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Direct extraction of electron parameters from magnetoconductance analysis in mesoscopic ring array structures

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/70799

Title: Direct extraction of electron parameters from magnetoconductance analysis in mesoscopic ring array structures
Authors: Sawada, A. Browse this author
Faniel, S. Browse this author
Mineshige, S. Browse this author
Kawabata, S. Browse this author
Saito, K. Browse this author
Kobayashi, K. Browse this author
Sekine, Y. Browse this author
Sugiyama, H. Browse this author
Koga, T. Browse this author →KAKEN DB
Issue Date: 8-May-2018
Publisher: American Physical Society (APS)
Journal Title: Physical Review B
Volume: 97
Issue: 19
Start Page: 195303
Publisher DOI: 10.1103/PhysRevB.97.195303
Abstract: We report an approach for examining electron properties using information about the shape and size of a nanostructure as a measurement reference. This approach quantifies the spin precession angles per unit length directly by considering the time-reversal interferences on chaotic return trajectorieswithin mesoscopic ring arrays (MRAs). Experimentally, we fabricated MRAs using nanolithography in InGaAs quantum wells which had a gate-controllable spin-orbit interaction (SOI). As a result, we observed anOnsager symmetry related to relativistic magnetic fields, which provided us with indispensable information for the semiclassical billiard ball simulation. Our simulations, developed based on the real-space formalism of the weak localization/antilocalization effect including the degree of freedom for electronic spin, reproduced the experimental magnetoconductivity (MC) curves with high fidelity. The values of five distinct electron parameters (Fermi wavelength, spin precession angles per unit length for two different SOIs, impurity scattering length, and phase coherence length) were thereby extracted from a single MC curve. The methodology developed here is applicable to wide ranges of nanomaterials and devices, providing a diagnostic tool for exotic properties of two-dimensional electron systems.
Rights: ©2018 American Physical Society
Type: article
URI: http://hdl.handle.net/2115/70799
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 古賀 貴亮

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