Nonlinear and nonreciprocal transport effects in untwinned thin films of ferromagnetic Weyl metal SrRuO$_3$
| العنوان: | Nonlinear and nonreciprocal transport effects in untwinned thin films of ferromagnetic Weyl metal SrRuO$_3$ |
|---|---|
| المؤلفون: | Kar, Uddipta, Lu, Elisha Cho-Hao, Singh, Akhilesh Kr., Reddy, P. V. Sreenivasa, Han, Youngjoon, Li, Xinwei, Cheng, Cheng-Tung, Yang, Song, Lin, Chun-Yen, Cheng, I-Chun, Hsu, Chia-Hung, Hsieh, D., Lee, Wei-Cheng, Guo, Guang-Yu, Lee, Wei-Li |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences |
| الوصف: | The identification of distinct charge transport features, deriving from nontrivial bulk band and surface states, has been a challenging subject in the field of topological systems. In topological Dirac and Weyl semimetals, nontrivial conical bands with Fermi-arc surfaces states give rise to negative longitudinal magnetoresistance due to chiral anomaly effect and unusual thickness dependent quantum oscillation from Weyl-orbit effect, which were demonstrated recently in experiments. In this work, we report the experimental observations of large nonlinear and nonreciprocal transport effects for both longitudinal and transverse channels in an untwinned Weyl metal of SrRuO$_3$ thin film grown on a SrTiO$_{3}$ substrate. From rigorous measurements with bias current applied along various directions with respect to the crystalline principal axes, the magnitude of nonlinear Hall signals from the transverse channel exhibits a simple sin$\alpha$ dependent at low temperatures, where $\alpha$ is the angle between bias current direction and orthorhombic [001]$_{\rm o}$, reaching a maximum when current is along orthorhombic [1-10]$_{\rm o}$. On the contrary, the magnitude of nonlinear and nonreciprocal signals in the longitudinal channel attains a maximum for bias current along [001]$_{\rm o}$, and it vanishes for bias current along [1-10]$_{\rm o}$. The observed $\alpha$-dependent nonlinear and nonreciprocal signals in longitudinal and transverse channels reveal a magnetic Weyl phase with an effective Berry curvature dipole along [1-10]$_{\rm o}$ from surface states, accompanied by 1D chiral edge modes along [001]$_{\rm o}$. Comment: 24 pages, 6 figures |
| اللغة: | English |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ec96c5e3964be8b08716bfe9e5f4d00Test http://arxiv.org/abs/2307.04482Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....2ec96c5e3964be8b08716bfe9e5f4d00 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |