Abstract
We consider the electron-phonon interaction in the framework of dynamic spin-fluctuation theory and obtain an expression for the self-energy part that depends explicitly on the spin fluctuations and lattice vibrations. We illustrate the theoretical results with the example of iron. We show that the effect of phonons on temperature dependence of the magnetic characteristics of metals is appreciable but not as large as in the static single-site approximation of the spin-fluctuation theory and spin dynamics using classical Hamiltonians.
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The authors are grateful to the referee for the useful comments.
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This research was performed within the state assignment of the Ministry of Science and Education of Russia (Theme “Electron” No. AAAA-A18-118020190098-5) and was supported in part by a program of the Ural Branch of Russian Academy of Sciences (Project No. 18-2-2-11).
Prepared from an English manuscript submitted by the authors; for the Russian version, see Teoreticheskaya i Matematicheskaya Fizika, Vol. 201, No. 1, pp. 137–148, October, 2019.
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Melnikov, N.B., Paradezhenko, G.V. & Reser, B.I. Effect of Phonons on the Magnetic Characteristics of Metals at Finite Temperatures. Theor Math Phys 201, 1531–1540 (2019). https://doi.org/10.1134/S0040577919100106
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DOI: https://doi.org/10.1134/S0040577919100106