Fluence-dependent femtosecond quasiparticle and Eu2+ spin relaxation dynamics in EuFe2(As,P)2

2016/07/29 by A. Pogrebna, T. Mertelj, G. Cao +4
Materials Science · Physics and Astronomy · #Condensed matter physics #Femtosecond #Ferromagnetism #Fluence #Ion #Iron-based superconductors research #Materials science #Optics #Order (exchange) #Physics #Physics of Superconductivity and Magnetism #Quasiparticle #Rare-earth and actinide compounds #Superconductivity #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.94.144519

published as Phys. Rev. B 94, 144519 (2016)

arxiv created 2016/07/29 · openalex created_date 2016/08/23 · openalex publication_date 2016/10/26 · arxiv updated 2016/11/02 · openalex updated_date 2026/08/05

Abstract

We investigated temperature- and fluence-dependent dynamics of the time-resolved optical reflectivity in undoped spin-density-wave (SDW) and doped superconducting (SC) EuFe₂(As,P)₂ with emphasis on the ordered Eu²⁺ spin temperature region. The data indicate that in EuFe₂(As,P)₂ the SDW order coexists at low temperature with the SC and Eu²⁺-ferromagnetic order. Increasing the excitation fluence leads to a slow thermal suppression of the Eu²⁺ spin order due to the crystal-lattice heating on a nanosecond time scale while the SDW order is suppressed nonthermally on a subpicosecond time scale at a higher fluence.

Citations

• Controlled Vaporization of the Superconducting Condensate in Cuprate Superconductors by Femtosecond Photoexcitation
• Electrical resistivity and specific heat of single-crystallineEuFe2As2: A magnetic homologue ofSrFe2As2
• Quasiparticle relaxation dynamics in spin-density-wave and superconductingSmFeAsO1−xFxsingle crystals
• Antiferromagnetic transition inEuFe2As2: A possible parent compound for superconductors
• In-plane electronic anisotropy in underdopedBa(Fe1−xCox)2As2revealed by partial detwinning in a magnetic field