Fermi-surface topology and low-lying electronic structure of the iron-based superconductor Ca10(Pt3As8)(Fe2As2)5

被引：38

作者：

Neupane, Madhab ^{[1
,2
]}

Liu, Chang ^{[1
,2
]}

Xu, Su-Yang ^{[1
,2
]}

Wang, Yung-Jui ^{[3
]}

Ni, Ni ^{[4
]}

Allred, J. M. ^{[4
]}

Wray, L. A. ^{[1
,2
,5
]}

Alidoust, N. ^{[1
,2
]}

Lin, Hsin ^{[3
]}

Markiewicz, R. S. ^{[3
]}

Bansil, A. ^{[3
]}

Cava, R. J. ^{[4
]}

Hasan, M. Z. ^{[1
,2
]}

机构：

[1] Princeton Univ, Joseph Henry Lab, Princeton, NJ 08544 USA

[2] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

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

[4] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[5] Lawrence Berkeley Natl Lab, Adv Light Source, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 09期

关键词：

RESOLVED PHOTOEMISSION-SPECTROSCOPY; AUGMENTED-WAVE METHOD; INSULATOR; SYSTEM; PHASE; GAPS;

D O I：

10.1103/PhysRevB.85.094510

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a study of low-energy electronic structure and Fermi surface topology for the recently discovered iron-based superconductor Ca-10(Pt3As8)(Fe2As2)(5) (the 10-3-8 phase, with T-c similar to 8 K), via angle-resolved photoemission spectroscopy (ARPES). Despite its triclinic crystal structure, ARPES results reveal a fourfold symmetric band structure with the absence of Dirac-cone-like Fermi dots (related to magnetism) found around the Brillouin zone corners in other iron-based superconductors. Considering that the triclinic lattice and structural supercell arise from the Pt3As8 intermediary layers, these results indicate that those layers couple only weakly to the FeAs layers in this new superconductor at least near the surface, which has implications for the determination of its pairing mechanism.

引用

页数：6

共 45 条

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