Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Mateusz Snamina"'
Autor:
Mateusz Snamina, Andrzej M Oleś
Publikováno v:
New Journal of Physics, Vol 21, Iss 2, p 023018 (2019)
We show that even when spins and orbitals disentangle in the ground state, spin excitations are renormalized by the local tuning of e _g orbitals in ferromagnetic planes of K _2 CuF _4 and LaMnO _3 . As a result, dressed spin excitations (magnons) ob
Externí odkaz:
https://doaj.org/article/0f000a82066f4d6abf8233457e3d0e0e
Autor:
Mateusz Snamina, Emil J. Zak
Publikováno v:
Open Systems & Information Dynamics. 27:2050001
In the present paper we show a link between bistochastic quantum channels and classical maps. The primary goal of this work is to analyse the multiplicative structure of the Birkhoff polytope of order 3 (the simplest nontrivial case). A suitable comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e7fe0e10408bcc5db64596ca9ed88ba
https://doi.org/10.1142/s1230161220500018
https://doi.org/10.1142/s1230161220500018
Autor:
Mateusz Snamina, Andrzej M. Oleś
The model developed for LaMnO$_3$ addresses the spin-orbital order by superexchange and Jahn-Teller orbital interactions in the cubic (perovskite) symmetry up to now whereas real crystal structure is strongly deformed. We identify and explain three \
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5387eba077e9190edb903417a07b745d
https://ruj.uj.edu.pl/xmlui/handle/item/55063
https://ruj.uj.edu.pl/xmlui/handle/item/55063
Autor:
Andrzej M. Oleś, Mateusz Snamina
We show that even when spins and orbitals disentangle in the ground state, spin excitations are renormalized by the local tuning of $e_g$ orbitals in ferromagnetic planes of K$_2$CuF$_4$ and LaMnO$_3$. As a result, dressed spin excitations (magnons)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d16d1460262bec1df1d80a0d0ddf06c3
Publikováno v:
Journal of computational chemistry. 38(28)
An extension of the extant microelectrostatic methodologies, based on the concept of distributed generalized polarizability matrix derived from the Coupled Perturbed Hartree-Fock (CPHF) equations, is proposed for self-consistent calculation of charge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be03682e5f1ca651fcb39f0121a0acd2
https://pubmed.ncbi.nlm.nih.gov/28766725
https://pubmed.ncbi.nlm.nih.gov/28766725
Autor:
Mateusz Snamina, Andrzej M. Oleś
We investigate the evolution of spin and orbital order in undoped LaMnO$_3$ under increasing temperature with a model including both superexchange and Jahn-Teller interactions. We used several cluster mean field calculation schemes and find coexistin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bc2c86e16170bac3680f7732f66b79e
http://arxiv.org/abs/1612.08016
http://arxiv.org/abs/1612.08016
Autor:
Piotr Petelenz, Mateusz Snamina
Publikováno v:
Chemphyschem : a European journal of chemical physics and physical chemistry. 18(1)
In acene-based molecular crystals, singlet exciton fission occurs through superexchange mediated by two virtual charge-transfer states. Hence, it is sensitive to their energies, which depend on the local environment. The crucial point is the balance
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1be369a6d01685f94fa222943e9d5b6f
https://pubmed.ncbi.nlm.nih.gov/27865042
https://pubmed.ncbi.nlm.nih.gov/27865042
Autor:
Mateusz Snamina, Piotr Petelenz
Publikováno v:
The journal of physical chemistry letters. 7(10)
Photovoltaic yield is normally limited to at most two charge carriers per photon. In solid pentacene this limit may be potentially bypassed owing to singlet exciton fission into a pair of triplets. The process occurs via a superexchange mechanism med
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff21a9cc60281d1eecac0debb2492028
https://pubmed.ncbi.nlm.nih.gov/27152577
https://pubmed.ncbi.nlm.nih.gov/27152577
According to recent ab initio calculations, the energy gap between the two oppositely polarized charge-transfer (CT) states of a model pentacene dimer is anomalously large, attaining 0.8 eV. Here we introduce the self-consistent charge field approach
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e75e388029fd20dfdf5e3a8475d2cef
http://ruj.uj.edu.pl/xmlui/handle/item/17432
http://ruj.uj.edu.pl/xmlui/handle/item/17432
Autor:
Mateusz Snamina, Piotr Petelenz
Singlet exciton fission in pentacene is commonly described in terms of the dimer model, containing some adjustable parameters that implicitly account for the influence of the crystalline environment. Here we use state-of-the-art results published by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::453e677025892babb09021c63b640b02
http://ruj.uj.edu.pl/xmlui/handle/item/21359
http://ruj.uj.edu.pl/xmlui/handle/item/21359