Optical studies of topological insulator Bi1:5 Sb0:5 Te1:8 Se1:2 using terahertz time-domain spectroscopy.

• Main Author: Tang, Chi Sin.
• Other Authors: Chia Ee Min, Elbert
• Format: Final Year Project
• Language: English
• Published: 2012
• Subjects: DRNTU::Science::Physics::Descriptive and experimental mechanics
• Online Access: http://hdl.handle.net/10356/49280
• Institution: Nanyang Technological University

Topological insulators are insulating materials with conducting surface states and insulating bulk states. Their surface states are topologically protected, meaning that unlike ordinary surface states, they cannot be destroyed by impurities and imperfections. This property is attributed to the prese...