.png){kind=icon}
.png){kind=icon}
Return
Enhanced superconductivity and Spin-Orbit interaction in Bi2Se3-Doped FeSe1-xTex bulk single crystals
.png){kind=icon}
OA
AI
A
S
S
C
C
P
I
S
R
M
DOI：10.1016/j.rinp.2025.108553.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
We investigated the structural, superconducting, magneto-transport, and ultrafast optical properties of Bi2Se3-doped FeSe1-xTex single crystals containing 1 % (F37B1) and 4 % (F37B4) Bi2Se3. X-ray diffraction confirmed high crystallinity with c-axis-preferred orientation. The superconducting transition temperature increased from ∼ 10 K in F37B1 to ∼ 14 K in F37B4. Magneto-transport measurements revealed characteristic weak-antilocalization behavior and a clear violation of Kohler’s rule, consistent with enhanced spin–orbit scattering and multiband charge transport. X-ray photoelectron spectroscopy verified the chemical stability of Bi incorporation without secondary phases or oxidation. Magnetic hysteresis loops confirmed the presence of robust type-II superconductivity in both samples. Ultrafast optical spectroscopy revealed doping-dependent carrier relaxation: F37B1 showed faster decay components, while F37B4 exhibited slower recombination dynamics. These findings demonstrate that Bi2Se3 incorporation systematically modifies the electronic scattering environment in FeSe1-xTex. It also strengthens spin–orbit interactions. Together, these effects provide important insight into how dopants can tune the superconducting and dynamical properties of iron chalcogenides.
Keywords:
Weak antilocalization
Magnetoresistance
Ultrafast carrier dynamics
X-ray photoelectron spectroscopy
Type-II superconductor
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
4.6
Papers:
416
Citations:
2.7W
Organization
Cited Papers