WebMigdal’s theorem plays a central role in the physics of electron-phonon interactions in metals and semiconductors, and has been extensively studied theoretically for parabolic band … Arkady Migdal, whose father was a Jewish pharmacist, graduated from secondary school in Petrograd. In 1927 he published his first physics paper. He studied at Leningrad State University but was expelled in 1931 for his "non-proletarian origin". In 1933 he was arrested and imprisoned for 70 days. He graduated from Leningrad State University in 1936 with a Russian Candidate of Sciences degree (Ph.D.). His thesis advisor was Vladimir Fock. Migdal was a postdoc at the Leni…
Finite-lattice Hamiltonian results for the phase structure of the Z (q ...
WebWe obtain basic equations of the superconductivity theory for nonadiabatic systems with the ferromagnetic ordering of the impurity spins and show that the nonadiabaticity alters the superconducting transition temperature T c and the critical impurity concentration. Web10 mrt. 2024 · The results of superconducting density functional theory (SCDFT) and anharmonic calculations, together with anomalously high critical magnetic field, suggest notable departures of the super Conducting properties from the conventional Migdal-Eliashberg and Bardeen-Cooper-Schrieffer theories, and presence of an additional … safari leader crossword clue
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WebA strong spin-orbit interaction and Coulomb repulsion featuring strongly correlated d- and f-electron systems lead to various exotic phase transition including unconventional superconductivity and magnetic multipole order. WebThe Migdal-Eliashberg (ME) theory provides a very successful method for describing conventional supercon- ductors, where the pairing is driven by a phonon-induced … Web1 dec. 2006 · We study the dependence of Tc and of the isotopic coefficient α on the Migdal parameter m = ω0/εF and show that accounting for the overlap of energy bands on the Fermi surface and for the nonadiabaticity effects at small values of the transferred momentum (q ≪ 2pF) allows obtaining high values of Tc even for the weak electron … safari language of origin