Superconducting state parameters of La100-C GaC binary metallic glasses

• Autorzy: Aditya Vora
• Języki publikacji: EN

Abstrakty

EN

The theoretical investigations of the superconducting state parameters (SSP) viz. electron-phonon coupling strength λ, Coulomb pseudopotential μ*, transition temperature T C, isotope effect exponent α and effective interaction strength N O V of six binary La100-C GaC (C = 16, 20, 22, 24, 26 and 28 at. %) metallic glasses have been reported using Ashcroft’s empty core (EMC) model potential for the first time. Five local field correction functions proposed by Hartree (H), Taylor (T), Ichimaru-Utsumi (IU), Farid et al. (F) and Sarkar et al. (S) are used in the present investigation to study the screening influence on the aforesaid properties. It is observed that the electron-phonon coupling strength λ and the transition temperature T C are quite sensitive to the selection of the local field correction functions, whereas the Coulomb pseudopotential μ*, isotope effect exponent α and effective interaction strength N O V show weak dependences on the local field correction functions. The T C obtained from H-local field correction function are found in qualitative agreement with available experimental data and show almost linear nature with the concentration (C) of ‘Ga’ element. A linear T C equation is proposed by fitting the present outcomes for H-local field correction function, which is in conformity with other results for the experimental data. Also, the present results are found to be in qualitative agreement with other such earlier reported data, which confirms the superconducting phase in the metallic glasses.

