Bibliographic Details
| Title: |
Spin Hall effect in 2D metallic delafossite PtCoO$_2$ and vicinity topology |
| Authors: |
Kitamura, Sota, Usui, Hidetomo, Slager, Robert-Jan, Bouhon, Adrien, Sunko, Veronika, Rosner, Helge, King, Philip D. C., Orenstein, Joseph, Moessner, Roderich, Mackenzie, Andrew P., Kuroki, Kazuhiko, Oka, Takashi |
| Publication Year: |
2018 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
| More Details: |
The two-dimensional (2D) metal PtCoO$_2$ is renowned for the lowest room temperature resistivity among all oxides, close to that of the top two materials Ag and Cu. In addition, we theoretically predict a strong intrinsic spin Hall effect. This originates from six strongly-tilted Dirac cones that we find in the electronic structure near the Fermi surface, where a gap is opened by large spin-orbit coupling (SOC). This is underpinned by rich topological properties; in particular, the phenomenology of a mirror Chern metal is realized not exactly, but very accurately, on account of an approximate crystalline symmetry. We expect that such 'vicinity topology' to be a feature of relevance well beyond this material. Our Wilson loop analysis indicates further elaborate features such as fragile topology. These findings highlight PtCoO$_2$ as a promising material for spintronic applications as well as a platform to study the interplay of symmetry and topology.
Comment: 9 pages, 7 figures |
| Document Type: |
Working Paper |
| Access URL: |
http://arxiv.org/abs/1811.03105 |
| Accession Number: |
edsarx.1811.03105 |
| Database: |
arXiv |
