Tunable 2D Group‐III Metal Alloys
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 04, 2021
- Source ID
- 10.1002/adma.202104265
Entities
People
- Aaron Bostwick
- Adri. C. T. Van Duin
- Alexander Vera
- Benjamin N. Katz
- Cequn Li
- Chengye Dong
- Chris Jozwiak
- Eli Rotenberg
- Gwo‐ching Wang
- Hesham El‐sherif
- Joshua A. Robinson
- Jun Zhu
- Katharina Nisi
- Margaux Lassaunière
- Maxwell T. Wetherington
- Nabil Bassim
- Roland J. Koch
- Siavash Rajabpour
- Su Ying Quek
- Ursula Wurstbauer
- Vincent H. Crespi
- Wen He
- Xuegang Chen
Organizations
- Air Force Office of Scientific Research
- Centre for Advanced 2D Materials
- German Research Foundation
- Lawrence Berkeley National Laboratory
- McMaster University
- Natural Sciences and Engineering Research Council
- Pennsylvania State University
- Rensselaer Polytechnic Institute
- Technical University of Munich
- University of Münster