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- W3098747782 endingPage "035017" @default.
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- W3098747782 abstract "Starting from the shell structure in atoms and the significant correlation within electron pairs, we distinguish the exchange-correlation effects between two electrons of opposite spins occupying the same orbital from the average correlation among many electrons in a crystal. In the periodic potential of the crystal with lattice constant larger than the effective Bohr radius of the valence electrons, these correlated electron pairs can form a metastable energy band above the corresponding single-electron band separated by an energy gap. In order to determine if these metastable electron pairs can be stabilized, we calculate the many-electron exchange-correlation renormalization and the polaron correction to the two-band system with single electrons and electron pairs. We find that the electron-phonon interaction is essential to counterbalance the Coulomb repulsion and to stabilize the electron pairs. The interplay of the electron-electron and electron-phonon interactions, manifested in the exchange-correlation energies, polaron effects, and screening, is responsible for the formation of electron pairs (bipolarons) that are located on the Fermi surface of the single-electron band." @default.
- W3098747782 created "2020-11-23" @default.
- W3098747782 creator A5019520725 @default.
- W3098747782 creator A5023040339 @default.
- W3098747782 creator A5025451816 @default.
- W3098747782 creator A5075212329 @default.
- W3098747782 date "2018-03-08" @default.
- W3098747782 modified "2023-09-26" @default.
- W3098747782 title "Electron pairing: from metastable electron pair to bipolaron" @default.
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- W3098747782 doi "https://doi.org/10.1088/2399-6528/aaaee0" @default.
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