Photoinduced superconducting phase transition dynamics in Bi-based high-Tc superconductors

2014 Fiscal Year Final Research Report

• Project/Area Number: 24340063
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Hokkaido University
• Principal Investigator: TODA YASUNORI 北海道大学, 工学(系)研究科(研究院), 教授 (00313106)
• Co-Investigator(Kenkyū-buntansha): ODA Migaku 北海道大学, 大学院理学研究院, 教授 (70204211)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 光物性 / 光誘起相転移 / ポンププローブ分光 / 高温超伝導体 / 銅酸化物 / 擬ギャップ

Outline of Final Research Achievements

Photoinduced phase transition dynamics in the superconducting and pseudogap states of Bi-based high-Tc superconductors have been investigated using ultrashort pulses and the following conclusions are obtained: 1) existence of a spontaneous symmetry breaking in the psuedogap state, 2) distinct relationship between phase coherence and gap formation, 3) absence of long-range electronic ordering and carrier lorcalization in the pseudogap formation, 4) enhanced contribution of the pseudogap to the gap formation in the underdoped sample.

Free Research Field

光物性