Metallic Behavior of Cyclotron Relaxation Time in Two-Dimensional Systems

Ryuichi Masutomi, Kohei Sasaki, Ippei Yasuda, Akihito Sekine, Kentarou Sawano, Yasuhiro Shiraki, and Tohru Okamoto
Phys. Rev. Lett. 106, 196404 – Published 11 May 2011

Abstract

Cyclotron resonance of two-dimensional electrons is studied at low temperatures down to 0.4 K for a high-mobility Si/SiGe quantum well which exhibits a metallic temperature dependence of dc resistivity ρ. The relaxation time τCR shows a negative temperature dependence, which is similar to that of the transport scattering time τt obtained from ρ. The ratio τCR/τt at 0.4 K increases as the electron density Ns decreases, and exceeds unity when Ns approaches the critical density for the metal-insulator transition.

  • Figure
  • Figure
  • Figure
  • Received 14 February 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.196404

© 2011 American Physical Society

Authors & Affiliations

Ryuichi Masutomi1, Kohei Sasaki1, Ippei Yasuda1, Akihito Sekine1, Kentarou Sawano2, Yasuhiro Shiraki2, and Tohru Okamoto1

  • 1Department of Physics, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
  • 2Research Center for Silicon Nano-Science, Advanced Research Laboratories, Tokyo City University, 8-15-1 Todoroki, Setagaya-ku, Tokyo 158-0082, Japan

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 106, Iss. 19 — 13 May 2011

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×