Wafer-scale 30°twisted bilayer graphene epitaxially grown on Cu_(0.75)Ni_(0.25)(111)  

作　　者：马鹏程 张翱 甄洪润 江志诚 杨逸尘 丁建阳 刘正太 刘吉山 沈大伟 于庆凯 刘丰 张学富 刘中灏 Peng-Cheng Ma;Ao Zhang;Hong-Run Zhen;Zhi-Cheng Jiang;Yi-Chen Yang;Jian-Yang Ding;Zheng-Tai Liu;Ji-Shan Liu;Da-Wei Shen;Qing-Kai Yu;Feng Liu;Xue-Fu Zhang;Zhong-Hao Liu(School of Physical Science and Technology,Ningbo University,Ningbo 315211,China;Institute of High-Pressure Physics,Ningbo University,Ningbo 315211,China;National Key Laboratory of Materials for Integrated Circuits,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China)

机构地区：[1]School of Physical Science and Technology,Ningbo University,Ningbo 315211,China [2]Institute of High-Pressure Physics,Ningbo University,Ningbo 315211,China [3]National Key Laboratory of Materials for Integrated Circuits,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China [4]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [5]National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China

出　　处：《Chinese Physics B》2024年第6期467-471,共5页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China (Grant Nos. 2022YFB3608000 and 2022YFA1204900);the National Natural Science Foundation of China (Grant Nos. 12222413 and 12074205);the Natural Science Foundation of Shanghai (Grant Nos. 23ZR1482200 and 22ZR1473300);the Natural Science Foundation of Zhejiang Province (Grant No. LQ21A040004);the funding of Ningbo University (Grant No. LJ2024003)。

摘　　要：Twisted bilayer graphene(TBG) has been extensively studied because of its novel physical properties and potential application in electronic devices.Here we report the synthesis and characterization of 300 TBG naturally grown on Cu_(0.75)Ni_(0.25)(111) film and investigate the electronic structure by angle-resolved photoemission spectroscopy.Compared with other substrates,our TBG with a wafer scale is acquired with a shorter growth time.The Fermi velocity and energy gap of Dirac cones of TBG are comparable with those of a monolayer on Cu_(0.85)Ni_(0.15)(111).The signature of moré lattices has not been observed in either the low-energy electron diffraction patterns or the Fermi surface map within experimental resolution,possibly due to different Cu and Ni contents in the substrates enhancing the different couplings between the substrate and the first/second layers and hindering the formation of a quasiperiodic structure.

关 键 词：twisted bilayer graphene electronic structure Cu/Ni(111) 

分 类 号：TQ127.11[化学工程—无机化工] O469[理学—凝聚态物理]