The topological Hall effect (THE) and its thermoelectric counterpart, the topological Nernst effect (TNE), are hallmarks of the skyrmion lattice phase (SkL). We observed the giant TNE of the SkL in centrosymmetric Gd2PdSi3, comparable in magnitude to the largest anomalous Nernst signals in ferromagnets. Significant enhancement (suppression) of the THE occurs when doping electrons (holes) to Gd2PdSi3. On the electron-doped side, the topological Hall conductivity approaches the characteristic threshold ∼1000(Ωcm)−1 for the intrinsic regime. We use the filling-controlled samples to confirm Mott's relation between TNE and THE and discuss the importance of Gd-5d orbitals for transport in this compound.
@article{arxiv.1910.06027,
title = {Topological Nernst effect of the two-dimensional skyrmion lattice},
author = {Max Hirschberger and Leonie Spitz and Takuya Nomoto and Takashi Kurumaji and Shang Gao and Jan Masell and Taro Nakajima and Akiko Kikkawa and Yuichi Yamasaki and Hajime Sagayama and Hironori Nakao and Yasujiro Taguchi and Ryotaro Arita and Taka-hisa Arima and Yoshinori Tokura},
journal= {arXiv preprint arXiv:1910.06027},
year = {2020}
}
Comments
Main text: 9 pages, 4 figures; with SI: 36 pages, 15 figures