Electron - positron correlation energy due to screening in metals
نویسندگان
چکیده
منابع مشابه
Distinguishing attosecond electron-electron scattering and screening in transition metals.
Electron-electron interactions are the fastest processes in materials, occurring on femtosecond to attosecond timescales, depending on the electronic band structure of the material and the excitation energy. Such interactions can play a dominant role in light-induced processes such as nano-enhanced plasmonics and catalysis, light harvesting, or phase transitions. However, to date it has not bee...
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The electron–positron interaction greatly complicates the interpretation of positron annihilation data. The two-detector Doppler measurements of Mijnarends et al. as well as our theoretical calculations point at the conclusion that the local density approximation to e+−e− interaction is a good way of treating this problem in real metals, at least the simplest ones. This shows that e+−e− interac...
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We study how a finite hybridization between a narrow correlated band and a wide conduction band affects the Mott transition. At zero temperature, the hybridization is found to be a relevant perturbation, so that the Mott transition is suppressed by Kondo screening. In contrast, a first-order transition remains at finite temperature, separating a local-moment phase and a Kondo-screened phase. Th...
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A method for calculating the phonon self-energy in metals arising from the coupling between phonons and electrons near the Fermi surface is developed. The essence of this scheme is the separation of the inter- and intraband parts of the electron polarizability. The intraband contribution provides extra screenings and is closely related to the electron-phonon coupling and phonon softening in met...
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ژورنال
عنوان ژورنال: Global Journal of Pure and Applied Sciences
سال: 2002
ISSN: 1118-0579
DOI: 10.4314/gjpas.v8i1.16343