Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Václav Janiš"'
Autor:
Václav Janiš, Jiawei Yan
Publikováno v:
AIP Advances, Vol 12, Iss 3, Pp 035139-035139-6 (2022)
The zero-temperature physics of interacting quantum dots attached to superconducting leads is now well understood. The overall qualitative picture is obtained from the static mean-field approximation. The situation drastically changes at non-zero tem
Externí odkaz:
https://doaj.org/article/328c6e6b826040f89f5651735dd3011f
Publikováno v:
AIP Advances, Vol 10, Iss 12, Pp 125127-125127-6 (2020)
We study the low-temperature critical behavior of the one-dimensional Hubbard model near half filling caused by enhanced antiferromagnetic fluctuations. We use a mean-field-type approximation with a two-particle self-consistency renormalizing the bar
Externí odkaz:
https://doaj.org/article/4df86205c7c24898ade1500bec32d3a2
Autor:
Jiawei Yan, Václav Janiš
Publikováno v:
Physical Review B. 103
We develop the general many-body perturbation theory for a superconducting quantum dot represented by a single-impurity Anderson model attached to superconducting leads. We build our approach on a thermodynamically consistent mean-field approximation
Autor:
A. Klic, Václav Janiš
Publikováno v:
Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019).
The genesis of the Curie-Weiss magnetic response observed in most transition metals that are Fermi liquids at low temperatures has been an enigma for decades and has not yet been fully explained from microscopic principles. We show on the single-impu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd0b1d1caa0433d1d8ad8630d20a153c
Publikováno v:
Physica B: Condensed Matter. 536:704-707
We extend the spin-polarized effective-interaction approximation of the parquet renormalization scheme from Refs. [1,2] applied on the symmetric Anderson model by adding the low-temperature asymptotics of the total energy and the specific heat. We ca
Publikováno v:
AIP Advances, Vol 10, Iss 12, Pp 125127-125127-6 (2020)
We study the low-temperature critical behavior of the one-dimensional Hubbard model near half filling caused by enhanced antiferromagnetic fluctuations. We use a mean-field-type approximation with a two-particle self-consistency renormalizing the bar
Publikováno v:
Acta Physica Polonica A. 131:1042-1044
Publikováno v:
Scientific Reports
A single-level quantum dot with Coulomb repulsion attached to two superconducting leads is studied via the perturbation expansion in the interaction strength. We use the Nambu formalism and the standard many-body diagrammatic representation of the im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::426036aacbd5e6da8f5e937d5f2b1249
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/38693
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/38693
We present a construction of a mean-field theory for thermodynamic and spectral properties of correlated electrons reliable in the strong-coupling limit. We introduce an effective interaction determined self-consistently from the reduced parquet equa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca63c765708dc084af86eac3e8bb39ac