Manipulating Hubbard-type Coulomb blockade effect of metallic wires embedded in an insulator
作者机构：School of Physics and Wuhan National High Magnetic Field CenterHuazhong University of Science and Technology National Laboratory of Solid State Microstructures and Department of PhysicsNanjing University Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences RIKEN Center for Emergent Matter Science(CEMS) Department of Applied PhysicsUniversity of Tokyo Center for Advanced Quantum Studies Department of Physics Beijing Normal University Collaborative Innovation Center of Advanced MicrostructuresNanjing University Hubei Key Laboratory of Gravitation and Quantum PhysicsHuazhong University of Science and Technology Wuhan Institute of Quantum Technology
出 版 物：《National Science Review》 (国家科学评论(英文版))
年 卷 期：2023年第10卷第3期
页 面：127-133页
核心收录：
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
基 金：supported by the National Key Research and Development Program of China (2017YFA0403501,2022YFA1402400 and 2021YFA1400400) the National Natural Science Foundation of China (U20A6002, 11874161, 11774105,21873033 and 92165205) the Japan Science and Technology Agency,Core Research for Evolutional Science and Technology(JPMJCR1874 and JPMJCR16F1) the Japan Society for the Promotion of Science,KAKENHI (18H03676 and 26103006)
主 题：STM one-dimensional Coulomb effect electron correlation Hubbard
摘 要：Correlated states have emerged in low-dimensional systems owing to enhanced Coulomb interactions.Elucidating these states requires atomic-scale characterization and delicate control capabilities.Herein,spectroscopic imaging-scanning tunneling microscopy was employed to investigate the correlated states residing in 1D electrons of the monolayer and bilayer MoSe2 mirror twin boundary(MTB).The Coulomb energies,determined by the wire length,drive the MTB into two types of ground states with distinct respective out-of-phase and in-phase charge orders.The two ground states can be reversibly converted through a metastable zero-energy state with in situ voltage pulses,which tune the electron filling of the MTB via a polaronic process,substantiated by first-principles calculations.Our Hubbard model calculation with an exact diagonalization method reveals the ground states as correlated insulators from an on-site U-originated Coulomb interaction,dubbed the Hubbard-type Coulomb blockade effect.Our study lays a foundation for understanding and tailoring correlated physics in complex systems.
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