Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Fomichev, Stepan"'
Autor:
Fomichev, Stepan, Hejazi, Kasra, Loaiza, Ignacio, Zini, Modjtaba Shokrian, Delgado, Alain, Voigt, Arne-Christian, Mueller, Jonathan E., Arrazola, Juan Miguel
X-ray absorption spectroscopy is a crucial experimental technique for elucidating the mechanisms of structural degradation in battery materials. However, extracting information from the measured spectrum is challenging without high-quality simulation
Externí odkaz:
http://arxiv.org/abs/2405.11015
Autor:
Fomichev, Stepan, Hejazi, Kasra, Zini, Modjtaba Shokrian, Kiser, Matthew, Morales, Joana Fraxanet, Casares, Pablo Antonio Moreno, Delgado, Alain, Huh, Joonsuk, Voigt, Arne-Christian, Mueller, Jonathan E., Arrazola, Juan Miguel
Quantum algorithms for ground-state energy estimation of chemical systems require a high-quality initial state. However, initial state preparation is commonly either neglected entirely, or assumed to be solved by a simple product state like Hartree-F
Externí odkaz:
http://arxiv.org/abs/2310.18410
It is well known that phonons can overscreen the bare Coulomb electron-electron repulsion, turning it into the effective attraction that binds the Cooper pairs responsible for BCS superconductivity. Here, we use a simple lattice model to prove that t
Externí odkaz:
http://arxiv.org/abs/2301.03530
Autor:
Carbone, Matthew R., Fomichev, Stepan, Millis, Andrew J., Berciu, Mona, Reichman, David R., Sous, John
Publikováno v:
J. Open Source Softw. 8, 5115 (2023)
We present an efficient implementation of the Generalized Green's function Cluster Expansion (GGCE), which is a new method for computing the ground-state properties and dynamics of polarons (single electrons coupled to lattice vibrations) in model el
Externí odkaz:
http://arxiv.org/abs/2210.12260
Autor:
Fomichev, Stepan, Berciu, Mona
Motivated to understand the phonon spectrum renormalization in the ground state of the half-filled SSH model, we use the Born-Oppenheimer approximation together with the harmonic approximation to evaluate the all-to-all real-space ionic force constan
Externí odkaz:
http://arxiv.org/abs/2110.00154
Motivated by the potential for cuprate-like superconductivity in monolayer rare-earth nickelate superlattices, we study the effects of crystal field splitting, lattice distortions and strain on the charge, magnetic, and orbital order in undoped two-d
Externí odkaz:
http://arxiv.org/abs/2106.12644
Publikováno v:
Phys. Rev. B 101, 024402 (2020)
We investigate the impact of electron-lattice coupling on the stability of various magnetic orders in rare-earth nickelates. We use the Hartree-Fock approximation, at zero temperature, to study an effective, two-band model with correlations character
Externí odkaz:
http://arxiv.org/abs/1909.06449
Akademický článek
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Akademický článek
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Autor:
Fomichev, Stepan Olegovich
The low-temperature magnetic order in the rare-earth nickelates is a subject of vigorous debate in the literature. Recent work emphasized the primary role of the electron-phonon coupling for the metal-insulator transition in the nickelates, and sugge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c13e4c4bee1e01fdd7a8ad9d033682f