Itinerant Superconductivity

Mizia, Jerzy; Górski, Grzegorz

doi:10.1016/b978-008044647-9/50010-x

Cited by 1 publication

(3 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We can take those models, turn them around, and most likely we would obtain a better idea on the form and structure of real objects, than directly from the objects themselves". 93 The development of the physics of magnetic phenomena 157,219,220 proves most convincingly the validity of Peierls' conclusion.…”

Section: The Adequacy Of the Model Descriptionmentioning

confidence: 74%

“…[148][149][150][151][152] However, the role played by the inter-electron interaction remained unclear within the conventional approach. On the other hand, the development of the band theory of magnetism, 62,[153][154][155][156][157] and investigations of the electronic phase's transitions in transition and rare-earth metal compounds gradually led to realization of the determining role of electron correlations. [158][159][160] Moreover, in many cases inter-electron interaction is very strong and the description in terms of the conventional band theory is no longer applicable.…”

Section: The Problem Of Magnetism Of Itinerant Electronsmentioning

confidence: 99%

“…The off-diagonal terms select the vacuum state of the band's antiferromagnet in the form of a spindensity wave. It is necessary to stress that the problem of the band's antiferromagnetism 157,337 is quite involved, and the construction of a consistent microscopic theory of this phenomenon remains a topical problem.…”

Section: Broken Symmetry Quasiaverages and Physics Of Magnetic Materialsmentioning

confidence: 99%

See 2 more Smart Citations

Statistical Mechanics and the Physics of Many-Particle Model Systems

Kuzemsky

2016

124

View full text Add to dashboard Cite

The development of methods of quantum statistical mechanics is considered in light of their applications to quantum solid-state theory. We discuss fundamental problems of the physics of magnetic materials and the methods of the quantum theory of magnetism, including the method of two-time temperature Green's functions, which is widely used in various physical problems of many-particle systems with interaction. Quantum cooperative effects and quasiparticle dynamics in the basic microscopic models of quantum theory of magnetism: the Heisenberg model, the Hubbard model, the Anderson Model, and the spin-fermion model are considered in the framework of novel self-consistent-field approximation. We present a comparative analysis of these models; in particular, we compare their applicability for description of complex magnetic materials. The concepts of broken symmetry, quantum protectorate, and quasiaverages are analyzed in the context of quantum theory of magnetism and theory of superconductivity. The notion of broken symmetry is presented within the nonequilibrium statistical operator approach developed by D.N. Zubarev. In the framework of the latter approach we discuss the derivation of kinetic equations for a system in a thermal bath. Finally, the results of investigation of the dynamic behavior of a particle in an environment, taking into account dissipative effects, are presented.

show abstract

Section: The Adequacy Of the Model Descriptionmentioning

confidence: 74%