Phase Diagram and Superconducting Dome of Infinite-Layer Nd1-xSxNiO2 Thin Films

被引：269

作者：

Zeng, Shengwei ^{[1
,2
]}

Tang, Chi Sin ^{[1
,3
,4
]}

Yin, Xinmao ^{[1
,4
]}

Li, Changjian ^{[2
,5
]}

Li, Mengsha ^{[5
]}

Huang, Zhen ^{[2
]}

Hu, Junxiong ^{[1
,2
]}

Liu, Wei ^{[1
]}

Omar, Ganesh Ji ^{[1
,2
]}

Jani, Hariom ^{[2
,3
]}

Lim, Zhi Shiuh ^{[1
,2
]}

Han, Kun ^{[2
]}

Wan, Dongyang ^{[1
,2
]}

Yang, Ping ^{[4
]}

Pennycook, Stephen John ^{[2
,5
]}

Wee, Andrew T. S. ^{[1
,3
,4
,6
]}

Ariando, Ariando ^{[1
,2
,3
,6
]}

机构：

[1] Natl Univ Singapore, Fac Sci, Dept Phys, Singapore 117551, Singapore

[2] Natl Univ Singapore, NUSNNI NanoCore, Singapore 117411, Singapore

[3] Natl Univ Singapore, NUS Grad Sch Integrat Sci & Engn, Singapore 117456, Singapore

[4] Natl Univ Singapore, Singapore Synchrotron Light Source SSLS, Singapore 117603, Singapore

[5] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore

[6] Natl Univ Singapore, Ctr Adv 2D Mat & Graphene Res, Singapore 117546, Singapore

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 14期

基金：

新加坡国家研究基金会;

关键词：

PHYSICS;

D O I：

10.1103/PhysRevLett.125.147003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Infinite-layer Nd1-xSxNiO2 thin films with Sr doping level x from 0.08 to 0.3 are synthesized and investigated. We find a superconducting dome x between 0.12 and 0.235 accompanied by a weakly insulating behavior in both under- and overdoped regimes. The dome is akin to that in the electron-doped 214-type and infinite-layer cuprate superconductors. For x >= 0.18, the normal state Hall coefficient (RH) changes the sign from negative to positive as the temperature decreases. The temperature of the sign changes decreases monotonically with decreasing x from the overdoped side and approaches the superconducting dome at the midpoint, suggesting a reconstruction of the Fermi surface with the dopant concentration across the dome.

引用

页数：7

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