Phase Diagram of Pressure-Induced High Temperature Superconductor La3Ni2O7+δ

被引：1

作者：

Ueki, Yuta ^{[1
,2
]}

Sakurai, Hiroya ^{[1
]}

Nagata, Hibiki ^{[1
,2
]}

Yamane, Kazuki ^{[1
,2
]}

Matsumoto, Ryo ^{[1
]}

Terashima, Kensei ^{[1
]}

Hirose, Keisuke ^{[3
]}

Ohta, Hiroto ^{[3
]}

Kato, Masaki ^{[3
]}

Takano, Yoshihiko ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci NIMS, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tsukuba, Tsukuba, Ibaraki 3058577, Japan

[3] Doshisha Univ, Kyotanabe, Kyoto 6100321, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2025年 / 94卷 / 01期

关键词：

LA3NI2O7-DELTA; TRANSPORT; ELECTRON;

D O I：

10.7566/JPSJ.94.013703

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We successfully synthesized samples of La3Ni2O7+S (S = - 0.50, - 0.16, 0.00, +0.01, and +0.12) and measured the resistance under extremely high pressures using a diamond anvil cell to establish the electronic phase diagram. A Mott insulating state appears at S = - 0.50, where all Ni ions are divalent. With increasing oxygen content, superconductivity appears at S = 0.00 and higher, above approximately 25 GPa, passing through Anderson localization at S = - 0.16. The superconducting transition temperature (Tc) decreases with increasing pressures for both S = 0.00 and +0.12, with the pressure dependence of T c being much stronger in the latter than in the former.

引用

页数：5

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