Low energy electronic structures in electron-doped and hole-doped superconducting (Ba/K)(Fe/Co) 2As 2

D. Qian; Y. Xia; L. Wray; D. Hsieh; M. Z. Hasan

doi:10.1007/s10948-009-0609-z

Low energy electronic structures in electron-doped and hole-doped superconducting (Ba/K)(Fe/Co) ₂As ₂

D. Qian, Y. Xia, L. Wray, D. Hsieh, M. Z. Hasan

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

Abstract

Systematic high resolution angle-resolved photoemission spectroscopic studies have been performed on the optimally electron-doped BaFe _1.82Co _0.18As ₂ (T _c = 24 K) and hole-doped Ba _0.6K _0.4Fe ₂As ₂ (T _c = 37 K) superconductors. The superconducting gap is nearly isotropic in momentum space. Utilizing different experimental geometries, the detailed electronic band structures were determined experimentally and compared with first principle LDA calculations. The overall bandwidth is reduced by a factor of 2. However, the low energy quasiparticle dispersions near zone corner exhibit stronger renormalization by a factor of 4-5. k _z dependence was observed on the electron pockets at zone corner.

Original language	English (US)
Pages (from-to)	617-619
Number of pages	3
Journal	Journal of Superconductivity and Novel Magnetism
Volume	23
Issue number	5
DOIs	https://doi.org/10.1007/s10948-009-0609-z
State	Published - Jul 2010

Keywords

Electronic structures
Pnictide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1007/s10948-009-0609-z

Cite this

@article{3231549a44fe4950a04f05e7fd82020c,

title = "Low energy electronic structures in electron-doped and hole-doped superconducting (Ba/K)(Fe/Co) 2As 2 ",

abstract = "Systematic high resolution angle-resolved photoemission spectroscopic studies have been performed on the optimally electron-doped BaFe 1.82Co 0.18As 2 (T c = 24 K) and hole-doped Ba 0.6K 0.4Fe 2As 2 (T c = 37 K) superconductors. The superconducting gap is nearly isotropic in momentum space. Utilizing different experimental geometries, the detailed electronic band structures were determined experimentally and compared with first principle LDA calculations. The overall bandwidth is reduced by a factor of 2. However, the low energy quasiparticle dispersions near zone corner exhibit stronger renormalization by a factor of 4-5. k z dependence was observed on the electron pockets at zone corner.",

keywords = "Electronic structures, Pnictide",

author = "D. Qian and Y. Xia and L. Wray and D. Hsieh and Hasan, {M. Z.}",

note = "Funding Information: Acknowledgements This work is supported by China NSF Grant No. 10874116, Shanghai Grant No. 09JC1407500 and No. 10QA1403300, DOE Grant No. DEFG-02–05ER46200, and NSF Grant No. DMR-0213706. The use of ALS at LBNL is supported by the US DOE.",

year = "2010",

month = jul,

doi = "10.1007/s10948-009-0609-z",

language = "English (US)",

volume = "23",

pages = "617--619",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

publisher = "Springer New York",

number = "5",

}

TY - JOUR

T1 - Low energy electronic structures in electron-doped and hole-doped superconducting (Ba/K)(Fe/Co) 2As 2

AU - Qian, D.

AU - Xia, Y.

AU - Wray, L.

AU - Hsieh, D.

AU - Hasan, M. Z.

N1 - Funding Information: Acknowledgements This work is supported by China NSF Grant No. 10874116, Shanghai Grant No. 09JC1407500 and No. 10QA1403300, DOE Grant No. DEFG-02–05ER46200, and NSF Grant No. DMR-0213706. The use of ALS at LBNL is supported by the US DOE.

PY - 2010/7

Y1 - 2010/7

N2 - Systematic high resolution angle-resolved photoemission spectroscopic studies have been performed on the optimally electron-doped BaFe 1.82Co 0.18As 2 (T c = 24 K) and hole-doped Ba 0.6K 0.4Fe 2As 2 (T c = 37 K) superconductors. The superconducting gap is nearly isotropic in momentum space. Utilizing different experimental geometries, the detailed electronic band structures were determined experimentally and compared with first principle LDA calculations. The overall bandwidth is reduced by a factor of 2. However, the low energy quasiparticle dispersions near zone corner exhibit stronger renormalization by a factor of 4-5. k z dependence was observed on the electron pockets at zone corner.

AB - Systematic high resolution angle-resolved photoemission spectroscopic studies have been performed on the optimally electron-doped BaFe 1.82Co 0.18As 2 (T c = 24 K) and hole-doped Ba 0.6K 0.4Fe 2As 2 (T c = 37 K) superconductors. The superconducting gap is nearly isotropic in momentum space. Utilizing different experimental geometries, the detailed electronic band structures were determined experimentally and compared with first principle LDA calculations. The overall bandwidth is reduced by a factor of 2. However, the low energy quasiparticle dispersions near zone corner exhibit stronger renormalization by a factor of 4-5. k z dependence was observed on the electron pockets at zone corner.

KW - Electronic structures

KW - Pnictide

UR - http://www.scopus.com/inward/record.url?scp=77954814047&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954814047&partnerID=8YFLogxK

U2 - 10.1007/s10948-009-0609-z

DO - 10.1007/s10948-009-0609-z

M3 - Article

AN - SCOPUS:77954814047

SN - 1557-1939

VL - 23

SP - 617

EP - 619

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 5

ER -