Electronic structure of the iron-based superconductor (La,Eu)FeAsO1-xFx investigated by laser photoemission spectroscopy

Walid Malaeb, Ramadan Awad, Taku Hibino, Yoichi Kamihara, Takeshi Kondo, Shik Shin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have implemented laser photoemission spectroscopy (PES) to investigate the electronic structure of the iron-based superconductor (La,Eu)FeAsO1-xFx (LaEu1111) which is an interesting compound in the “1111“ family showing a high value of the superconducting (SC) transition temperature (T c ) due to Eu doping. At least two energy scales were observed from the PES data in the SC compound: One at ~14 meV closing around T c and thus corresponding to the SC gap. Another energy scale appears at ~35 meV and survives at temperatures above T c which represents the pseudogap (PG). The non-SC sample (La,Eu)FeAsO shows a PG at ~41 meV. These observations in this new superconductor are consistent with the general trend followed by other compounds in the “1111“ family.

Original languageEnglish
JournalPhysica B: Condensed Matter
DOIs
Publication statusAccepted/In press - 2017 Jun 30

Fingerprint

Laser spectroscopy
Photoelectron spectroscopy
Electronic structure
photoelectric emission
electronic structure
iron
closing
spectroscopy
Superconducting materials
Superconducting transition temperature
lasers
transition temperature
Doping (additives)
trends
energy
Temperature
temperature
Iron-based Superconductors

Keywords

  • Eu doping
  • Iron-based superconductors
  • Laser photoemission spectroscopy
  • Pseudogap
  • Superconducting gap
  • “1111“ compounds

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Electronic structure of the iron-based superconductor (La,Eu)FeAsO1-xFx investigated by laser photoemission spectroscopy. / Malaeb, Walid; Awad, Ramadan; Hibino, Taku; Kamihara, Yoichi; Kondo, Takeshi; Shin, Shik.

In: Physica B: Condensed Matter, 30.06.2017.

Research output: Contribution to journalArticle

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AU - Awad, Ramadan

AU - Hibino, Taku

AU - Kamihara, Yoichi

AU - Kondo, Takeshi

AU - Shin, Shik

PY - 2017/6/30

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