Work

Effects of strain-induced pseudogauge fields on exciton dispersion, transport, and interactions in transition metal dichalcogenide nanoribbons

Year: 2025

Type: article

Abstract: We study the effects of strain on exciton dynamics in transition metal dichalcogenide (TMD) nanoribbons. Using the Bethe--Salpeter formalism, we derive the exciton dispersion relation in strained TMDs and demonstrate that strain-induced pseudogauge fields significantly influence exciton transport and interactions. Our results show that low-energy excitons occur at finite center-of-mass momentum, leading to modified diffusion properties. Furthermore, the exciton dipole moment depends on center-of-mass momentum, which enhances exciton-exciton interactions. These findings highlight the potential of strain engineering as a powerful tool for controlling exciton transport and interactions in nanoribbon-based TMD optoelectronic and quantum devices.

Source: Physical review. B./Physical review. B

DOI: 10.1103/5sk7-6knf

Authors: Shiva Heidari, Shervin Parsi, Pouyan Ghaemi

Institutions: City College of New York, The Graduate Center, CUNY, City University of New York

Language: English

Topic: 2D Materials and Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Kavli Institute for Theoretical Physics, University of California, Santa Barbara

Awards: Strain engineering of exciton-polaritons in 2D Semiconductors, Collaborative Research: Fractional quantum Hall effect on noisy quantum computers, Kavli Institute for Theoretical Physics