In:
Chinese Physics Letters, IOP Publishing, Vol. 37, No. 6 ( 2020-06-01), p. 067401-
Abstract:
We use femtosecond time-resolved optical reflectivity to study the photoexcited quasiparticle (QP) dynamics in the iron-based 112 type superconducting (SC) samples Ca 0.82 La 0.18 Fe 1 – x Ni x As 2 , with x = 0 and 0.024. In the parent sample, a fast and a slow relaxation emerge at temperatures below the magnetic-structure (MS) transition T ms ≈ 50 K and the SC transition T c ≈ 33 K, respectively. The latter obviously corresponds to an SC QP dynamics, which is further confirmed in the x = 0.024 sample with T c ≈ 25 K. The former suggests that a partial of photoexcited QP relaxation through a pesudogap (PG) channel, which is absent in the doped x = 0.024 sample without the MS transition .
Type of Medium:
Online Resource
ISSN:
0256-307X
,
1741-3540
DOI:
10.1088/0256-307X/37/6/067401
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2020
detail.hit.zdb_id:
2040565-0
SSG:
6,25
Permalink