Transition metal dichalcogenide monolayers in an ultrashort optical pulse: Femtosecond currents and anisotropic electron dynamics
Abstract
We theoretically study the interaction of an ultrafast intense linearly polarized optical pulse with monolayers of transition metal dichalcogenides (TMDCs). Such a strong pulse redistributes electrons between the bands and generates femtosecond currents during the pulse. Due to the large bandwidth of the incident pulse, this process is completely an off-resonant. While in TMDCs, the time-reversal symmetry is conserved, the inversion symmetry is broken, and these monolayers have axial symmetry along the armchair direction but not along with the zigzag one. The pulse, polarized along with asymmetric directions of TMDC monolayer, generates both longitudinal, i.e., along the direction of polarization, and transverse, i.e., in the perpendicular direction, currents. Such currents result in charge transfer through the system. Finally, we study different TMDC materials and show how the femtosecond transport in TMDC monolayers depend on their parameters, such as lattice constant and bandgap.
- Authors:
-
- Georgia State Univ., Atlanta, GA (United States)
- Publication Date:
- Research Org.:
- Georgia State Univ., Atlanta, GA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- OSTI Identifier:
- 1849374
- Grant/Contract Number:
- FG02-01ER15213; SC0007043
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 103; Journal Issue: 15; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; materials science; physics; light-matter interaction; strong electromagnetic field effects; ultrafast phenomena; monolayer films; transition metal dichalcogenides
Citation Formats
Oliaei Motlagh, S. Azar, Apalkov, Vadym, and Stockman, Mark I. Transition metal dichalcogenide monolayers in an ultrashort optical pulse: Femtosecond currents and anisotropic electron dynamics. United States: N. p., 2021.
Web. doi:10.1103/physrevb.103.155416.
Oliaei Motlagh, S. Azar, Apalkov, Vadym, & Stockman, Mark I. Transition metal dichalcogenide monolayers in an ultrashort optical pulse: Femtosecond currents and anisotropic electron dynamics. United States. https://doi.org/10.1103/physrevb.103.155416
Oliaei Motlagh, S. Azar, Apalkov, Vadym, and Stockman, Mark I. Fri .
"Transition metal dichalcogenide monolayers in an ultrashort optical pulse: Femtosecond currents and anisotropic electron dynamics". United States. https://doi.org/10.1103/physrevb.103.155416. https://www.osti.gov/servlets/purl/1849374.
@article{osti_1849374,
title = {Transition metal dichalcogenide monolayers in an ultrashort optical pulse: Femtosecond currents and anisotropic electron dynamics},
author = {Oliaei Motlagh, S. Azar and Apalkov, Vadym and Stockman, Mark I.},
abstractNote = {We theoretically study the interaction of an ultrafast intense linearly polarized optical pulse with monolayers of transition metal dichalcogenides (TMDCs). Such a strong pulse redistributes electrons between the bands and generates femtosecond currents during the pulse. Due to the large bandwidth of the incident pulse, this process is completely an off-resonant. While in TMDCs, the time-reversal symmetry is conserved, the inversion symmetry is broken, and these monolayers have axial symmetry along the armchair direction but not along with the zigzag one. The pulse, polarized along with asymmetric directions of TMDC monolayer, generates both longitudinal, i.e., along the direction of polarization, and transverse, i.e., in the perpendicular direction, currents. Such currents result in charge transfer through the system. Finally, we study different TMDC materials and show how the femtosecond transport in TMDC monolayers depend on their parameters, such as lattice constant and bandgap.},
doi = {10.1103/physrevb.103.155416},
journal = {Physical Review. B},
number = 15,
volume = 103,
place = {United States},
year = {Fri Apr 16 00:00:00 EDT 2021},
month = {Fri Apr 16 00:00:00 EDT 2021}
}
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