利用隧道和安德列夫光谱测定 K0.8Fe1.7(Se0.72S0.28)2 的单隙超导性

IF 0.6 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Bulletin of the Lebedev Physics Institute Pub Date : 2024-09-25 DOI:10.3103/S1068335624600839

T. E. Kuzmicheva, S. A. Kuzmichev, Ye. O. Rakhmanov, I. V. Morozov

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引用次数: 0

摘要

我们首次利用平面断裂结的隧道和安德烈耶夫光谱学，研究了具有自然相分离的 K0.8Fe1.7(Se0.72S0.28)2 硒化铁单晶的超导子系统的特性。我们直接测定了其能量特征：超导阶次参数Δ(0)的大小及其特征比2Δ(0)/kBTc。所获得的临界电流 Ic(T)/Ic(0) 的温度特性可利用实验值 2Δ(0)/kBTc 用 Ambegaokar-Baratoff 公式进行拟合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Single-Gap Superconductivity of K0.8Fe1.7(Se0.72S0.28)2 Determined Using Tunneling and Andreev Spectroscopy

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Single-Gap Superconductivity of K0.8Fe1.7(Se0.72S0.28)2 Determined Using Tunneling and Andreev Spectroscopy

For the first time, using tunneling and Andreev spectroscopies of planar break-junctions, we have studied the properties of the superconducting subsystem of K_0.8Fe_1.7(Se_0.72S_0.28)₂ iron selenide single crystals with a natural phase separation. We have directly determined its energy characteristics: the magnitude of the superconducting order parameter Δ(0), and its characteristic ratio 2Δ(0)/k_BT_c. The obtained temperature behavior of the critical current I_c(T)/I_c(0) could be fitted with Ambegaokar-Baratoff formula using the experimental 2Δ(0)/k_BT_c value.

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来源期刊

Bulletin of the Lebedev Physics Institute PHYSICS, MULTIDISCIPLINARY-

CiteScore

0.70

自引率

25.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.