Meissner Effect and Nonreciprocal Charge Transport in Non-Topological 1T-CrTe2/FeTe Heterostructures

Zi-Jie Yan; Ying-Ting Chan; Wei Yuan; Annie G. Wang; Hemian Yi; Zihao Wang; Lingjie Zhou; Hongtao Rong; Deyi Zhuo; Ke Wang; John Singleton; Laurel E. Winter; Weida Wu; Cui-Zu Chang

doi:10.1002/adma.202520598

arXiv · 2412.09354

Meissner Effect and Nonreciprocal Charge Transport in Non-Topological 1T-CrTe2/FeTe Heterostructures

Zi-Jie Yan·Ying-Ting Chan·Wei Yuan·Annie G. Wang·Hemian Yi·Zihao Wang·Lingjie Zhou·Hongtao Rong·Deyi Zhuo·Ke Wang·John Singleton·Laurel E. Winter·Weida Wu·Cui-Zu Chang

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Abstract

Interface-induced superconductivity has recently been achieved by stacking a magnetic topological insulator layer on an antiferromagnetic FeTe layer. However, the mechanism driving this emergent superconductivity remains unclear. Here, we employ molecular beam epitaxy to grow a 1T-CrTe2 layer, a two-dimensional ferromagnet with a Curie temperature up to room temperature, on a FeTe layer. These 1T-CrTe2/FeTe heterostructures show superconductivity with a critical temperature of ~12 K. Through magnetic force microscopy measurements, we observe the Meissner effect on the surface of the 1T-CrTe2 layer. Our electrical transport measurements reveal that the 1T-CrTe2/FeTe heterostructures exhibit nonreciprocal charge transport behavior, characterized by a large magneto-chiral anisotropy coefficient. The enhanced nonreciprocal charge transport in 1T-CrTe2/FeTe heterostructures provides a promising platform for exploring the magnetically controllable superconducting diode effect.

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cond-mat.supr-con cond-mat.mes-hall cond-mat.mtrl-sci

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Zi-Jie Yan, Ying-Ting Chan, Wei Yuan, Annie G. Wang, Hemian Yi, Zihao Wang, Lingjie Zhou, Hongtao Rong, Deyi Zhuo, Ke Wang, John Singleton, Laurel E. Winter, Weida Wu, Cui-Zu Chang. 2024-12-12. Meissner Effect and Nonreciprocal Charge Transport in Non-Topological 1T-CrTe2/FeTe Heterostructures. https://doi.org/10.1002/adma.202520598

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