Research of Chirality Imaging using Soft X-ray Resonant Diffraction

2016 Fiscal Year Final Research Report

• Project/Area Number: 25247054
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Tanaka Yoshikazu 国立研究開発法人理化学研究所, 放射光科学総合研究センター, 専任研究員 (90250109)
• Co-Investigator(Renkei-kenkyūsha): Kimura Tsuyoshi 大阪大学, 基礎工学研究科, 教授 (80323525) ; Ohura Masaki 国立研究開発法人理化学研究所, 放射光科学総合研究センター, ユニットリーダー (50250113) ; Chainani Ashishi 国立研究開発法人理化学研究所, 放射光科学総合研究センター, 専任研究員 (80425636) ; Taguchi Munetaka 奈良先端科学技術大学院大学, 物質創成科学研究科, 特任助教 (10415218)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: X線・粒子線 / 放射光 / 共鳴X線回折 / 強相関電子系

Outline of Final Research Achievements

Resonant x-ray diffraction provides us with a powerful tool to observe the orders of spin, orbital, charge in the strongly correlated electron system. The soft x-rays in a range from 500 eV to 1500 eV covers the L2,3 absorption edges of the 3d transition metals as well as the M5 absorption edges of 4f rare-earth metals. Thee resonant transition of these edges enables us to study the 3d or the 4f electronic states directly. We have been studying the spin and orbital states in the strongly correlated electron system. Especially, we used circularly polarized x-ray beam, which reveals the chirality of the spin and orbital orders . In this project, we have developed the focusing system with a fresnel zone plate. This system gives us an extremely focused beam of which size is about 200 nm in diameter. We will proceed the study of observation and control of spin and orbital chiral domains with external fields.

Free Research Field

物質科学