Spectroscopic Evidence for Electron-Boson Coupling in Electron-Doped Sr2IrO4

被引：15

作者：

Hu, Yong ^{[1
,2
]}

Chen, Xiang ^{[3
]}

Peng, S. -T. ^{[1
,2
]}

Lane, C. ^{[4
]}

Matzelle, M. ^{[4
]}

Sun, Z. -L. ^{[1
,2
]}

Hashimoto, M. ^{[5
,6
]}

Lu, D. -H. ^{[5
,6
]}

Schwier, E. F. ^{[7
]}

Arita, M. ^{[7
]}

Wu, T. ^{[1
,2
]}

Markiewicz, R. S. ^{[4
]}

Shimada, K. ^{[7
]}

Chen, X. -H. ^{[1
,2
]}

Shen, Z. -X. ^{[5
,6
,8
,9
]}

Bansil, A. ^{[4
]}

Wilson, S. D. ^{[3
]}

He, J. -F. ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, Dept Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, CAS Key Lab Strongly Coupled Quantum Matter Phys, Hefei 230026, Anhui, Peoples R China

[3] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[4] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

[5] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[6] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA

[7] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Hiroshima 7390046, Japan

[8] Stanford Univ, Dept Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[9] Stanford Univ, Dept Appl Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 21期

关键词：

NORMAL-STATE; FERMI ARCS; T-C; GAP; TRANSITION; DISPERSION; PSEUDOGAP; PLANE;

D O I：

10.1103/PhysRevLett.123.216402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The pseudogap, d-wave superconductivity and electron-boson coupling are three intertwined key ingredients in the phase diagram of the cuprates. Sr(2)IrO(4 )is a 5d-electron counterpart of the cuprates in which both the pseudogap and a d-wave instability have been observed. Here, we report spectroscopic evidence for the presence of the third key player in electron-doped Sr2IrO4: electron-boson coupling. A kink in nodal dispersion is observed with an energy scale of similar to 50 meV. The strength of the kink changes with doping, but the energy scale remains the same. These results provide the first noncuprate platform for exploring the relationship between the pseudogap, d-wave instability, and electron-boson coupling in doped Mott insulators.

引用

页数：7

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