Fluctuation-induced magnetoconductivity in pristine and proton-irradiated Ca8.5La1.5(Pt3As8)(Fe2As2)5 single crystals

D. Ahmad; Y. I. Seo; W. J. Choi; Yong Seung Kwon

doi:10.1088/1361-6668/30/2/025009

Fluctuation-induced magnetoconductivity in pristine and proton-irradiated Ca_8.5La_1.5(Pt₃As₈)(Fe₂As₂)₅ single crystals

D. Ahmad, Y. I. Seo, W. J. Choi, Yong Seung Kwon

Department of Physics and Chemistry

Daegu Gyeongbuk Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The influence of the proton irradiation on the fluctuation-induced conductivity in Ca_8.5La_1.5(Pt₃As₈)(Fe₂As₂)₅ single crystal was investigated. The in-plane magnetoconductivity was measured up to μ ₀ H = 13 T. It is observed that the T _c was suppressed up to 30.3 K from 32.5 K as a result of proton irradiation whereas the amplitude of the superconducting fluctuations is almost the same in both pristine and irradiated samples. The magnetoconductivity results analyzed by the Ullah and Dorsey scaling approaches showed that in the pristine sample, the 3D-2D crossover is situated near the T _c. Furthermore, once the 3D-2D crossover occurs, it is found that there is a regime simultaneously described by 2D and 3D fluctuation behaviors in our Ca_8.5La_1.5(Pt₃As₈)(Fe₂As₂)₅ sample. Meanwhile, the proton-irradiated sample showed the 3D fluctuation behavior.

Original language	English
Article number	025009
Journal	Superconductor Science and Technology
Volume	30
Issue number	2
DOIs	https://doi.org/10.1088/1361-6668/30/2/025009
State	Published - Feb 2017

Bibliographical note

Publisher Copyright:
© 2016 IOP Publishing Ltd.

Keywords

3D2D crossover in fluctuation, proton irradiation
CaLa(PtAs)(FeAs)
superconducting fluctuation

Access to Document

10.1088/1361-6668/30/2/025009

Cite this

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title = "Fluctuation-induced magnetoconductivity in pristine and proton-irradiated Ca8.5La1.5(Pt3As8)(Fe2As2)5 single crystals",

abstract = "The influence of the proton irradiation on the fluctuation-induced conductivity in Ca8.5La1.5(Pt3As8)(Fe2As2)5 single crystal was investigated. The in-plane magnetoconductivity was measured up to μ 0 H = 13 T. It is observed that the T c was suppressed up to 30.3 K from 32.5 K as a result of proton irradiation whereas the amplitude of the superconducting fluctuations is almost the same in both pristine and irradiated samples. The magnetoconductivity results analyzed by the Ullah and Dorsey scaling approaches showed that in the pristine sample, the 3D-2D crossover is situated near the T c. Furthermore, once the 3D-2D crossover occurs, it is found that there is a regime simultaneously described by 2D and 3D fluctuation behaviors in our Ca8.5La1.5(Pt3As8)(Fe2As2)5 sample. Meanwhile, the proton-irradiated sample showed the 3D fluctuation behavior.",

keywords = "3D2D crossover in fluctuation, proton irradiation, CaLa(PtAs)(FeAs), superconducting fluctuation",

author = "D. Ahmad and Seo, {Y. I.} and Choi, {W. J.} and Kwon, {Yong Seung}",

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AU - Ahmad, D.

AU - Seo, Y. I.

AU - Choi, W. J.

AU - Kwon, Yong Seung

PY - 2017/2

Y1 - 2017/2

N2 - The influence of the proton irradiation on the fluctuation-induced conductivity in Ca8.5La1.5(Pt3As8)(Fe2As2)5 single crystal was investigated. The in-plane magnetoconductivity was measured up to μ 0 H = 13 T. It is observed that the T c was suppressed up to 30.3 K from 32.5 K as a result of proton irradiation whereas the amplitude of the superconducting fluctuations is almost the same in both pristine and irradiated samples. The magnetoconductivity results analyzed by the Ullah and Dorsey scaling approaches showed that in the pristine sample, the 3D-2D crossover is situated near the T c. Furthermore, once the 3D-2D crossover occurs, it is found that there is a regime simultaneously described by 2D and 3D fluctuation behaviors in our Ca8.5La1.5(Pt3As8)(Fe2As2)5 sample. Meanwhile, the proton-irradiated sample showed the 3D fluctuation behavior.

AB - The influence of the proton irradiation on the fluctuation-induced conductivity in Ca8.5La1.5(Pt3As8)(Fe2As2)5 single crystal was investigated. The in-plane magnetoconductivity was measured up to μ 0 H = 13 T. It is observed that the T c was suppressed up to 30.3 K from 32.5 K as a result of proton irradiation whereas the amplitude of the superconducting fluctuations is almost the same in both pristine and irradiated samples. The magnetoconductivity results analyzed by the Ullah and Dorsey scaling approaches showed that in the pristine sample, the 3D-2D crossover is situated near the T c. Furthermore, once the 3D-2D crossover occurs, it is found that there is a regime simultaneously described by 2D and 3D fluctuation behaviors in our Ca8.5La1.5(Pt3As8)(Fe2As2)5 sample. Meanwhile, the proton-irradiated sample showed the 3D fluctuation behavior.

KW - 3D2D crossover in fluctuation, proton irradiation

KW - CaLa(PtAs)(FeAs)

KW - superconducting fluctuation

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