17 citations · 24 across the 7 of their papers we have counts for
7 papers
Anomalous temperature dependence of polaron mobility in a nonlinear double-well potential: unbiased X-propagator approach
Stefano Ragni, Osor S. Barišić, Naoto Nagaosa +1
We develop an unbiased X-propagator method for calculating finite-temperature optical conductivity and dc mobility for arbitrary nonlinear electron-phonon interaction. W…
Polarons with arbitrary nonlinear electron-phonon interaction
Stefano Ragni, Tomislav Miškić, Thomas Hahn +5
We develop an exact computational method based on numerical X-propagators for solving polaron models with arbitrary nonlinear couplings of local vibration modes to the electron den…
Polaron formation as the vertex function problem: From Dyck's paths to self-energy Feynman diagrams
Tomislav Miškić, Juraj Krsnik, Stefano Ragni +2
We present an iterative method for generating the complete set of self-energy Feynman diagrams at arbitrary order for the single-polaron problem with arbitrary linear coupling to t…
First-principles theory of nonlinear long-range electron-phonon interaction
Matthew Houtput, Luigi Ranalli, Carla Verdi +4
Describing electron-phonon interactions in a solid requires knowledge of the electron-phonon matrix elements in the Hamiltonian. State-of-the-art first-principles calculations for…
First-principles theory of nonlinear long-range electron-phonon interaction
Matthew Houtput, Luigi Ranalli, Carla Verdi +4
Electron-phonon interactions in solids are crucial for understanding many interesting phenomena, such as conventional superconductivity, temperature-dependent band-gap renormalizat…
Analytic method for quadratic polarons in nonparabolic bands
Serghei N. Klimin, Jacques Tempere, Matthew Houtput +4
Including the effect of lattice anharmonicity on electron-phonon interactions has recently garnered attention due to its role as a necessary and significant component in explaining…
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…