Study of spin-lattice interaction in cuprate superconductors using multiple quantum beam techniques

2015 Fiscal Year Final Research Report

• Project/Area Number: 25390132
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: WAKIMOTO Shuichi 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, リーダー (40399415)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 高温超伝導 / 中性子線 / 放射光X線

Outline of Final Research Achievements

We performed neutron and synchrotron X-ray scattering study of high-Tc cuprate supeconductors to see entire magnetic escitations. The results shows that the magnetic excitation can be described by two components: one is high-energy dispersing excitation which reflects local interaction between spins, and the other is the low-energy compoment which reflects the itinerant character of the system. Detailed neutron scattering study of low energy magnetic component and the lattice dynamics, we found that the magnetic excitation strongly enhances at the energy where a certain phonon branch crosses, indicating a possible spin-lattice coupling. These results are important regarding the contribution of magnetic excitation to the superconductivity.

Free Research Field

固体物性