Electric field – velocity relation for strongly coupled Fröhlich polaron in emerging 2D materials. (26th September 2022)

• Record Type: Journal Article
• Authors: Singh, Ramji; Dutta, Mitra; Stroscio, Michael A
• Is Part Of: Journal of physics communications. Volume 6:Number 9(2022)
• Publication Date: 2022-09-26
• Subjects: Fröhlich polaron -- LO phonon -- 2D material; Physics -- Periodicals; 530.05
• DOI: 10.1088/2399-6528/ac9034
• Languages: English
• ISSNs: 2399-6528

Abstract

Abstract: In this paper we evaluate the electric field—velocity relation for strong electron—LO phonon coupled 2D materials namely Hf S 2, HfS e 2, Zr S 2 and ZrS e 2 by applying Thornber—Feynman (TF) formalism applied to the case of the 2D Fröhlich polaron. We demonstrate that the generally-accepted Fermi's Golden Rule based approach breaks down for these strongly coupled materials. We predict ZrS e 2 has highest mobility of 449 c m 2 / V -s at room temperature followed by HfS e 2 with 240 c m 2 / V -s whereas other materials have below 100 c m 2 / V -s.