Quantum-Confined Electronic States Arising from the Moire Pattern of MoS2-WSe2 Heterobilayers

被引：95

作者：

Pan, Yi ^{[1
,2
]}

Foelsch, Stefan ^{[1
]}

Nie, Yifan ^{[3
]}

Waters, Dacen ^{[4
]}

Lin, Yu-Chuan ^{[5
,6
]}

Jariwala, Bhakti ^{[5
,6
]}

Zhang, Kehao ^{[5
,6
]}

Cho, Kyeongjae ^{[3
]}

Robinson, Joshua A. ^{[5
,6
]}

Feenstra, Randall M. ^{[4
]}

机构：

[1] Paul Drude Inst Festkorperelekt, Hausvogteipl 5-7, D-10117 Berlin, Germany

[2] Xi An Jiao Tong Univ, Ctr Spintron & Quantum Syst, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China

[3] Univ Texas Dallas, Dept Mat Sci & Engn, Dallas, TX 75080 USA

[4] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

[5] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[6] Penn State Univ, Ctr Dimens & Layered Mat 2, University Pk, PA 16802 USA

来源：

NANO LETTERS | 2018年 / 18卷 / 03期

基金：

美国国家科学基金会;

关键词：

2D materials; heterostructures; transition metal dichalcogenides; scanning tunneling microscopy; scanning tunneling spectroscopy; SCANNING-TUNNELING-MICROSCOPY; HETEROSTRUCTURES; GRAPHENE; SURFACE; MOS2;

D O I：

10.1021/acs.nanolett.7b05125

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A two-dimensional (2D) heterobilayer system consisting of MoS2 on WSe2, deposited on epitaxial graphene, is studied by scanning tunneling microscopy and spectroscopy at temperatures of 5 and 80 K. A moire pattern is observed, arising from lattice mismatch of 3.7% between the MoS2 and WSe2. Significant energy shifts are observed in tunneling spectra observed at the maxima of the moire corrugation, as compared with spectra obtained at corrugation minima, consistent with prior work. Furthermore, at the minima of the moire corrugation, sharp peaks in the spectra at energies near the band edges are observed for spectra acquired at 5 K The peaks correspond to discrete states that are confined within the moire unit cells. Conductance mapping is employed to reveal the detailed structure of the wave functions of the states. For measurements at 80 K, the sharp peaks in the spectra are absent, and conductance maps of the band edges reveal little structure.

引用

页码：1849 / 1855

页数：7

共 37 条

[31] VIS-NIR-SWIR multicolor avalanche photodetector originating from quantum-confined Stark effect in Si/β-FeSi2/Si structure
Shevlyagin, A. V.
Goroshko, D. L.
Chusovitin, E. A.
Galkin, N. G.
APPLIED PHYSICS LETTERS, 2016, 109 (17)
[32] CdSe-MoS2: A Quantum Size-Confined Photocatalyst for Hydrogen Evolution from Water under Visible Light
Frame, F. Andrew
Osterloh, Frank E.
JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (23): : 10628 - 10633
[33] Polarization-dependent electronic structure of Ag quantum well states on the MoS2(0001) surface using ARPES and DFT studies
Kar, Arunava
Mahatha, Sanjoy Kr
Menon, Krishnakumar S. R.
PHYSICAL REVIEW B, 2022, 106 (23)
[34] CdSe:MoS2 nanoribbon composites as quantum confined photocatalysts for hydrogen evolution from solutions of sacrificial electron donors under visible light
Frame, F. A.
Osterloh, Frank E.
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2010, 239
[35] Approximate theoretical model for the five electronic states (Ω=5/2, 3/2, 3/2, 1/2, 1/2) arising from the ground 3d9 configuration in nickel halide molecules and for rotational levels of the two Ω=1/2 states in that manifold
Hougen, Jon T.
JOURNAL OF MOLECULAR SPECTROSCOPY, 2011, 267 (1-2) : 23 - 35
[36] ELECTRONIC-STRUCTURE OF EXCITED-STATES FOR B,C+, AND C ARISING FROM CONFIGURATION 1S2 2S 2PN - EFFECT OF REMOVAL OF EQUIVALENCE RESTRICTION
HORINO, Y
TATEWAKI, H
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, 1975, 9 (02) : 287 - 299
[37] Intramolecular stretching vibrational states and frequency shifts of (H2)2 confined inside the large cage of clathrate hydrate from an eight-dimensional quantum treatment using small basis sets
Felker, Peter M.
Lauvergnat, David
Scribano, Yohann
Benoit, David M.
Bacic, Zlatko
JOURNAL OF CHEMICAL PHYSICS, 2019, 151 (12):

← 1 2 3 4 →