TY - JOUR
T1 - Tunable 2D Group-III Metal Alloys
AU - Rajabpour, Siavash
AU - Vera, Alexander
AU - He, Wen
AU - Katz, Benjamin N.
AU - Koch, Roland J.
AU - Lassaunière, Margaux
AU - Chen, Xuegang
AU - Li, Cequn
AU - Nisi, Katharina
AU - El-Sherif, Hesham
AU - Wetherington, Maxwell T.
AU - Dong, Chengye
AU - Bostwick, Aaron
AU - Jozwiak, Chris
AU - van Duin, Adri C.T.
AU - Bassim, Nabil
AU - Zhu, Jun
AU - Wang, Gwo Ching
AU - Wurstbauer, Ursula
AU - Rotenberg, Eli
AU - Crespi, Vincent
AU - Quek, Su Ying
AU - Robinson, Joshua A.
N1 - Funding Information:
Funding for this work was supported by Air Force Office of Scientific Research (AFOSR) grant FA9550-19-1-0295, the National Science Foundation (NSF) under DMR-2002651 and DMR-2011839 through the Penn State MRSEC Center for Nanoscale Science, the 2D Crystal Consortium NSF Materials Innovation Platform under cooperative agreement DMR-1539916, the Singapore National Research Foundation, Prime Minister's Office, under its medium-sized center program,?the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy-EXC2089/1-390776260, the Empire State Development's Division of Science, Technology and Innovation (NYSTAR) through Focus Center-New York contract C150117, and Horiba corporation. This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under Contract No. DE-AC02-05CH11231. The electron microscopy work was funded by the US AFOSR Award FA9550-19-1-0239 and the NSERC ? Natural Sciences and Engineering Research Council of Canada Discovery Grant program. The STEM/EELS work is performed at the Canadian Centre for Electron Microscopy (CCEM), McMaster University. Optical properties computations were performed on the NUS Graphene Research Centre cluster and National Supercomputing Centre Singapore (NSCC). The authors acknowledge Jeffery Shallenberger for help with XPS analysis and Vince Bojan for AES support.
Funding Information:
Funding for this work was supported by Air Force Office of Scientific Research (AFOSR) grant FA9550‐19‐1‐0295, the National Science Foundation (NSF) under DMR‐2002651 and DMR‐2011839 through the Penn State MRSEC Center for Nanoscale Science, the 2D Crystal Consortium NSF Materials Innovation Platform under cooperative agreement DMR‐1539916, the Singapore National Research Foundation, Prime Minister's Office, under its medium‐sized center program, the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy‐EXC2089/1‐390776260, the Empire State Development's Division of Science, Technology and Innovation (NYSTAR) through Focus Center‐New York contract C150117, and Horiba corporation. This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under Contract No. DE‐AC02‐05CH11231. The electron microscopy work was funded by the US AFOSR Award FA9550‐19‐1‐0239 and the NSERC – Natural Sciences and Engineering Research Council of Canada Discovery Grant program. The STEM/EELS work is performed at the Canadian Centre for Electron Microscopy (CCEM), McMaster University. Optical properties computations were performed on the NUS Graphene Research Centre cluster and National Supercomputing Centre Singapore (NSCC). The authors acknowledge Jeffery Shallenberger for help with XPS analysis and Vince Bojan for AES support.
Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/11/2
Y1 - 2021/11/2
N2 - Chemically stable quantum-confined 2D metals are of interest in next-generation nanoscale quantum devices. Bottom-up design and synthesis of such metals could enable the creation of materials with tailored, on-demand, electronic and optical properties for applications that utilize tunable plasmonic coupling, optical nonlinearity, epsilon-near-zero behavior, or wavelength-specific light trapping. In this work, it is demonstrated that the electronic, superconducting, and optical properties of air-stable 2D metals can be controllably tuned by the formation of alloys. Environmentally robust large-area 2D-InxGa1−x alloys are synthesized byConfinement Heteroepitaxy (CHet). Near-complete solid solubility is achieved with no evidence of phase segregation, and the composition is tunable over the full range of x by changing the relative elemental composition of the precursor. The optical and electronic properties directly correlate with alloy composition, wherein the dielectric function, band structure, superconductivity, and charge transfer from the metal to graphene are all controlled by the indium/gallium ratio in the 2D metal layer.
AB - Chemically stable quantum-confined 2D metals are of interest in next-generation nanoscale quantum devices. Bottom-up design and synthesis of such metals could enable the creation of materials with tailored, on-demand, electronic and optical properties for applications that utilize tunable plasmonic coupling, optical nonlinearity, epsilon-near-zero behavior, or wavelength-specific light trapping. In this work, it is demonstrated that the electronic, superconducting, and optical properties of air-stable 2D metals can be controllably tuned by the formation of alloys. Environmentally robust large-area 2D-InxGa1−x alloys are synthesized byConfinement Heteroepitaxy (CHet). Near-complete solid solubility is achieved with no evidence of phase segregation, and the composition is tunable over the full range of x by changing the relative elemental composition of the precursor. The optical and electronic properties directly correlate with alloy composition, wherein the dielectric function, band structure, superconductivity, and charge transfer from the metal to graphene are all controlled by the indium/gallium ratio in the 2D metal layer.
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U2 - 10.1002/adma.202104265
DO - 10.1002/adma.202104265
M3 - Article
C2 - 34480500
AN - SCOPUS:85114175198
VL - 33
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 44
M1 - 2104265
ER -