Commensurability oscillations by runaway and pinned electrons

✍ Scribed by K. Tsukagoshi; T. Nagao; M. Haraguchi; S. Takaoka; K. Murase; K. Gamo

• Book ID: 102616109
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 96 KB
• Volume: 23
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1996.0349

✦ Synopsis

We report on an investigation of commensurability oscillations in antidot square-lattices, and show that the commensurate peaks in resistivity ρ xx derive from two kinds of electron: runaway and quasipinned electrons. The runaway electrons, which skip away along the antidot arrays, increase the value of conductivity σ xx ; and the quasipinned electrons, which orbit some antidots for a long time, decrease the value of σ xx . Therefore, by competition between the two different types of electron, the conductivity σ xx is determined. The conductivity σ yx in the antidot lattice always has dips at the peaks in ρ xx . As a result, by combining the of values of σ xx and σ yx , the resistivity is determined through the orthodox relation of ρ xx = σ xx /(σ 2 xx + σ 2 yx ).