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- Title
Exotic Spin-Orbital Physics in Hybrid Oxides.
- Authors
Brzezicki, Wojciech; Cuoco, Mario; Oleś, Andrzej
- Abstract
We compare the effective spin-orbital superexchange triggered by magnetic 3 d impurities with d and d configurations and either no orbital degree of freedom (orbital dilution) or hole replacing a doublon (charge dilution) in a 4 d Mott insulator with S=1 spins. Impurities causing orbital dilution act either as spin defects decoupled from the surrounding ions or generate orbital polarons along d - d hybrid bonds. The exchange on these bonds determines which orbital is occupied by a doublon on the host site. In case of charge dilution by 3 d impurities additional $\propto T_{i}^{+}T_{j}^{+}$ terms arise which enhance orbital fluctuations. We show that such terms may radically change orbital pattern at relatively low doping by x=1/8 hole defects. Our findings provide new perspective for future theoretical and experimental studies of doped transition metal oxides.
- Subjects
SPIN-orbit interactions; HYBRID securities; ANTIFERROMAGNETIC materials; SYMMETRY; PEROVSKITE
- Publication
Journal of Superconductivity & Novel Magnetism, 2017, Vol 30, Issue 1, p129
- ISSN
1557-1939
- Publication type
Article
- DOI
10.1007/s10948-016-3750-5