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oai:figshare.com:article/34020464 2026-09-29T02:06:27Z category_1 category_915 category_21 category_24 category_272 category_873 category_69 portal_63 item_type_6 month_year_09_2026

Termination-Dependent Surface States and Magnetic Fingerprints of Chiral Helimagnet Cr_1/3TaS₂ Bo Liang (450389) Xue Li (285380) Congcong Le (17494716) Zirui Wu (16916595) Wenpei Zhu (25133759) Neng Cai (14387604) Yong-Chang Lau (18242242) Xianxin Wu (7901618) Jiayu Liu (3951515) Zhanfeng Liu (468261) Hongen Zhu (9127393) Tongrui Li (21565027) Zhicheng Jiang (3992522) Yu Huang (15093) Wenchuan Jing (25133762) Xun Ma (737876) Qi Jiang (33521) Hang Li (123039) Zhihao Cai (11022461) Xuezhi Chen (4683217) Gexing Qu (25133765) Yiwei Cheng (2848427) Bing-Jie Chen (20765447) Zhengtai Liu (12874199) Dawei Shen (324896) Mao Ye (168067) Shengtao Cui (9127387) Zhe Sun (328682) Koji Miyamoto (571705) Taichi Okuda (4067662) Kenya Shimada (1671751) Yaobo Huang (5714084) Zhenhua Chen (436227) Lin Zhao (92451) Baojie Feng (1895827) Xinguo Ren (1262844) Wenhong Wang (525318) Xingjiang Zhou (10524782) Guodong Liu (278986) Biophysics Physical Sciences not elsewhere classified Biotechnology Evolutionary Biology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Inorganic Chemistry nanoscale spin ordering direct spectroscopic fingerprint direct experimental studies despite growing interest underlying magnetic order interface electronic structures ∼ 142 k dimensional spintronic devices magnetic transition (< >< sub >< resolved photoemission spectroscopy chiral helimagnets based dependent surface states 3 </ sub 2 </ sub surface electronic states chiral helimagnet cr electronic states chiral spintronic chiral helimagnets magnetic fingerprints k ̅</ intercalated transition chiral magnetism c </ ></ sub valleytronic micro systematically investigate strongly coupled splitting disappears resolved first resolution angle representative example principles calculations powerful route potential relevance point arising model system microscopic understanding microfocused beam metal dichalcogenides g ., Chiral helimagnets based on intercalated transition-metal dichalcogenides, characterized by nanoscale spin ordering, provide a powerful route to engineer chiral spin textures (e.g., the topologically protected magnetic solitons) and explore emergent electronic functionalities associated with their surface and interface electronic structures. However, despite growing interest, direct experimental studies of termination-dependent surface electronic structures and their temperature-driven magnetic evolution remain largely unexplored, hindering a microscopic understanding of the electronic states that is crucial for the development of low-dimensional spintronic devices. Here, taking Cr_1/3TaS₂ as a representative example, we systematically investigate the termination-dependent surface electronic states of the chiral helimagnets and uncover their distinct temperature evolution across the magnetic transition (<i>T</i>_<i>C</i> ∼ 142 K) by combining high-resolution angle-resolved photoemission spectroscopy with a microfocused beam and surface-state-resolved first-principles calculations. The TaS₂-terminated surface hosts folded monolayer-like TaS₂ bands under the √3 × √3 superlattice potential and a shallow triangular electron pocket at the superlattice <i>K̅</i> point arising from Cr–Ta orbital hybridization. In contrast, the Cr-terminated surface exhibits reconstructed hole pockets with pronounced magnetic band splitting. This splitting disappears above <i>T</i>_<i>C</i> and closely follows the temperature evolution of the magnetization, providing a direct spectroscopic fingerprint of the underlying magnetic order. In addition, multiple ultranarrow Cr-<i>d</i>-derived surface flat bands are resolved. These findings demonstrate that Cr_1/3TaS₂ serves as a model system in which surface electronic states are strongly coupled to chiral magnetism, with potential relevance to chiral spintronic and valleytronic micro/nanodevices. 2026-09-28T00:00:00Z Text Journal contribution 10.1021/acsnano.6c08594.s001 https://figshare.com/articles/journal_contribution/Termination-Dependent_Surface_States_and_Magnetic_Fingerprints_of_Chiral_Helimagnet_Cr_sub_1_3_sub_TaS_sub_2_sub_/34020464 CC BY-NC 4.0