Rashba-like spin-orbit and strain effects in tetragonal PbTiO3
Journal Article
·
· Physical Review B
- Univ. of Toulouse (France); Univ. of Arkansas, Fayetteville, AR (United States); OSTI
- Univ. of Toulouse (France)
- Univ. of Arkansas, Fayetteville, AR (United States)
- Univ. of Arkansas, Fayetteville, AR (United States); Univ. Paris-Saclay, Gif-sur-Yvette (France)
- Univ. of Arkansas, Fayetteville, AR (United States); Nanjing Univ. (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)
We performed first-principles calculations of the spin-orbit effect appearing in the electronic structure of the well-known ferroelectric perovskite oxide PbTiO3 and analyzed the results within group-theory-derived models. In this work we evidenced some non-negligible linear Rasbha spin splittings of the unoccupied $$\mathcal{p}$$ bands of Pb atoms and occupied $$\mathcal{p}$$ bands of oxygen atoms. Our calculations also show that a cubic spin splitting is present for the unoccupied $$d_{xy}$$ bands of Ti atoms. All these spin-orbit effects lead to complex spin textures reversible by switching the electric polarization, which could be used for future spinorbitronic applications. Our results also demonstrate how applying epitaxial strain could be envisaged to tune these properties by changing the relative energy of some of the bands or the magnitude of the linear/cubic coefficients describing the spin splitting.
- Research Organization:
- Univ. of Arkansas, Fayetteville, AR (United States)
- Sponsoring Organization:
- National Natural Science Foundation of China (NSFC); US Army Research Office (ARO); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0002220
- OSTI ID:
- 1801558
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 17 Vol. 100; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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