Słowa kluczowe

EN

seudopotential; superconducting state parameters; binary metallic glasses

• Czasopismo: Open Physics
• Rocznik: 2008
• Tom: 6
• Numer: 2
• Strony: 253-262

Daty

wydano

2008-06-01

online

2008-03-26

Twórcy

autor

Aditya Vora,

Bibliografia

• [1] P.B. Allen, In: C.P. Poole Jr. (Ed.), Handbook of Superconductivity (Academic Press, New York, 1999) 478
• [2] A.V. Narlikar, S.N. Ekbote, Superconductivity and Superconducting Materials (South Asian Publishers New Delhi - Madras, 1983)
• [3] A.M. Vora, M.H. Patel, P.N. Gajjar, A.R. Jani, Pramana-J. Phys. 58, 849 (2002) http://dx.doi.org/10.1007/s12043-002-0181-6[Crossref]
• [4] P.N. Gajjar, A.M. Vora, M.H. Patel, A.R. Jani, Int. J. Mod. Phys. B 17, 6001 (2003) http://dx.doi.org/10.1142/S0217979203023598[Crossref]
• [5] P.N. Gajjar, A.M. Vora, A.R. Jani, Indian J. Phys. 78, 775 (2004)
• [6] A.M. Vora, M.H. Patel, S.R. Mishra, P.N. Gajjar, A.R. Jani, Solid State Phys. 44, 345 (2001)
• [7] P.N. Gajjar, A.M. Vora, A.R. Jani, Mod. Phys. Lett. B 18, 573 (2004) http://dx.doi.org/10.1142/S0217984904007104[Crossref]
• [8] A.M. Vora, Physica C450, 135 (2006)
• [9] A.M. Vora, Physica C458, 21 (2007)
• [10] A.M. Vora, Physica C458, 43 (2007)
• [11] A.M. Vora, Comp. Mater. Sci. 40, 492 (2007) http://dx.doi.org/10.1016/j.commatsci.2007.02.007[Crossref]
• [12] A.M. Vora, Chinese Phys. Lett. 24, 2624 (2007) http://dx.doi.org/10.1088/0256-307X/24/9/045[Crossref]
• [13] A.M. Vora, Cent. Eur. J. Phys. 6, 238 (2008) http://dx.doi.org/10.2478/s11534-008-0059-4[Crossref]
• [14] A.M. Vora, Cent. Eur. J. Phys. 6, 263 (2008) http://dx.doi.org/10.2478/s11534-008-0023-3[Crossref]
• [15] A.M. Vora, J. Supercond. Novel Magn. 20, 355 (2007) http://dx.doi.org/10.1007/s10948-007-0230-y[Crossref]
• [16] A.M. Vora, J. Supercond. Novel Magn. 20, 373 (2007) http://dx.doi.org/10.1007/s10948-007-0232-9[Crossref]
• [17] A.M. Vora, J. Supercond. Novel Magn. 20, 387 (2007) http://dx.doi.org/10.1007/s10948-007-0234-7[Crossref]
• [18] A.M. Vora, Phys. Scr. 76, 204 (2007) http://dx.doi.org/10.1088/0031-8949/76/2/013[Crossref]
• [19] A.M. Vora, J. Optoelec. Adv. Mater. 9, 2498 (2007)
• [20] S. Sharma, K S. Sharma, H. Khan, Czech J. Phys. 55, 1005 (2005) http://dx.doi.org/10.1007/s10582-005-0099-6[Crossref]
• [21] S. Sharma, K.S. Sharma, H. Khan, Supercond. Sci. Technol. 17, 474 (2004) http://dx.doi.org/10.1088/0953-2048/17/3/029[Crossref]
• [22] S. Sharma, H. Khan, K.S. Sharma, Phys. Status Solidi B 241, 2562 (2004) http://dx.doi.org/10.1002/pssb.200402039[Crossref]
• [23] S. Sharma, H. Khan, Solid State Phys. 46, 635 (2003)
• [24] S. Sharma, H. Khan, K.S. Sharma, Ind. J. Pure Appl. Phys. 41, 301 (2003)
• [25] M. Gupta, P.C. Agarwal, K.S. Sharma, L. Dass, Phys. Status Solidi B 211, 731 (1999) http://dx.doi.org/10.1002/(SICI)1521-3951(199902)211:2<731::AID-PSSB731>3.0.CO;2-Y[Crossref]
• [26] K.S. Sharma, R. Sharma, M. Gupta, P.C. Agarwal, L. Dass, In: M.P. Saksena et al. (Eds.), The Physics of Disordered Materials (NISCOM, New Delhi, 1997) 95
• [27] P.C. Agarwal, M. Gupta, K.S. Sharma, L. Dass, In: M.P. Saksena et al. (Eds.), The Physics of Disordered Materials (NISCOM, New Delhi, 1997) 102
• [28] M. Gupta, K.S. Sharma, L. Dass, Pramana-J. Phys. 48, 923 (1997) http://dx.doi.org/10.1007/BF02845595[Crossref]
• [29] R. Sharma, K.S. Sharma, Supercond. Sci. Technol. 10, 557 (1997) http://dx.doi.org/10.1088/0953-2048/10/8/005[Crossref]
• [30] N.W. Ashcroft, Phys. Lett. 23, 48 (1966) http://dx.doi.org/10.1016/0031-9163(66)90251-4[Crossref]
• [31] K.S. Sharma, C.M. Kachhava, Solid State Commun. 30, 749 (1979) http://dx.doi.org/10.1016/0038-1098(79)91174-8[Crossref]
• [32] V. Veljkovic, I. Slavic, Phys. Rev. Lett. 29, 105 (1972) http://dx.doi.org/10.1103/PhysRevLett.29.105[Crossref]
• [33] W.A. Harrison, Elementary Electronic Structure, (World Scientific, Singapore, 1999)
• [34] R. Taylor, J. Phys. F Met. Phys. 8, 1699 (1978) http://dx.doi.org/10.1088/0305-4608/8/8/011[Crossref]
• [35] S. Ichimaru, K. Utsumi, Phys. Rev. B 24, 7386 (1981) http://dx.doi.org/10.1103/PhysRevB.24.7385[Crossref]
• [36] B. Farid, V. Heine, G. Engel, I. J. Robertson, Phys. Rev. B 48, 11602 (1993)
• [37] A. Sarkar, D. Sen, H. Haldar, D. Roy, Mod. Phys. Lett. B 12, 639 (1998) http://dx.doi.org/10.1142/S0217984998000755[Crossref]
• [38] U. Mizutani, Prog. Mater. Sci. 28, 97 (1983) http://dx.doi.org/10.1016/0079-6425(83)90001-4[Crossref]
• [39] W.L. McMillan, Phys. Rev. 167, 313 (1968) http://dx.doi.org/10.1103/PhysRev.167.331[Crossref]
• [40] B.T. Matthias, In: C.J. Gorter (Ed.), Progress in Low Temperature Physics, Vol. 2 (North Holland, Amsterdam, 1957)
• [41] B.T. Matthias, Physica 69, 54 (1973) http://dx.doi.org/10.1016/0031-8914(73)90199-7[Crossref]

Identyfikatory

DOI

10.2478/s11534-008-0055-8