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However, interfacial conductance mismatch, spin dephasing, and inefficient spin\u2010to\u2010charge conversion significantly reduce the efficiency of these processes. In this study, it is demonstrated that an all van der Waals heterostructure consisting of a ferromagnet (Fe<jats:sub>3<\/jats:sub>GeTe<jats:sub>2<\/jats:sub>) and Weyl semimetal enables a large spin readout efficiency. Specifically, a nonlocal spin readout signal of 150\u00a0m\u2126 and a local spin readout signal of 7.8\u00a0\u2126 is achieved, which reach the signal level useful for practical spintronic devices. The remarkable spin readout signal is attributed to suppressed spin dephasing channels at the vdW interfaces, long spin diffusion, and efficient charge\u2010spin interconversion in T<jats:sub>d<\/jats:sub>\u2010MoTe<jats:sub>2<\/jats:sub>. These findings highlight the potential of vdW heterostructures for spin Hall effect\u2010enabled spin detection with high efficiency, opening up new possibilities for spin\u2010orbit logic devices using vdW interfaces.<\/jats:p>","DOI":"10.1002\/smll.202403073","type":"journal-article","created":{"date-parts":[[2024,7,5]],"date-time":"2024-07-05T08:05:46Z","timestamp":1720166746000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Highly Efficient Spin Injection and Readout Across Van Der Waals Interface"],"prefix":"10.1002","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9734-3012","authenticated-orcid":false,"given":"Hao","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Chemistry National University of Singapore  Singapore 117543 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wanghao","family":"Tian","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering Nanyang Technological University  Singapore 639798 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lishu","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Physics National University of Singapore  Singapore 117551 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peng","family":"Song","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering Nanyang Technological University  Singapore 639798 Singapore"},{"name":"School of Materials Science and Engineering Nanyang Technological University  Singapore 639798 Singapore"},{"name":"CINTRA CNRS\/NTU\/THALES UMI 3288  Research Techno Plaza Singapore 637553 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lanxin","family":"Jia","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering National University of Singapore  Singapore 117575 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jingsheng","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering National University of Singapore  Singapore 117575 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhifeng","family":"Zhu","sequence":"additional","affiliation":[{"name":"School of Information Science and Technology ShanghaiTech University  Shanghai 201210 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuan Ping","family":"Feng","sequence":"additional","affiliation":[{"name":"Department of Physics National University of Singapore  Singapore 117551 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1491-743X","authenticated-orcid":false,"given":"Kian Ping","family":"Loh","sequence":"additional","affiliation":[{"name":"Department of Chemistry National University of Singapore  Singapore 117543 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,7,5]]},"reference":[{"key":"e_1_2_9_1_1","doi-asserted-by":"crossref","unstructured":"K.Garello F.Yasin G. 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