Hwang, Jinwoong Jin, Yeongrok Zhang, Canxun Zhu, Tiancong Kim, Kyoo Zhong, Yong Lee, Ji-Eun Shen, Zongqi Chen, Yi Ruan, Wei Ryu, Hyejin Hwang, Choongyu Lee, Jaekwang Crommie, Michael F. Mo, Sung-Kwan Shen, Zhi-Xun 2024-01-19T11:30:07Z 2024-01-19T11:30:07Z 2022-09-02 2022-09 0935-9648 https://pubs.kist.re.kr/handle/201004/114723 The spontaneous formation of electronic orders is a crucial element for understanding complex quantum states and engineering heterostructures in 2D materials. A novel 19$\sqrt {19} $ x19$\sqrt {19} $ charge order in few-layer-thick 1T-TaTe2 transition metal dichalcogenide films grown by molecular beam epitaxy, which has not been realized, is report. The photoemission and scanning probe measurements demonstrate that monolayer 1T-TaTe2 exhibits a variety of metastable charge density wave orders, including the 19$\sqrt {19} $ x 19$\sqrt {19} $ superstructure, which can be selectively stabilized by controlling the post-growth annealing temperature. Moreover, it is found that only the 19$\sqrt {19} $ x 19$\sqrt {19} $ order persists in 1T-TaTe2 films thicker than a monolayer, up to 8 layers. The findings identify the previously unrealized novel electronic order in a much-studied transition metal dichalcogenide and provide a viable route to control it within the epitaxial growth process. English WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim A Novel 19× 19 Superstructure in Epitaxially Grown 1T-TaTe2 Article 10.1002/adma.202204579 1 Advanced Materials, v.34, no.38 Advanced Materials 34 38 N scie scopus 000842320500001 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article CHARGE-DENSITY-WAVE transition metal dichalcogenides angle-resolved photoemission charge density waves molecular beam epitaxy tantalum ditellurides