Spectral functions of CVD grown MoS2 monolayers after chemical transfer onto Au surface

DOI: 10.1016/j.apsusc.2020.147390

Authors: Sung Won Jung (Diamond Light Source) , Sangyeon Pak (Sungkyunkwan University (SKKU)) , Sanghyo Lee (University of Cambridge) , Sonka Reimers (Diamond Light Source; University of Nottingham) , Saumya Mukherjee (Diamond Light Source; University of Oxford) , Pavel Dudin (Diamond Light Source) , Timur K. Kim (Diamond Light Source) , Mattia Cattelan (University of Bristol) , Neil Fox (University of Bristol) , Sarnjeet S. Dhesi (Diamond Light Source) , Cephise Cacho (Diamond Light Source) , Seungnam Cha (Sungkyunkwan University (SKKU))
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Applied Surface Science

State: Published (Approved)
Published: July 2020
Diamond Proposal Number(s): 24367 , 22901

Abstract: The recent rise of van der Waals (vdW) crystals has opened new prospects for studying versatile and exotic fundamental physics with future device applications such as twistronics. Even though the recent development on Angle-resolved photoemission spectroscopy (ARPES) with Nano-focusing optics, making clean surfaces and interfaces of chemically transferred crystals have been challenging to obtain high-resolution ARPES spectra. Here, we show that by employing nano-ARPES with submicron sized beam and polystyrene-assisted transfer followed by annealing process in ultra-high vacuum environment, remarkably clear ARPES spectral features such as spin-orbit splitting and band renormalization of CVD-grown, monolayered MoS2 can be measured. Our finding paves a way to exploit chemically transferred crystals for measuring high-resolution ARPES spectra to observe exotic quasi-particles in vdW heterostructures.

Journal Keywords: MoS2 monolayer; nano-ARPES; chemical vapor deposition; polymer-assisted transfer; inelastic scattering

Subject Areas: Materials, Physics


Instruments: I05-ARPES , I06-Nanoscience

Other Facilities: Bristol NanoESCA Facility