Study on the valley polarization control in transition metal dichalcogenides

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K13337
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Applied materials
• Research Institution: Kyoto University
• Principal Investigator: Miyauchi Yuhei 京都大学, エネルギー理工学研究所, 准教授 (10451791)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 遷移金属ダイカルコゲナイド / バレートロニクス / バレー分極 / 励起子

Outline of Final Research Achievements

We explored methods for controlling exciton valley polarization in optically excited transition metal dichalcogenides. As a major achievement, we found that the valley polarization of excitons in monolayer tungsten diselenide can be tuned through modulations in carrier density, exciton linewidth, and exciton lifetimes induced by stacking on thin multilayer graphene substrate.

Free Research Field

ナノ物質科学