Dynamics of lattice distortion in photoinduced phase transitions

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400324
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: National Institute for Materials Science
• Principal Investigator: Nishino Masamichi 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主幹研究員 (80391217)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 電子格子相互作用 / 相転移 / 臨界現象 / フラストレーション / 光誘起相転移 / 長距離相互作用 / 弾性相互作用 / 準安定状態 / 緩和過程

Outline of Final Research Achievements

It is important to clarify the cooperative effect by the elastic interaction induced by lattice distortion for the mechanism of phase transitions by light irradiation, temperature change, pressure change, etc. in spin-crossover (SC) materials. We showed theoretically that new critical phenomena and new phases can exist in two-dimensional SC systems. We also showed the mechanism which brings divergence-like enhancement by a finite-size effect in a system with a kind of long-range interactions, related to SC systems. We developed a computational method to study the growth of the high spin state after photo-irradiation.

Free Research Field

物性理論、統計力学