基本信息
席郭灏：2023级 硕士生
办公地点：北园物理楼404
电子邮箱：2503233550@qq.com
电 话：+86-10-62517997
传 真：+86-10-62517887
邮 编：100872
教育经历
(1) 2023-09 至今, 中国人民大学, 物理学系, 硕士，在读
(2) 2019-09 至 2023-06, 重庆大学, 物理学院, 本科，理学学士
研究方向
二维材料的第一性原理计算
代表性论文
基本信息
朱华：2023级博士生
办公地点：北园物理楼404
电子邮箱：2023000460@ruc.edu.cn
电 话：+86-10-62517997
传 真：+86-10-62517887
邮 编：100872
教育经历
(1) 2023-09 至今, 中国人民大学, 物理学系, 博士，在读
(2) 2020-09 至 2023-06, 中国计量大学, 光学与电子科技学院, 工科硕士
研究方向
(1)表面物理第一性原理计算
(2)磁性材料第一性原理计算
代表性论文
Nature Communications 14, 2465 (2023)
Shuangzan Lu†, Deping Guo†, Zhengbo Cheng†, Yanping Guo†, Cong Wang, Jinghao Deng, Yusong Bai, Cheng Tian, Linwei Zhou, Youguo Shi, Jun He*,Wei Ji*, Chendong Zhang*
Abstract
The fabrication of one-dimensional (1D) magnetic systems on solid surfaces, although of high fundamental interest, has yet to be achieved for a crossover between two-dimensional (2D) magnetic layers and their associated 1D spin chain systems. In this study, we report the fabrication of 1D single-unit-cellwidth CrCl3 atomic wires and their stacked few-wire arrays on the surface of a van der Waals (vdW) superconductor NbSe2. Scanning tunneling microscopy/spectroscopy and first-principles calculations jointly revealed that the single wire shows an antiferromagnetic large-bandgap semiconducting state in an unexplored structure different from the well-known 2D CrCl3 phase. Competition among the total energies and nanostructure-substrate interfacial interactions of these two phases result in the appearance of the 1D phase. This phase was transformable to the 2D phase either prior to or after the growth for in situ or ex situ manipulations, in which the electronic interactions at the vdW interface play a nontrivial role that could regulate the dimensionality conversion and structural transformation between the 1D-2D CrCl3 phases.
DOI: 10.1038/s41467-023-38175-4
Online Preview
Advanced Materials 35, 2300572 (2023)
Yafei Li†, Qing Yuan†, Deping Guo†, Cancan Lou, Xingxia Cui, Guangqiang Mei, Hrvoje Petek, Limin Cao, Wei Ji*, and Min Feng*.
Abstract
After the preparation of 2D electronic flat band (EFB) in van der Waals (vdW) superlattices, recent measurements suggest the existence of 1D electronic flat bands (1D-EFBs) in twisted vdW bilayers. However, the realization of 1D-EFBs is experimentally elusive in untwisted 2D layers, which is desired considering their fabrication and scalability. Herein, the discovery of 1D-EFBs is reported in an untwisted in situ-grown two atomic-layer Bi(110)superlattice self-aligned on an SnSe(001) substrate using scanning probe microscopy measurements and density functional theory calculations. While the Bi-Bi dimers of Bi zigzag (ZZ) chains are buckled, the epitaxial lattice mismatch between the Bi and SnSe layers induces two 1D buckling reversal regions (BRRs) extending along the ZZ direction in each Bi(110)-11 x 17 supercell. A series of 1D-EFBs arises spatially following BRRs that isolate electronic states along the armchair (AC) direction and localize electrons in 1D extended states along ZZ due to quantum interference at a topological node. This work provides a generalized strategy for engineering 1D-EFBs in utilizing lattice mismatch between untwisted rectangular vdW layers.
Online Preview