Spectroscopic signature of obstructed surface states in SrIn2P2

Liu，Xiang Rui1,2; Deng，Hanbin1,2; Liu，Yuntian1,2; Yin，Zhouyi1; Chen，Congrun1; Zhu，Yu Peng1,2; Yang，Yichen3; Jiang，Zhicheng3; Liu，Zhengtai3; Ye，Mao3; Shen，Dawei3; Yin，Jia Xin4; Wang，Kedong1; Liu，Qihang1,2,5; Zhao，Yue1,2; Liu，Chang1,2

2023-12-01

10.1038/s41467-023-38589-0

Nature Communications   影响因子和分区

2041-1723

The century-long development of surface sciences has witnessed the discoveries of a variety of quantum states. In the recently proposed “obstructed atomic insulators”, symmetric charges are pinned at virtual sites where no real atoms reside. The cleavage through these sites could lead to a set of obstructed surface states with partial electronic occupation. Here, utilizing scanning tunneling microscopy, angle-resolved photoemission spectroscopy and first-principles calculations, we observe spectroscopic signature of obstructed surface states in SrInP. We find that a pair of surface states that are originated from the pristine obstructed surface states split in energy by a unique surface reconstruction. The upper branch is marked with a striking differential conductance peak followed by negative differential conductance, signaling its localized nature, while the lower branch is found to be highly dispersive. This pair of surface states is in consistency with our calculational results. Our finding not only demonstrates a surface quantum state induced by a new type of bulk-boundary correspondence, but also provides a platform for exploring efficient catalysts and related surface engineering.

SCI

英语

NI论文

第一 ; 通讯

National Natural Science Foundation of China-Yunnan Joint Fund[12074161];

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:001024186000027

NATURE PORTFOLIO

2-s2.0-85159806913

Scopus

1.Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics,Southern University of Science and Technology (SUSTech),Shenzhen,Guangdong,518055,China
2.International Quantum Academy,Shenzhen,Guangdong,518048,China
3.State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai,200050,China
4.Department of Physics,Princeton University,Princeton,08544,United States
5.Guangdong Provincial Key Laboratory of Computational Science and Material Design,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Liu，Xiang Rui,Deng，Hanbin,Liu，Yuntian,et al. Spectroscopic signature of obstructed surface states in SrIn2P2[J]. Nature Communications,2023,14(1).

Liu，Xiang Rui.,Deng，Hanbin.,Liu，Yuntian.,Yin，Zhouyi.,Chen，Congrun.,...&Liu，Chang.(2023).Spectroscopic signature of obstructed surface states in SrIn2P2.Nature Communications,14(1).

Liu，Xiang Rui,et al."Spectroscopic signature of obstructed surface states in SrIn2P2".Nature Communications 14.1(2023).