Bosonic excitations and electron pairing in an electron-doped cuprate superconductor

被引：10

作者：

Wang, M. C. ^{[1
]}

Yu, H. S. ^{[2
,3
]}

Xiong, J. ^{[4
]}

Yang, Y-F ^{[2
,3
]}

Luo, S. N. ^{[1
]}

Jin, K. ^{[2
,3
]}

Qi, J. ^{[1
,4
]}

机构：

[1] Peac Inst Multiscale Sci, Chengdu 610031, Sichuan, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Collaborat Innovat Ctr Quantum Matter, Beijing 100190, Peoples R China

[4] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Sichuan, Peoples R China

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 15期

基金：

中国国家自然科学基金;

关键词：

TRANSITION-TEMPERATURE; STATE; FLUCTUATIONS; RELAXATION; SPECTRA;

D O I：

10.1103/PhysRevB.97.155157

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By applying ultrafast optical spectroscopy to electron-doped La1.9Ce0.1CuO4 +/-delta, we discern a bosonic mode of electronic origin and provide the evolution of its coupling with the charge carriers as a function of temperature. Our results show that it has the strongest coupling strength near T-c and can fully account for the superconducting pairing. This mode can be associated with the two-dimensional antiferromagnetic spin correlations emerging below a critical temperature T-dagger larger than T-c. Our work may help to establish a quantitative relation between bosonic excitations and superconducting pairing in electron-doped cuprates.

引用

页数：8

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