Characterization of Superconducting Nbn, WSi and MoSi Ultra-Thin Films in Magnetic Field

被引：7

作者：

Bao, Han ^{[1
]}

Xu, Tao ^{[1
]}

Li, Chong ^{[1
]}

Jia, Xiaoqing ^{[1
,2
]}

Kang, Lin ^{[1
,2
]}

Wang, Zhihe ^{[3
]}

Wang, Yonglei ^{[1
]}

Tu, Xuecou ^{[1
,2
]}

Zhang, Labao ^{[1
,2
]}

Zhao, Q. Y. ^{[1
,2
]}

Jin, Biao Bing ^{[1
]}

Chen, Jian ^{[1
,2
]}

Xu, W. W. ^{[1
]}

Wu, Peiheng ^{[1
,2
]}

机构：

[1] Nanjing Univ, Sch Elect Sci & Engn, Res Inst Superconductor Elect RISE, Nanjing 210023, Peoples R China

[2] Purple Mt Labs, Nanjing 211111, Peoples R China

[3] Nanjing Univ, Sch Phys, Nanjing 210093, Peoples R China

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2021年 / 31卷 / 05期

基金：

国家重点研发计划;

关键词：

Anisotropy; superconducting single-photon detector; ultra-thin films; upper critical magnetic field; SINGLE-PHOTON DETECTORS; INFRARED PHOTONS; EFFICIENCY;

D O I：

10.1109/TASC.2021.3066881

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The system detection efficiency of superconducting nanowire single-photon detectors (SNSPD) has rapidly improved in recent years. In this study, we fabricated NbN, WSi and MoSi ultra-thin films, which are widely used for SNSPD fabrication, employing magnetron sputtering. We characterized the films in the presence of a magnetic field to study the upper critical magnetic field H-c2 and the anisotropy. According to the results obtained in our experiments, we calculated the coherence length and diffusion coefficient of these films. The knowledge of these parameters will guide the modelling and the interpretation of the different features observed in SNSPD made out of NbN, WSi and MoSi.

引用

页数：4

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