Optical mapping of properties of two-dimensional electron system in magnetic fields

✍ Scribed by Nobuaki Hayashi; Kohei Tsumura; Shintaro Nomura; Masumi Yamaguchi; Hiroyuki Tamura; Tatsushi Akazaki; Yoshiro Hirayama

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 511 KB
• Volume: 40
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2007.09.132

✦ Synopsis

Real-space mappings of a Hall photovoltage are performed by local laser excitation using optical microscope setup with a spatial resolution of about 2 mm. The obtained images of broad and narrow strips presumably reflect the diffusion of the optically created electrons in the bulk and the edge states. The image near a current contact is considered to reflect the potential gradient near the contact.