Novel single-layer vanadium sulphide phases

被引：58

作者：

Arnold, Fabian ^{[1
]}

Stan, Raluca-Maria ^{[1
]}

Mahatha, Sanjoy K. ^{[1
]}

Lund, H. E. ^{[1
]}

Curcio, Davide ^{[1
]}

Dendzik, Maciej ^{[1
]}

Bana, Harsh ^{[2
]}

Travaglia, Elisabetta ^{[2
]}

Bignardi, Luca ^{[3
]}

Lacovig, Paolo ^{[3
]}

Lizzit, Daniel ^{[3
]}

Li, Zheshen ^{[1
]}

Bianchi, Marco ^{[1
]}

Miwa, Jill A. ^{[1
]}

Bremholm, Martin ^{[4
]}

Lizzit, Silvano ^{[3
]}

Hofmann, Philip ^{[1
]}

Sanders, C. E. ^{[1
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus C, Denmark

[2] Univ Trieste, Dept Phys, Via Valerio 2, I-34127 Trieste, Italy

[3] Elettra Sincrotrone Trieste SCpA, AREA Sci Pk,Str Statale 14,Km 163-5, I-34149 Trieste, Italy

[4] Aarhus Univ, Dept Chem, DK-8000 Aarhus C, Denmark

来源：

2D MATERIALS | 2018年 / 5卷 / 04期

关键词：

x-ray photoelectron diffraction; scanning tunneling microscopy; x-ray photoelectron spectroscopy; VS2; low-energy electron diffraction; X-RAY PHOTOELECTRON; TRANSITION; FERROMAGNETISM; SPECTROSCOPY; NANOSHEETS; CRYSTAL; MOS2; SE;

D O I：

10.1088/2053-1583/aad0c8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

VS2 is a challenging material to prepare stoichiometrically in the bulk, and the single layer has not been successfully isolated before now. Here we report the first realization of single-layer VS2, which we have prepared epitaxially with high quality on Au(1 1 1) in the octahedral (1T) structure. We find that we can deplete the VS2 lattice of S by annealing in vacuum so as to create an entirely new 2D compound that has no bulk analogue. The transition is reversible upon annealing in an H2S gas atmosphere. We report the structural properties of both the stoichiometric and S-depleted compounds on the basis of low-energy electron diffraction, x-ray photoelectron spectroscopy and diffraction, and scanning tunneling microscopy experiments.

引用

页数：11

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