Realization of Two-Dimensional Intrinsic Polar Metal in a Buckled Honeycomb Binary Lattice

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 36 vom: 25. Sept., Seite e2404341
1. Verfasser:	Wang, Yihe (VerfasserIn)
Weitere Verfasser:	Li, Dong, Duan, Sisheng, Sun, Shuo, Ding, Yishui, Bussolotti, Fabio, Sun, Mingyue, Chen, Mingxi, Wang, Meng, Chen, Lan, Wu, Kehui, Goh, Kuan Eng Johnson, Wee, Andrew T S, Zhou, Miao, Feng, Baojie, Hua, Chenqiang, Huang, Yu Li, Chen, Wei
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2024
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article 2D polar metal angle‐resolved photoemission spectroscopy buckled honeycomb binary lattice dirac nodal lines/points first‐principles calculations

Beschreibung
Zusammenfassung:	© 2024 Wiley‐VCH GmbH. Structural topology and symmetry of a two-dimensional (2D) network play pivotal roles in defining its electrical properties and functionalities. Here, a binary buckled honeycomb lattice with C3v symmetry, which naturally hosts topological Dirac fermions and out-of-plane polarity, is proposed. It is successfully achieved in a group IV-V compound, namely monolayer SiP epitaxially grown on Ag(111) surface. Combining first-principles calculations with angle-resolved photoemission spectroscopy, the degeneration of the Dirac nodal lines to points due to the broken horizonal mirror symmetry is elucidated. More interesting, the SiP monolayer manifests metallic nature, which is mutually exclusive with polarity in conventional materials. It is further found that the out-of-plane polarity is strongly suppressed by the metallic substrate. This study not only represents a breakthrough of realizing intrinsic polarity in 2D metallic material via ingenious design but also provides a comprehensive understanding of the intricate interplay of many exotic low-dimensional quantum phenomena
Beschreibung:	Date Revised 18.09.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.202404341