• 文献标题:   Magnetic Exchange Field Modulation of Quantum Hall Ferromagnetism in 2D van der Waals CrCl3/Graphene Heterostructures
  • 文献类型:   Article
  • 作  者:   WU YF, CUI QR, ZHU MY, LIU XJ, WANG Y, ZHANG JY, ZHENG XQ, SHEN JX, CUI P, YANG HX, WANG SG
  • 作者关键词:   bilayer graphene, chromium trichloride, 2d magnetic van der waals material, magnetic proximity coupling, exchange field, quantum hall state, quantum hall ferromagnetism
  • 出版物名称:   ACS APPLIED MATERIALS INTERFACES
  • ISSN:   1944-8244 EI 1944-8252
  • 通讯作者地址:  
  • 被引频次:   13
  • DOI:   10.1021/acsami.1c00551 EA FEB 2021
  • 出版年:   2021

▎ 摘  要

The efforts toward the experimental realization of spin-polarized transports in ideal materials or platforms, such as the magnetized graphene or various quantum Hall states, is a research hotspot in spintronics. Magnetic van der Waals materials open the door for exploring various physical phenomena, technologies, and integrating novel spintronic devices seamlessly within the 2D limit. Here, we demonstrate magnetic proximity effect in chromium trichloride (CrCl3)/bilayer graphene (BLG) heterostructures by low-temperature transport measurements. An effective exchange field induced in BLG has been demonstrated by the Zeeman spin Hall effect via nonlocal measurements. Furthermore, the exchange field modulates the quantum Hall ground state of BLG and thus favors the formation of a canted antiferromagnetic (CAF) phase in an external perpendicular magnetic field (B-perpendicular to). Asymmetric nonlocal magneto-transport behaviors are also observed at opposite B-perpendicular to directions, due to the asymmetric modulation on the exchange field by external B-perpendicular to directions. Our work suggests that the 2D magnetic van der Waals materials and graphene hybrid systems offer a unique platform for quantum Hall ferromagnetism physics.