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Dimensionality-strain phase diagram of strontium iridates

Autor(en)
Bongjae Kim, Peitao Liu, Cesare Franchini
Abstrakt

The competition between spin-orbit coupling, bandwidth (W), and electron-electron interaction (U) makes iridates highly susceptible to small external perturbations, which can trigger the onset of novel types of electronic and magnetic states. Here we employ first principles calculations based on density functional theory and on the constrained random phase approximation to study how dimensionality and strain affect the strength of U and W in (SrIrO3)(m)/(SrTiO3()) superlattices. The result is a phase diagram explaining two different types of controllable magnetic and electronic transitions, spin-flop and insulator-to-metal, connected with the disruption of the J(eff) = 1/2 state which cannot be understood within a simplified local picture.

Organisation(en)
Computergestützte Materialphysik
Externe Organisation(en)
Chinese Academy of Sciences (CAS)
Journal
Physical Review B
Band
95
Anzahl der Seiten
7
ISSN
2469-9950
DOI
https://doi.org/10.1103/PhysRevB.95.115111
Publikationsdatum
03-2017
Peer-reviewed
Ja
ÖFOS 2012
103025 Quantenmechanik, 103036 Theoretische Physik, 103015 Kondensierte Materie, 103009 Festkörperphysik
Schlagwörter
ASJC Scopus Sachgebiete
Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/3c0b5a6c-6d55-44d6-aa02-a04a628afd1f