ZrTe2/CrTe2: an epitaxial van der Waals platform for spintronics

Ou, Yongxi; Yanez, Wilson; Xiao, Run; Stanley, Max; Ghosh, Supriya; Zheng, Boyang; Jiang, Wei; Huang, Yu-Sheng; Pillsbury, Timothy; Richardella, Anthony; Liu, Chaoxing; Low, Tony; Crespi, Vincent H.; Mkhoyan, K. Andre; Samarth, Nitin

doi:10.1038/s41467-022-30738-1

Title: ZrTe2/CrTe2: an epitaxial van der Waals platform for spintronics

Journal Article · Fri May 27 00:00:00 EDT 2022 · Nature Communications

DOI:https://doi.org/10.1038/s41467-022-30738-1· OSTI ID:1870200

Ou, Yongxi;

; Xiao, Run; Stanley, Max;

; Zheng, Boyang;

; Huang, Yu-Sheng; Pillsbury, Timothy; Richardella, Anthony;

;

Abstract The rapid discovery of two-dimensional (2D) van der Waals (vdW) quantum materials has led to heterostructures that integrate diverse quantum functionalities such as topological phases, magnetism, and superconductivity. In this context, the epitaxial synthesis of vdW heterostructures with well-controlled interfaces is an attractive route towards wafer-scale platforms for systematically exploring fundamental properties and fashioning proof-of-concept devices. Here, we use molecular beam epitaxy to synthesize a vdW heterostructure that interfaces two material systems of contemporary interest: a 2D ferromagnet (1T-CrTe ₂ ) and a topological semimetal (ZrTe ₂ ). We find that one unit-cell (u.c.) thick 1T-CrTe ₂ grown epitaxially on ZrTe ₂ is a 2D ferromagnet with a clear anomalous Hall effect. In thicker samples (12 u.c. thick CrTe ₂ ), the anomalous Hall effect has characteristics that may arise from real-space Berry curvature. Finally, in ultrathin CrTe ₂ (3 u.c. thickness), we demonstrate current-driven magnetization switching in a full vdW topological semimetal/2D ferromagnet heterostructure device.

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Research Organization:: Johns Hopkins Univ., Baltimore, MD (United States); Energy Frontier Research Centers (EFRC) (United States). Institute for Quantum Matter (IQM)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundation (NSF); National Institute of Standards and Technology (NIST)

Grant/Contract Number:: SC0019331; DMR-2039351; DMR-2011401; ECCS-2025124

OSTI ID:: 1870200

Alternate ID(s):: OSTI ID: 1904343

Journal Information:: Nature Communications, Journal Name: Nature Communications Vol. 13 Journal Issue: 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Title: ZrTe2/CrTe2: an epitaxial van der Waals platform for spintronics

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