Quasi-particle band gap and excitonic effects in 1-Dimensional (1D) Selenium and Tellurium nano-wires*

1-Dimensional(1D) vdW’s structures represent an exotic class of materials for opto-electronic applications due to high excitonic binding energy arising from reduced screening and quantum confinement effects. Theoretical investigation is crucial to guide incipient experimental efforts[1]. Many-body interactions have a prominent effect on the electronic and optical properties of reduced-dimensional systems, and we will report the electronic & optical properties of selenium and tellurium atomic chains with quasi-particle self-energy corrections within the GW approximation[2], on structures obtained without and with van der Waals corrections here.

References:
¹Hugh OH Churchill, Gregory J Salamo, Shui-Qing Yu, Takayuki Hironaka, Xian Hu, Jeb Stacy, Ishiang Shih, “Toward Single Atom Chains with Exfoliated Tellurium,”Nanoscale Res. Lett.,12,488.

² Eesha Andharia, Thaneshwor P. Kaloni, Gregory J. Salamo, Shui-Qing Yu, Hugh O. H. Churchill, Salvador Barraza-Lopez, “Quasi-particle bandgap and excitonic properties of selenium atomic chains”,(2017), arXiv:1709.04575v1.