Theoretical investigation of excitonic magnetism in LaSrCoO4

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00498395" target="_blank" >RIV/68378271:_____/18:00498395 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1361-648X/aab0bb" target="_blank" >http://dx.doi.org/10.1088/1361-648X/aab0bb</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-648X/aab0bb" target="_blank" >10.1088/1361-648X/aab0bb</a>

Result language
angličtina
Original language name
Theoretical investigation of excitonic magnetism in LaSrCoO4
Original language description
We use the LDA+U approach to search for possible ordered ground states of LaSrCoO4. We find a staggered arrangement of magnetic multipoles to be stable over a broad range of Co 3d interaction parameters. This ordered state can be described as a spindensitywavetype condensate of xy⊗x2−y2 excitons carrying spin S=1. Further, we construct an effective strong-coupling model, calculate the exciton dispersion and investigate closing of the exciton gap, which marks the exciton condensation instability. Comparing the layered LaSrCoO4 with its pseudo cubic analog LaCoO3, we find that for the same interaction parameters the excitonic gap is smaller (possibly vanishing) in the layered cobaltite.n
Czech name
—
Czech description
—

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.)

Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)