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 - 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
SN - 0935-9648
VL - 33
JO - Advanced Materials
JF - Advanced Materials
IS - 44
M1 - 2104265
ER -