Abstract
This paper reports on the results of ab initio spin-polarized GW calculations of quasiparticle properties, such as the spectral weight, the lifetime, the velocity, and the mean free path, for the FeCo ferromagnetic alloy and its components. The contribution of the localized d states to the above characteristics has been analyzed. The spin asymmetry of the properties of quasiparticle excitations, which is responsible for the spin filter effect observed in experiments, has been investigated. The contributions to the mean free path from the electron scattering processes, which are disregarded within the framework of the GW approximation, have been estimated from a comparison with experimental data.
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R. Knorren, K. H. Bennemann, R. Burgermeister, and M. Aeschlimann, Phys. Rev. B: Condens. Matter 61, 9427 (2000).
E. Zarate, P. Apell, and P. M. Echenique, Phys. Rev. B: Condens. Matter 60, 2326 (1999).
V. P. Zhukov, E. V. Chulkov, and P. M. Echenique, Phys. Rev. B: Condens. Matter 73, 125105 (2006).
I. Appelbaum, B. Huang, and D. Monsma, Nature (London) 447, 295 (2007).
I. Žutić, J. Fabian, and S. C. Erwin, J. Phys.: Condens. Matter 19, 165219 (2007).
T. Banerjee, E. Haq, M. H. Siekman, J. C. Lodder, and R. Jansen, Phys. Rev. Lett. 94, 027204 (2005).
S. van Dijken, X. Jiang, and S. S. P. Parkin, Phys. Rev. B: Condens. Matter 66, 094417 (2002).
I. A. Nechaev, V. P. Zhukov, and E. V. Chulkov, Fiz. Tverd. Tela (St. Petersburg) 49(10), 1729 (2007) [Phys. Solid State 49 (10), 1811 (2007)].
G. F. Giuliani and G. Vignale, Quantum Theory of the Electron Liquid (Cambridge University Press, Cambridge, 2005).
P. Eckerlin and H. Kandler, in Numerical Data and Functional Relationships in Science and Technology: Landolt-Börnstein, New Series, Ed. by K.-H. Hellwege and A. M. Hellwege (Springer, Berlin, 1971), Group III, Vol. 6, p. 428.
P. Söderlind, O. Eriksson, B. Johansson, R. C. Albers, and A. M. Boring, Phys. Rev. B: Condens. Matter 45, 12911 (1992).
H. Kino, F. Aryasetiawan, I. Solovyev, T. Miyake, T. Ohno, and K. Terakura, Physica B (Amsterdam) 329–333, 858 (2003).
G. Erenreich and L. Schwartz, The Electronic Structure of Alloys (Academic, New York, 1976; Mir, Moscow, 1979).
I. Turek, J. Kudrnovský, V. Drchal, and P. Weinberger, Phys. Rev. B: Condens. Matter 49, 3352 (1994).
D. J. Singh, Phys. Rev. B: Condens. Matter 45, 2258 (1992).
L. V. Pourovskii, A. V. Ruban, L. Vitos, H. Ebert, B. Johansson, and I. A. Abrikosov, Phys. Rev. B: Condens. Matter 71, 094415 (2005).
A. Y. Liu and D. J. Singh, Phys. Rev. B: Condens. Matter 46, 11 145 (1992).
A. Díaz-Ortiz, R. Drautz, M. Fähnle, H. Dosch, and J. M. Sanchez, Phys. Rev. B: Condens. Matter 73, 224208 (2006).
J. J. Quinn, Phys. Rev. 126, 1453 (1962).
N. E. Zein and V. P. Antropov, Phys. Rev. Lett. 89, 126402 (2002).
I. A. Nechaev, E. V. Chulkov, and P. M. Echenique, Phys. Rev. B: Condens. Matter 76, 245125 (2007).
V. P. Zhukov, E. V. Chulkov, and P. M. Echenique, Phys. Rev. Lett. 93, 096401 (2004).
I. A. Nechaev and E. V. Chulkov, Phys. Rev. B: Condens. Matter 71, 115104 (2005); Phys. Rev. B: Condens. Matter 73, 165112 (2006).
A. Mönnich, J. Lange, M. Bauer, M. Aeschlimann, I. A. Nechaev, V. P. Zhukov, P. M. Echenique, and E. V. Chulkov, Phys. Rev. B: Condens. Matter 74, 035102 (2006).
E. V. Chulkov, A. G. Borisov, J. P. Gauyacq, D. Sanchez-Portal, V. M. Silkin, V. P. Zhukov, and P. M. Echenique, Chem. Rev. 106, 4160 (2006).
I. Yu. Sklyadneva, A. Leonardo, P. M. Echenique, S. V. Eremeev, and E. V. Chulkov, J. Phys.: Condens. Matter 18, 7923 (2006).
L. Kleinman, Phys. Rev. B: Solid State 17, 3666 (1978).
E. Vescovo, C. Carbone, U. Alkemper, O. Rader, T. Kachel, W. Gudat, and W. Eberhardt, Phys. Rev. B: Condens. Matter 52, 13497 (1995).
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Original Russian Text © I.A. Nechaev, E.V. Chulkov, 2009, published in Fizika Tverdogo Tela, 2009, Vol. 51, No. 4, pp. 713–719.
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Nechaev, I.A., Chulkov, E.V. Properties of quasiparticle excitations in FeCo ferromagnetic alloy. Phys. Solid State 51, 754–761 (2009). https://doi.org/10.1134/S1063783409040180
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DOI: https://doi.org/10.1134/S1063783409040180