title: Oscillating edge states in one-dimensional MoS2nanowires.
abstract: Reducing the dimensionality of transition metal dichalcogenides to one dimension opens it to structural and electronic modulation related to charge density wave and quantum correlation effects arising from edge states. The greater flexibility of a molecular scale nanowire allows a strain-imposing substrate to exert structural and electronic modulation on it, leading to an interplay between the curvature-induced influences and intrinsic ground-state topology. Herein, the templated growth of MoS2nanowire arrays consisting of the smallest stoichiometric MoS2building blocks is investigated using scanning tunnelling microscopy and non-contact atomic force microscopy. Our results show that lattice strain imposed on a nanowire causes the energy of the edge states to oscillate periodically along its length in phase with the period of the substrate topographical modulation. This periodic oscillation vanishes when individual MoS2nanowires join to form a wider nanoribbon, revealing that the strain-induced modulation depends on in-plane rigidity, which increases with system size.
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Driver 3, Singapore 117543, Singapore.|Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore 117546, Singapore.
authors.forename: Hai
authors.initials: H
authors.lastname: Xu
authors.affiliation: Department of Physics, National University of Singapore, Singapore 117551, Singapore.
authors.forename: Shuanglong
authors.initials: S
authors.lastname: Liu
authors.affiliation: Department of Physics, National University of Singapore, Singapore 117551, Singapore.|SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
authors.forename: Zijing
authors.initials: Z
authors.lastname: Ding
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Driver 3, Singapore 117543, Singapore.|NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore , Centre for Life Sciences, #05-01, 28 Medical Drive, Singapore 117456 Singapore.
authors.forename: Sherman J R
authors.initials: SJ
authors.lastname: Tan
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Driver 3, Singapore 117543, Singapore.|Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore 117546, Singapore.
authors.forename: Kah Meng
authors.initials: KM
authors.lastname: Yam
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Driver 3, Singapore 117543, Singapore.
authors.forename: Yang
authors.identifier: 0000-0001-9868-4946
authors.initials: Y
authors.lastname: Bao
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Driver 3, Singapore 117543, Singapore.
authors.forename: Chang Tai
authors.initials: CT
authors.lastname: Nai
authors.affiliation: Institute of High Performance Computing, Agency for Science, Technology and Research, 1 Fusionopolis Way #16-16 Connexis, Singapore 138632, Singapore.
authors.forename: Man-Fai
authors.initials: MF
authors.lastname: Ng
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Driver 3, Singapore 117543, Singapore.|Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore 117546, Singapore.
authors.forename: Jiong
authors.initials: J
authors.lastname: Lu
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Driver 3, Singapore 117543, Singapore.|Department of Physics, National University of Singapore, Singapore 117551, Singapore.
authors.forename: Chun
authors.identifier: 0000-0002-1581-5806
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Driver 3, Singapore 117543, Singapore.|Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore 117546, Singapore.
authors.forename: Kian Ping
authors.initials: KP
authors.lastname: Loh