Failure of the mean-field description of magnetic fluctuations in the superconducting quantum dot
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00559628" target="_blank" >RIV/68378271:_____/22:00559628 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0333617" target="_blank" >https://hdl.handle.net/11104/0333617</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/9.0000267" target="_blank" >10.1063/9.0000267</a>
Alternative languages
Result language
angličtina
Original language name
Failure of the mean-field description of magnetic fluctuations in the superconducting quantum dot
Original language description
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 temperatures. No reliable solutions apart from numerical simulations exist there. We show that any static mean-field approximation fails at non-zero temperatures since magnetic fluctuations induce dynamical corrections that lead to broadening of the in-gap state energies to energy bands. Spin-symmetric equilibrium state at non-zero temperatures is unstable with respect to magnetic fluctuations and the zero magnetic field can be reached only as a weak limit of the spin-polarized solution like in a magnetically ordered phase.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
AIP Advances
ISSN
2158-3226
e-ISSN
2158-3226
Volume of the periodical
12
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
035139
UT code for WoS article
000827492200006
EID of the result in the Scopus database
2-s2.0-85126720578