Frustration and Atomic Ordering in a Monolayer Semiconductor Alloy
Abstract
Frustrated interactions can lead to short-range ordering arising from incompatible interactions of fundamental physical quantities with the underlying lattice. The simplest example is the triangular lattice of spins with antiferromagnetic interactions, where the nearest-neighbor spin-spin interactions cannot simultaneously be energy minimized. In this work, we show that engineering frustrated interactions is a possible route for controlling structural and electronic phenomena in semiconductor alloys. Using aberration-corrected scanning transmission electron microscopy in conjunction with density functional theory calculations, we demonstrate atomic ordering in a two-dimensional semiconductor alloy as a result of the competition between geometrical constraints and nearest-neighbor interactions. Statistical analyses uncover the presence of short-range ordering in the lattice. In addition, we show how the induced ordering can be used as another degree of freedom to considerably modify the band gap of monolayer semiconductor alloys.
- Authors:
-
- Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1607414
- Alternate Identifier(s):
- OSTI ID: 1603741
- Grant/Contract Number:
- AC02-05CH11231; DMR-1807233; DMR-1926004; AC02-05-CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 124; Journal Issue: 9; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; electronic structure; structural properties; 2-dimensional systems; alloys; semiconductors; transition-metal dichalcogenide; density functional theory; electron microscopy; infrared spectroscopy; condensed matter & materials physics
Citation Formats
Azizi, Amin, Dogan, Mehmet, Cain, Jeffrey D., Eskandari, Rahmatollah, Yu, Xuanze, Glazer, Emily C., Cohen, Marvin L., and Zettl, Alex. Frustration and Atomic Ordering in a Monolayer Semiconductor Alloy. United States: N. p., 2020.
Web. doi:10.1103/physrevlett.124.096101.
Azizi, Amin, Dogan, Mehmet, Cain, Jeffrey D., Eskandari, Rahmatollah, Yu, Xuanze, Glazer, Emily C., Cohen, Marvin L., & Zettl, Alex. Frustration and Atomic Ordering in a Monolayer Semiconductor Alloy. United States. https://doi.org/10.1103/physrevlett.124.096101
Azizi, Amin, Dogan, Mehmet, Cain, Jeffrey D., Eskandari, Rahmatollah, Yu, Xuanze, Glazer, Emily C., Cohen, Marvin L., and Zettl, Alex. Thu .
"Frustration and Atomic Ordering in a Monolayer Semiconductor Alloy". United States. https://doi.org/10.1103/physrevlett.124.096101. https://www.osti.gov/servlets/purl/1607414.
@article{osti_1607414,
title = {Frustration and Atomic Ordering in a Monolayer Semiconductor Alloy},
author = {Azizi, Amin and Dogan, Mehmet and Cain, Jeffrey D. and Eskandari, Rahmatollah and Yu, Xuanze and Glazer, Emily C. and Cohen, Marvin L. and Zettl, Alex},
abstractNote = {Frustrated interactions can lead to short-range ordering arising from incompatible interactions of fundamental physical quantities with the underlying lattice. The simplest example is the triangular lattice of spins with antiferromagnetic interactions, where the nearest-neighbor spin-spin interactions cannot simultaneously be energy minimized. In this work, we show that engineering frustrated interactions is a possible route for controlling structural and electronic phenomena in semiconductor alloys. Using aberration-corrected scanning transmission electron microscopy in conjunction with density functional theory calculations, we demonstrate atomic ordering in a two-dimensional semiconductor alloy as a result of the competition between geometrical constraints and nearest-neighbor interactions. Statistical analyses uncover the presence of short-range ordering in the lattice. In addition, we show how the induced ordering can be used as another degree of freedom to considerably modify the band gap of monolayer semiconductor alloys.},
doi = {10.1103/physrevlett.124.096101},
journal = {Physical Review Letters},
number = 9,
volume = 124,
place = {United States},
year = {2020},
month = {3}
}
Web of Science
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