Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor

Cong Li; Guangyang Dai; Yongqing Cai; Yang Wang; Xiancheng Wang; Qiang Gao; Guodong Liu; Yuan Huang; Qingyan Wang; Fengfeng Zhang; Shenjin Zhang; Feng Yang; Zhimin Wang; Qinjun Peng; Zuyan Xu; Changqing Jin; Lin Zhao; X. J. Zhou

doi:10.1088/1674-1056/abb21f

Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor

Cong Li, Guangyang Dai, Yongqing Cai, Yang Wang, Xiancheng Wang, Qiang Gao, Guodong Liu, Yuan Huang, Qingyan Wang, Fengfeng Zhang, Shenjin Zhang, Feng Yang, Zhimin Wang, Qinjun Peng, Zuyan Xu, Changqing Jin, Lin Zhao^*, X. J. Zhou^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Super-high resolution laser-based angle-resolved photoemission measurements are carried out on LiFeAs superconductor to investigate its electron dynamics. Three energy scales at ∼ 20 meV, ∼ 34 meV, and ∼ 55 meV are revealed for the first time in the electron self-energy both in the superconducting state and normal state. The ∼ 20 meV and ∼ 34 meV scales can be attributed to the coupling of electrons with sharp bosonic modes which are most likely phonons. These observations provide definitive evidence on the existence of mode coupling in iron-based superconductors.

Original language	English
Article number	107402
Journal	Chinese Physics B
Volume	29
Issue number	10
DOIs	https://doi.org/10.1088/1674-1056/abb21f
Publication status	Published - Oct 2020
Externally published	Yes

Keywords

Angle-resolved photoemission spectroscopy (ARPES)
Electron boson coupling
Iron-based superconductor

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10.1088/1674-1056/abb21f

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title = "Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor",

abstract = "Super-high resolution laser-based angle-resolved photoemission measurements are carried out on LiFeAs superconductor to investigate its electron dynamics. Three energy scales at ∼ 20 meV, ∼ 34 meV, and ∼ 55 meV are revealed for the first time in the electron self-energy both in the superconducting state and normal state. The ∼ 20 meV and ∼ 34 meV scales can be attributed to the coupling of electrons with sharp bosonic modes which are most likely phonons. These observations provide definitive evidence on the existence of mode coupling in iron-based superconductors.",

keywords = "Angle-resolved photoemission spectroscopy (ARPES), Electron boson coupling, Iron-based superconductor",

author = "Cong Li and Guangyang Dai and Yongqing Cai and Yang Wang and Xiancheng Wang and Qiang Gao and Guodong Liu and Yuan Huang and Qingyan Wang and Fengfeng Zhang and Shenjin Zhang and Feng Yang and Zhimin Wang and Qinjun Peng and Zuyan Xu and Changqing Jin and Lin Zhao and Zhou, {X. J.}",

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year = "2020",

month = oct,

doi = "10.1088/1674-1056/abb21f",

language = "English",

volume = "29",

journal = "Chinese Physics B",

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TY - JOUR

T1 - Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor

AU - Li, Cong

AU - Dai, Guangyang

AU - Cai, Yongqing

AU - Wang, Yang

AU - Wang, Xiancheng

AU - Gao, Qiang

AU - Liu, Guodong

AU - Huang, Yuan

AU - Wang, Qingyan

AU - Zhang, Fengfeng

AU - Zhang, Shenjin

AU - Yang, Feng

AU - Wang, Zhimin

AU - Peng, Qinjun

AU - Xu, Zuyan

AU - Jin, Changqing

AU - Zhao, Lin

AU - Zhou, X. J.

PY - 2020/10

Y1 - 2020/10

N2 - Super-high resolution laser-based angle-resolved photoemission measurements are carried out on LiFeAs superconductor to investigate its electron dynamics. Three energy scales at ∼ 20 meV, ∼ 34 meV, and ∼ 55 meV are revealed for the first time in the electron self-energy both in the superconducting state and normal state. The ∼ 20 meV and ∼ 34 meV scales can be attributed to the coupling of electrons with sharp bosonic modes which are most likely phonons. These observations provide definitive evidence on the existence of mode coupling in iron-based superconductors.

AB - Super-high resolution laser-based angle-resolved photoemission measurements are carried out on LiFeAs superconductor to investigate its electron dynamics. Three energy scales at ∼ 20 meV, ∼ 34 meV, and ∼ 55 meV are revealed for the first time in the electron self-energy both in the superconducting state and normal state. The ∼ 20 meV and ∼ 34 meV scales can be attributed to the coupling of electrons with sharp bosonic modes which are most likely phonons. These observations provide definitive evidence on the existence of mode coupling in iron-based superconductors.

KW - Angle-resolved photoemission spectroscopy (ARPES)

KW - Electron boson coupling

KW - Iron-based superconductor

UR - http://www.scopus.com/inward/record.url?scp=85092718053&partnerID=8YFLogxK

U2 - 10.1088/1674-1056/abb21f

DO - 10.1088/1674-1056/abb21f

M3 - Article

AN - SCOPUS:85092718053

SN - 1674-1056

VL - 29

JO - Chinese Physics B

JF - Chinese Physics B

IS - 10

M1 - 107402

ER -

Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor

Abstract

Keywords

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