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Updated: Jun 25, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Band structure asymmetry of bilayer graphene revealed by infrared spectroscopy
Z Q Li1, E A Henriksen, Z Jiang
1Department of Physics, University of California, San Diego, La Jolla, California 92093, USA. zhiqiang@physics.ucsd.edu
Abstract:
We report on infrared spectroscopy of bilayer graphene integrated in gated structures. We observe a significant asymmetry in the optical conductivity upon electrostatic doping of electrons and holes. We show that this finding arises from a marked asymmetry between the valence and conduction bands, which is mainly due to the inequivalence of the two sublattices within the graphene layer and the next-nearest-neighbor interlayer coupling. From the conductivity data, the energy difference of the two sublattices and the interlayer coupling energy are directly determined.
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