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77 papers · 1 filter
Extending the Feynman variational principle and analytical methods to lattice polarons
S. N. Klimin, J. Tempere, M. Houtput +6
We develop and compare several analytical approximations for the ground state and zero-temperature polaron dispersion in finite-width, nonparabolic conduction bands. The main focus…
Beyond Random Phase Approximation in electron-hole bilayer superfluidity
Filippo Pascucci, Stefania De Palo, Sara Conti +3
We derive the normal and anomalous proper polarization functions and the screened Coulomb interactions in a two-dimensional superfluid electron-hole bilayer, including all first-or…
Pattern Formation by Electric-field Quench in Mott Crystal
Nicolas Gauquelin, Filomena Forte, Daen Jannis +10
The control of Mott phase is intertwined with the spatial reorganization of the electronic states. Out-of-equilibrium driving forces typically lead to electronic patterns that are…
Charge localization, frustration relief, and spin-orbit coupling in UO
Rolando Saniz, Gianguido Baldinozzi, Ine Arts +3
Research efforts on the low temperature magnetic order and electronic properties of UO have been inconclusive so far. Reinterpreting neutron scattering results, we use grou…
Polaron with Quadratic Electron-phonon Interaction
Stefano Ragni, Thomas Hahn, Zhongjin Zhang +9
We present the first numerically exact study of a polaron with quadratic coupling to the oscillator displacement, using two alternative methodological developments. Our results cov…
Direct observation of two-dimensional small polarons at correlated oxide interface
Chi Sin Tang, Shengwei Zeng, Jing Wu +14
Two-dimensional (2D) perovskite oxide interfaces are ideal systems where diverse emergent properties can be uncovered.The formation and modification of polaronic properties due to…