. B 72 064503
[16] Hikita M, Tajima Y, Tamamura T and Kurihara S 1990 Phys. Rev. B 42 118
[17] Nath S K, Dhawan R, Rai S, Lodha G S and Sokhey K J S 2012 Physica C 472 21
[18] Jiang Q D, Xie Y L, Zhang W B, Gut H, Ye Z Y, Wu K, Zhang J L, Li C Y and Yin D L 1990 J. Phys.: Condens. Matter 2 3567
[19] Camerlingo C, Scardi P, Tosello C and Vaglio R 1985 Phys. Rev. B 31 3121
[20] Moehlecke S and Ovadyahu Z 1984 Phys. Rev. B 29 6203
[21] Allen P B 1980 Lecture Notes Phys. 115 388
[22] Belitz D 1987 Phys. Rev. B 36 47
[23] Allen P B 1999 Handbook Superconductivity (New York: Academic)
[24] Belitz D and Kikpatrick T R 1994 Rev. Mod. Phys. 66 261
[25] Andreone A, Cassinese A, Iavarone M, Vaglio R, Kulik I I and Palmieri V 1995 Phys. Rev. B 52 4473
[26] Morohashi S, Taketa N, Tzujimura S, Kawanishi M, Harada K, Maekawa S, Nakayama N and Noguchi T 2001 Jpn. J. Appl. Phys. 40 576 |
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