title: Stacking-Dependent Electronic Structure of Trilayer Graphene Resolved by Nanospot Angle-Resolved Photoemission Spectroscopy.
abstract: The crystallographic stacking order in multilayer graphene plays an important role in determining its electronic structure. In trilayer graphene, rhombohedral stacking (ABC) is particularly intriguing, exhibiting a flat band with an electric-field tunable band gap. Such electronic structure is distinct from simple hexagonal stacking (AAA) or typical Bernal stacking (ABA) and is promising for nanoscale electronics and optoelectronics applications. So far clean experimental electronic spectra on the first two stackings are missing because the samples are usually too small in size (μm or nm scale) to be resolved by conventional angle-resolved photoemission spectroscopy (ARPES). Here, by using ARPES with a nanospot beam size (NanoARPES), we provide direct experimental evidence for the coexistence of three different stackings of trilayer graphene and reveal their distinctive electronic structures directly. By fitting the experimental data, we provide important experimental band parameters for describing the electronic structure of trilayer graphene with different stackings.
authors.affiliation: State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University , Beijing 100084, P. R. China.
authors.forename: Changhua
authors.identifier: 0000-0002-8706-6541
authors.initials: C
authors.lastname: Bao
authors.affiliation: State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University , Beijing 100084, P. R. China.
authors.forename: Wei
authors.identifier: 0000-0003-4518-3632
authors.initials: W
authors.lastname: Yao
authors.affiliation: State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University , Beijing 100084, P. R. China.
authors.forename: Eryin
authors.initials: E
authors.lastname: Wang
authors.affiliation: L'Orme des Merisiers, Synchrotron SOLEIL , Saint Aubin-BP 48, 91192 Gif sur Yvette Cedex, France.
authors.forename: Chaoyu
authors.initials: C
authors.lastname: Chen
authors.affiliation: L'Orme des Merisiers, Synchrotron SOLEIL , Saint Aubin-BP 48, 91192 Gif sur Yvette Cedex, France.
authors.forename: José
authors.initials: J
authors.lastname: Avila
authors.affiliation: L'Orme des Merisiers, Synchrotron SOLEIL , Saint Aubin-BP 48, 91192 Gif sur Yvette Cedex, France.
authors.forename: Maria C
authors.initials: MC
authors.lastname: Asensio
authors.affiliation: State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University , Beijing 100084, P. R. China.|Collaborative Innovation Center of Quantum Matter, Beijing 100084, P. R. China.
authors.forename: Shuyun
authors.initials: S
authors.lastname: Zhou
keywords: AAA stacking; NanoARPES; flat band; rhombohedral (ABC) stacking; trilayer graphene