Strong correlations and orbital texture in single-layer 1T-TaSe2

Strong electron correlation can induce Mott insulating behaviour and produce intriguing states of matter such as unconventional superconductivity and quantum spin liquids. Recent advances in van der Waals material synthesis enable the exploration of Mott systems in the two-dimensional limit. Here we...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:Nature physics Ročník 16; číslo 2; s. 218 - 224
Hlavní autori: Chen, Yi, Ruan, Wei, Wu, Meng, Tang, Shujie, Ryu, Hyejin, Tsai, Hsin-Zon, Lee, Ryan L., Kahn, Salman, Liou, Franklin, Jia, Caihong, Albertini, Oliver R., Xiong, Hongyu, Jia, Tao, Liu, Zhi, Sobota, Jonathan A., Liu, Amy Y., Moore, Joel E., Shen, Zhi-Xun, Louie, Steven G., Mo, Sung-Kwan, Crommie, Michael F.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: London Nature Publishing Group UK 01.02.2020
Nature Publishing Group
Nature Publishing Group (NPG)
Predmet:
140/146
639/766/119/544
639/766/119/995
639/766/119/999
Atomic
Classical and Continuum Physics
Complex Systems
Condensed Matter Physics
Correlation
Electronic properties
electronic properties and materials
Energy
Energy gap
Graphene
Interlayers
Laboratories
MATERIALS SCIENCE
Mathematical and Computational Physics
Microscopy
Molecular
Molecular beam epitaxy
Monolayers
Optical and Plasma Physics
Photoelectric emission
Physics
Physics and Astronomy
quantum fluids and solids
Scanning tunneling microscopy
Science
Spectrum analysis
surfaces, interfaces, and thin films
Texture
Theoretical
Unconventional superconductivity
ISSN:1745-2473, 1745-2481
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Popis
Shrnutí:Strong electron correlation can induce Mott insulating behaviour and produce intriguing states of matter such as unconventional superconductivity and quantum spin liquids. Recent advances in van der Waals material synthesis enable the exploration of Mott systems in the two-dimensional limit. Here we report characterization of the local electronic properties of single- and few-layer 1T-TaSe 2 via spatial- and momentum-resolved spectroscopy involving scanning tunnelling microscopy and angle-resolved photoemission. Our results indicate that electron correlation induces a robust Mott insulator state in single-layer 1T-TaSe 2 that is accompanied by unusual orbital texture. Interlayer coupling weakens the insulating phase, as shown by reduction of the energy gap and quenching of the correlation-driven orbital texture in bilayer and trilayer 1T-TaSe 2 . This establishes single-layer 1T-TaSe 2 as a useful platform for investigating strong correlation physics in two dimensions. The electrons that contribute to the Mott insulator state in single-layer 1T-TaSe2 are shown to also have a rich variation in their orbital occupation. As more layers are added, both the insulating state and orbital texture weaken.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
AC02-05CH11231; DMR-1508412; DMR-1926004; DMR-1507141; EFRI-1433307; 11227902; 2016K1A4A4A01922028; 827-000113; KQJSCX2017070727100802505; KQTD2016053112042971; EFMA-1542741; AC02-76SF00515
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Shenzhen Peacock Plan
USDOE Office of Science (SC)
National Science Foundation (NSF)
National Natural Science Foundation of China (NSFC)
Max Planc Korea
National Research Foundation (NRF), Korea
ISSN:1745-2473
1745-2481
DOI:10.1038/s41567-019-0744-9