Chin. Phys. Lett.  2007, Vol. 24 Issue (9): 2624-2627    DOI:
Original Articles |
Superconducting State Parameters of CuCZr100-C Binary Amorphous Alloys by Pseudopotential Approach
Aditya M. Vora
Parmeshwari 165, Vijaynagar Area, Hospital Road, Bhuj-Kutch, 370 001, Gujarat, India
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Aditya M. Vora 2007 Chin. Phys. Lett. 24 2624-2627
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Abstract We present the screening dependence theoretical investigations of the
superconducting state parameters, i.e. electron--phonon coupling strength
α, Coulomb pseudopotential μ*, transition temperature Tc, isotope effect exponent α, and effective interaction strength N0V of some CuCZr100-C (C=25, 30, 33, 35, 40, 45, 50, 55, 57, 60 at.%) binary amorphous alloys by employing the well-known empty core model potential of Ashcroft. Five screening functions proposed by Hartree, Taylor, Ichimaru-Utsumi, Farid et
al. and Sarkar it et al. are used to study the screening influence on the aforesaid superconducting properties. The transition temperature Tc obtained from the Ichimaru-Utsumi screening function is found to be in excellent agreement with available theoretical or experimental data. Also, the present results are found in qualitative agreement with the other earlier reported data, which confirms the superconducting phase in the amorphous alloys.
Keywords: 61.43.Dq      71.15.Dx      74.20.-z      74.70.Ad     
Received: 27 January 2007      Published: 16 August 2007
PACS:  61.43.Dq (Amorphous semiconductors, metals, and alloys)  
  71.15.Dx (Computational methodology (Brillouin zone sampling, iterative diagonalization, pseudopotential construction))  
  74.20.-z (Theories and models of superconducting state)  
  74.70.Ad (Metals; alloys and binary compounds)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2007/V24/I9/02624
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Articles by authors
Aditya M. Vora
[1] Vora A M, Patel M H, Gajjar P N and Jani A R 2002 Pramana J.Phys. 58 849
[2] Gajjar P N, Vora A M, Patel M H and Jani A R 2003 Int. J.Mod. Phys. B 17 6001
[3] Gajjar P N, Vora A M and Jani A R 2004 Indian J. Phys. 78 775 Gajjar P N, Vora A M and Jani A R 2004 Mod. Phys. Lett. B18573
[4] Vora Aditya M 2006 Physica C 450 135 Vora Aditya M 2007 Physica C 458 21 Vora Aditya M 2007 Physica C 458 43
[5] Vora A M 2007 Supercond. Sci. Technol. 20 542
[6] Sharma S, Sharma K S and Khan H 2004 Supercond. Sci. Technol. 17 474Sharma S, Khan H and Sharma K S 2004 Phys. Stat. Sol. B 241 2562
[7] Wang W H, Dong C and Shek C H 2004 Mater Sci. Eng. Rep. 44 45
[8] Tang M B, Zhao D Q, Pan M X and Wang W H 2004 Chin. Phys.Lett. 21 901
[9] Tang M B, Bai H Y, Pan M X, Zhao D Q and Wang W H 2005 J.Non-Cryst. Solids 351 2572
[10] Li Y and Bai H Y 2005 J. Non-Cryst. Solids 351 2378
[11] Ashcroft N W 1966 Phys. Lett. 23 48
[12] Butler W H 1977 Phys. Rev. B 15 5267
[13] Altounian Z and Strom-Olsen J O 1983 Phys. Rev. B 274149
[14] Minnigerode G von and Samwer K 1981 Physica B 108 1217
[15] McMillan W L 1968 Phys. Rev. 167 331
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