Author(s): Wang, ZA (Wang, Zi-Ao); Xue, WS (Xue, Weishan); Yan, FG (Yan, Faguang); Zhu, WK (Zhu, Wenkai); Liu, Y (Liu, Yi); Zhang, XH (Zhang, Xinhui); Wei, ZM (Wei, Zhongming); Chang, K (Chang, Kai); Yuan, Z (Yuan, Zhe); Wang, KY (Wang, Kaiyou)

Source: NANO LETTERS Pages: 710-717 DOI: 10.1021/acs.nanolett.2c04796 Early Access Date: JAN 2023

Abstract: Charge transfer plays a key role at the interfaces of heterostructures, which can affect electronic structures and ultimately the physical properties of the materials. However, charge transfer is difficult to manipulate externally once the interface is formed. The recently discovered van der Waals ferromagnets with atomically sharp interfaces provided a perfect platform for the electrical control of interfacial charge transfer. Here, we report magnetoresistance experiments revealing electrically tunable charge transfer in Fe3GeTe2/Cr2Ge2Te6/Fe3GeTe2 all-magnetic van der Waals heterostructures, which can be exploited to selectively modify the switching fields of the top or bottom Fe3GeTe2 electrodes. The directional charge transfer from metallic Fe3GeTe2 to semiconducting Cr2Ge2Te6 is revealed by first-principles calculations, which remarkably modifies the magnetic anisotropy energy of Fe3GeTe2, leading to the dramatically suppressed coercivity. The electrically selective control of magnetism demonstrated in this study could stimulate the development of spintronic devices based on van der Waals magnets. KEYWORDS: controllable coercivity, charge transfer, Cr2Ge2Te6, Fe3GeTe2, van der Waals heterostructure

Accession Number: WOS:000926020000001

PubMed ID: 36626837

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

wei, zhong ming                  0000-0002-6237-0993

ISSN: 1530-6984

eISSN: 1530-6992

Full Text: https://pubs.acs.org/doi/10.1021/acs.nanolett.2c04796