Angle-resolved photoemission spectroscopy study of PrFeAsO0.7: Comparison with LaFePO

被引：22

作者：

Nishi, I. ^{[1
,2
]}

Ishikado, M. ^{[3
,4
,5
]}

Ideta, S. ^{[1
,2
]}

Malaeb, W. ^{[1
,2
]}

Yoshida, T. ^{[1
,2
,5
]}

Fujimori, A. ^{[1
,2
,5
]}

Kotani, Y. ^{[6
]}

Kubota, M. ^{[6
]}

Ono, K. ^{[6
]}

Yi, M. ^{[7
,8
]}

Lu, D. H. ^{[7
,8
]}

Moore, R. ^{[7
,8
]}

Shen, Z. -X. ^{[7
,8
]}

Iyo, A. ^{[4
,5
]}

Kihou, K. ^{[4
,5
]}

Kito, H. ^{[4
,5
]}

Eisaki, H. ^{[4
,5
]}

Shamoto, S. ^{[3
,5
]}

Arita, R. ^{[5
,9
,10
]}

机构：

[1] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[2] Univ Tokyo, Dept Complex Sci & Engn, Tokyo 1130033, Japan

[3] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan

[4] Natl Inst Adv Ind Sci & Technol, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan

[5] JST, TRIP, Chiyoda Ku, Tokyo 1020075, Japan

[6] High Energy Accelerator Res Org KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[7] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[8] Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA

[9] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[10] JST, CREST, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 01期

关键词：

ELECTRONIC-STRUCTURE; LAYERED SUPERCONDUCTOR; SURFACE;

D O I：

10.1103/PhysRevB.84.014504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have performed an angle-resolved photoemission spectroscopy (ARPES) study of the iron-based superconductor PrFeAsO0.7 and examined the Fermi surfaces and band dispersions near the Fermi level. Heavily hole-doped electronic states have been observed due to the polar nature of the cleaved surfaces. Nevertheless, we have found that the ARPES spectra basically agree with band dispersions calculated in the local density approximation (LDA) if the bandwidth is reduced by a factor of similar to 2.5 and then the chemical potential is lowered by similar to 70 meV. Comparison with previous ARPES results on LaFePO reveals that the energy positions of the d(3z2-r2)- and d(yz,zx)-derived bands are considerably different between the two materials, which we attribute to the different pnictogen height as predicted by the LDA calculation.

引用

页数：5

共 34 条

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