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12 Nov 2012

Volume 101, Issue 20, Articles (20xxxx)

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Appl. Phys. Lett. 101, 203102 (2012); http://dx.doi.org/10.1063/1.4747717 (4 pages)

Hyukjin Jung and Ki-Hun Jeong
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Orbital characters and near two-dimensionality of Fermi surfaces in NaFe1−xCoxAs

Z.-H. Liu, P. Richard, Y. Li, L.-L. Jia, G.-F. Chen, T.-L. Xia, D.-M. Wang, J.-B. He, H.-B. Yang, Z.-H. Pan, T. Valla, P. D. Johnson, N. Xu, H. Ding, and S.-C. Wang

Appl. Phys. Lett. 101, 202601 (2012); http://dx.doi.org/10.1063/1.4767374 (5 pages)

Online Publication Date: 13 November 2012

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We report a comprehensive study of orbital characters and tridimensional nature of the electronic bands of 111-family in Fe-pnictides superconductors, NaFe1−xCoxAs (x = 0 and 0.05), with angle-resolved photoemission spectroscopy. We determined the orbital characters and the kz dependence of the low-energy electronic structures by tuning the polarization and the energy of the incident photons. We observed two nearly two-dimensional hole-like Fermi surfaces (FS) near the Brillouin zone (BZ) center and two electron-like FS near BZ corner. The bands near the Fermi level (EF) are mainly derived from the Fe 3dxy, 3dyz, and 3dzx orbitals.
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74.25.Jb Electronic structure (photoemission, etc.)
79.60.-i Photoemission and photoelectron spectra
74.70.Xa Pnictides and chalcogenides
71.18.+y Fermi surface: calculations and measurements; effective mass, g factor
74.20.Pq Electronic structure calculations
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