Abstract
Rashba interfaces yield efficient spin-charge interconversion and give rise to nonreciprocal transport phenomena. Here, we report magnetotransport experiments in few-nanometer-thick films of PdCoO2, a delafossite oxide known to display a large Rashba splitting and surface ferromagnetism. By analyzing the angle dependence of the first- and second-harmonic longitudinal and transverse resistivities, we identify a Rashba-driven unidirectional magnetoresistance that competes with the anomalous Nernst effect below the Curie point. We estimate a Rashba coefficient of 0.75 ± 0.3 eV Å and argue that our results qualify delafossites as a new family of oxides for nanospintronics and spin-orbitronics, beyond perovskite materials.
Original language | English |
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Pages (from-to) | 8687-8692 |
Number of pages | 6 |
Journal | Nano Letters |
Volume | 21 |
Issue number | 20 |
DOIs | |
Publication status | Published - 2021 Oct 27 |
Keywords
- Rashba-type spin-orbit interaction
- delafossite nanofilms
- magnetoresistance
- nonreciprocal transport
- surface and interfacial phenomena
- surface ferromagnetism
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering