Skip to main content

Condensed Matter > Superconductivity

arXiv:2311.15835 (cond-mat)
[Submitted on 27 Nov 2023]

Title:Surface skyrmions and dual topological Hall effect in antiferromagnetic topological insulator EuCd$_2$As$_2$

Authors:Min Wu, R. Yang, Xiangde Zhu, Yixiong Ren, Ang Qian, Yongjie Xie, Changming Yue, Yong Nie, Xiang Yuan, Ning Wang, Daifeng Tu, Ding Li, Yuyan Han, Zhaosheng Wang, Yaomin Dai, Guolin Zheng, Jianhui Zhou, Wei Ning, Xianggang Qiu, Mingliang Tian
View PDF HTML (experimental)
Abstract:In this work, we synthesized single crystal of EuCd$_2$As$_2$, which exhibits A-type antiferromagnetic (AFM) order with in-plane spin orientation below $T_N$ = 9.5~this http URL spectroscopy and transport measurements suggest its topological insulator (TI) nature with an insulating gap around 0.1eV. Remarkably, a dual topological Hall resistivity that exhibits same magnitude but opposite signs in the positive to negative and negative to positive magnetic field hysteresis branches emerges below 20~K. With magnetic force microscopy (MFM) images and numerical simulations, we attribute the dual topological Hall effect to the Néel-type skyrmions stabilized by the interactions between topological surface states and magnetism, and the sign reversal in different hysteresis branches indicates potential coexistence of skyrmions and antiskyrmions. Our work uncovers a unique two-dimensional (2D) magnetism on the surface of intrinsic AFM TI, providing a promising platform for novel topological quantum states and AFM spintronic applications.
Comments: 7 pages, 3 figures
Subjects: Superconductivity (cond-mat.supr-con); Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:2311.15835 [cond-mat.supr-con]
  (or arXiv:2311.15835v1 [cond-mat.supr-con] for this version)
  https://doi.org/10.48550/arXiv.2311.15835

Submission history

From: Run Yang [view email]
[v1] Mon, 27 Nov 2023 13:59:53 UTC (12,374 KB)
Full-text links:

Access Paper:

  • View PDF
  • HTML (experimental)
  • TeX Source
license icon view license

Current browse context:

cond-mat.supr-con
< prev   |   next >
new | recent | 2023-11
Change to browse by:
cond-mat
cond-mat.mtrl-sci

References & Citations

Bookmark

BibSonomy Reddit

Bibliographic and Citation Tools

Bibliographic Explorer (What is the Explorer?)
Connected Papers (What is Connected Papers?)
Litmaps (What is Litmaps?)
scite Smart Citations (What are Smart Citations?)

Code, Data and Media Associated with this Article

alphaXiv (What is alphaXiv?)
CatalyzeX Code Finder for Papers (What is CatalyzeX?)
DagsHub (What is DagsHub?)
Gotit.pub (What is GotitPub?)
Hugging Face (What is Huggingface?)
ScienceCast (What is ScienceCast?)

Demos

Replicate (What is Replicate?)
Hugging Face Spaces (What is Spaces?)
TXYZ.AI (What is TXYZ.AI?)

Recommenders and Search Tools

Influence Flower (What are Influence Flowers?)
CORE Recommender (What is CORE?)
IArxiv Recommender (What is IArxiv?)

arXivLabs: experimental projects with community collaborators

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.

Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)