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Theme 3 colloquium by dr. Wouter Jolie entitled "Quantization effects and spin-charge separation in metallic wires: mirror twin boundaries in monolayer MoS2 on graphene" (Lecture)

Tuesday 16 October 2018Add to my calendar
from 16:00
dr. Wouter Jolie, Radboud University

2018.09 Wouter Fotos 001aWith the help of scanning tunneling spectroscopy, ab initio calculations and analytical modeling we investigate one-dimensional, strongly correlated metallic states hosted by two different types of twin boundaries in monolayers of MoS2 grown on graphene [1]. Experimentally, these states are characterized by clear length-dependent quantization effects, by a gap in the density of states of the order of 100 meV around the Fermi level, and by a characteristic modulation of the local density of states along the wire which extends deep into the discrete states below and above the Fermi level. We highlight the relevance of spin-charge separation to understand the observed complex electronic structure and critically discuss our results in the light of previous related research [2-4].
[1] J. Hall, B. Pielić, C. Murray, W. Jolie, T. Wekking, C. Busse, M. Kralj, and T. Michely, 2D Mater. 5 (2018) 025005.
[2] H. Liu, L. Jiao, F. Yang, Y. Cai, X. Wu, W. Ho, C. Gao, J. Jia, N. Wang, H. Fan, W. Yao, and M. Xie, Phys. Rev. Lett. 113 (2014) 066105.
[3] S. Barja, S. Wickenburg, Z.-f. Liu, Y. Zhang, H. Ryu, M. M. Ugeda, Z. Hussain, Z.-X. Shen, S.-k. Mo,
E. Wong, M. B. Salmeron, F. Wang, M. F. Crommie, D. F. Ogletree, J. B. Neaton, and A. Weber-Bargioni. Nat. Phys. 12 (2016) 751.
[4] Y. Ma, H. C. Diaz, J. Avila, C. Chen, V. Kalappattil, R. Das, M.-H. Phan, T. Cadez, J. M. P. Carmelo, M.
C. Asensio, and M. Batzill, Nat. Commun. 8 (2017) 14231.