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Floating of extended states in a random magnetic field with a finite mean
| Title: | Floating of extended states in a random magnetic field with a finite mean |
| Authors: | Yakubo, K.1 Browse this author →KAKEN DB |
| Authors(alt): | 矢久保, 考介1 |
| Issue Date: | 15-Dec-2000 |
| Publisher: | The American Physical Society |
| Journal Title: | PHYSICAL REVIEW B |
| Volume: | 62 |
| Issue: | 24 |
| Start Page: | 16756 |
| End Page: | 16760 |
| Publisher DOI: | 10.1103/PhysRevB.62.16756 |
| Abstract: | Effects of a uniform magnetic field on two-dimensional (2D) electrons subject to a random magnetic field (RMF) are studied by a multifractal scaling analysis. For sufficiently strong uniform field (B¯ ≫ δb), the RMF system is equivalent to a quantum Hall system (QHS), namely, the spectral density of states splits into subbands, and states only at the subband centers are extended with the localization-length exponent v=2.31±0.01, where B¯ is the averaged magnetic field and d b is the characteristic amplitude of the spatially fluctuating field. In the case of B¯≲δb , subbands overlap each other and energies of extended states shift upwards with keeping its universality class. This behavior conflicts with a recent theoretical prediction and demonstrates that 2D systems in RMF's even with small finite means are rather close to QHS's. |
| Rights: | Copyright © 2003 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/5650 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 矢久保 考介
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