Tight-binding model to investigate reflectance reduction in correlated metals through pump-probe process: A preliminary study

Rasyid Sulaeman, Muhammad Aziz Majidi, Andrivo Rusydi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A recent experimental study of pump-probe process on material Sr1-yNbO3+δ shows an optical switching that reduces the reflectance up to nearly 100%. Here, we propose a simple model to explain that phenomenon. We hypothesize that the reflectance reduction is caused by correlation effects arising from the electron-electron scatterings accompanying the decrease in the number of electrons in conduction band as the electrons are excited to the higher band during pump-ON period. In this preliminary study, we use a one-dimensional tight-binding model, and phenomenologically add to the model an artificial self energy associated with the presence of electron-electron interactions. We use Green function method to solve our model, calculate the optical response functions, and eventually the reflectance as a function of the photon frequency. Our calculation results highlight the necessity of correlation effects to enable the reduction of reflectance at the probe photon frequency during the pump-probe process.

Original languageEnglish
Title of host publicationConference on Theoretical Physics and Nonlinear Phenomena, CTPNP 2019
Subtitle of host publicationExcursion from Vacuum to Condensed Matter
EditorsHusin Alatas, Bum-Hoon Lee, Agus Purwanto, Laksana Tri Handoko, Eny Latifah, Umar Mohideen, Andrivo Rusydi, Hari Wisodo, Markus Diantoro, Arif Hidayat, Ahmad Taufiq, Tasrief Surungan, Norhayati Ahmad, Suruati Sufian, Ardian Nata Atmaja, Imam Fachruddin, Bobby Eka Gunara, Mirza Satriawan, Albert Sulaiman
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735419933
DOIs
Publication statusPublished - 18 May 2020
Event2019 Conference on Theoretical Physics and Nonlinear Phenomena: Excursion from Vacuum to Condensed Matter, CTPNP 2019 - Malang, East Java, Indonesia
Duration: 9 Oct 201910 Oct 2019

Publication series

NameAIP Conference Proceedings
Volume2234
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2019 Conference on Theoretical Physics and Nonlinear Phenomena: Excursion from Vacuum to Condensed Matter, CTPNP 2019
CountryIndonesia
CityMalang, East Java
Period9/10/1910/10/19

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