Two-phase/two-gap scenario in heavily reduced superconducting ITO films revealed by point-contact spectroscopy

IF 0.6 4区物理与天体物理 Q4 PHYSICS, APPLIED

Low Temperature Physics Pub Date : 2024-08-06 DOI:10.1063/10.0027926

D. Menesenko, O. Feia, A. Shapovalov, V. Tarenkov, I. Gavrysh, E. Zhitlukhina, M. Belogolovskii, A. Parra, A. Aliev

引用次数: 0

Abstract

We present the first point-contact measurements of heavily reduced indium tin oxide (ITO) films in the superconducting state, which simultaneously demonstrate high transparency in the visible light spectrum. Analysis of the differential conductance spectrum indicates the presence of two superconducting phases, the main one with a critical temperature Tc of about 4.6 K and an additional phase with Tc ∼ 10 K, most likely localized near the surface. The phase separation is indirectly confirmed by resistance measurements of the layers and ab initio calculations of the doped ITO electronic structure. The results obtained give hope for the creation of transparent superconducting films with critical temperatures of about 10 K.

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点接触光谱学揭示重度还原超导 ITO 薄膜中的两相/两隙情况

我们首次对处于超导状态的重度还原氧化铟锡（ITO）薄膜进行了点接触测量，测量结果同时显示了其在可见光光谱下的高透明度。对微分电导谱的分析表明存在两个超导相，主要超导相的临界温度 Tc 约为 4.6 K，另一个超导相的临界温度 Tc ～ 10 K，很可能位于表面附近。层电阻测量和掺杂 ITO 电子结构的 ab initio 计算间接证实了相分离。这些结果为创造临界温度约为 10 K 的透明超导薄膜带来了希望。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Low Temperature Physics 物理-物理：应用

CiteScore

1.20

自引率

25.00%

发文量

138

审稿时长

3 months

期刊介绍： Guided by an international editorial board, Low Temperature Physics (LTP) communicates the results of important experimental and theoretical studies conducted at low temperatures. LTP offers key work in such areas as superconductivity, magnetism, lattice dynamics, quantum liquids and crystals, cryocrystals, low-dimensional and disordered systems, electronic properties of normal metals and alloys, and critical phenomena. The journal publishes original articles on new experimental and theoretical results as well as review articles, brief communications, memoirs, and biographies. Low Temperature Physics, a translation of the copyrighted Journal FIZIKA NIZKIKH TEMPERATUR, is a monthly journal containing English reports of current research in the field of the low temperature physics. The translation began with the 1975 issues. One volume is published annually beginning with the January issues.