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Condensed Matter > Materials Science

arXiv:2411.01010 (cond-mat)
[Submitted on 1 Nov 2024]

Title:Optical Band Engineering of Monolayer WSe2 in a Scanning Tunneling Microscope

Authors:Xuehao Wu, Thomas P. Darlington, Madisen A. Holbrook, Emanuil S. Yanev, Luke N. Holtzman, Xiaodong Xu, James C. Hone, D. N. Basov, P. James Schuck, Abhay N. Pasupathy
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Abstract:Intense electromagnetic fields can result in dramatic changes in the electronic properties of solids. These changes are commonly studied using optical probes of the modified electronic structure. Here we use optical-scanning tunneling microscopy (optical-STM) equipped with near-field continuous wave (CW) laser excitation to directly measure the electronic structure of light-dressed states in a monolayer transition metal dichalcogenide (TMD) semiconductor, WSe2. We find that the effective tunneling gap and tunneling density of states are strongly influenced by the intensity of the electromagnetic field when the applied field is resonant with the bandgap of the semiconductor. Our findings indicate that CW laser excitation can be used to generate light-dressed electronic states of quantum materials when confined strongly to the nanoscale.
Subjects: Materials Science (cond-mat.mtrl-sci); Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Cite as: arXiv:2411.01010 [cond-mat.mtrl-sci]
  (or arXiv:2411.01010v1 [cond-mat.mtrl-sci] for this version)
  https://doi.org/10.48550/arXiv.2411.01010

Submission history

From: Xuehao Wu [view email]
[v1] Fri, 1 Nov 2024 20:27:37 UTC (3,724 KB)
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