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This article is cited in 1 scientific paper (total in 1 paper)
Band structure modification due to the spin-orbit coupling in the three-orbital model for iron pnictides
Maxim M. Korshunovab, Yuliya N. Togushovaa a Siberian Federal University,
Svobodny, 79, Krasnoyarsk, 660041, Russia
b Kirensky Institute of Physics,
Federal Research Center KSC SB RAS,
Akademgorodok, Krasnoyarsk, 660036,
Russia
Abstract:
We study the effect of the spin-orbit coupling on the band structure and the Fermi surface of the three-orbital model within the two-iron Brillouin zone. Due to the presence of two irons in the crystallographically correct unit cell, the spin-orbit coupling can be divided into the intra- and intercell parts with respect to the one-iron unit cell. We show that the intercell part produces the reconstruction of the Fermi surface in the form of the pronounced splitting between the previously degenerate electron (π,π)(π,π)-pockets along the (0,π)−(π,π)(0,π)−(π,π) direction. Intracell part shifts the bands around (0,0)(0,0) point and removes degeneracy there. There are also some other band shifts but they should not affect the low-energy physics because they occur at energy scales of about 11 eV below the Fermi level.
Keywords:
Fe-based superconductors, spin-orbit coupling, band structure, Fermi surface.
Received: 19.11.2017 Received in revised form: 21.11.2017 Accepted: 20.04.2018
Citation:
Maxim M. Korshunov, Yuliya N. Togushova, “Band structure modification due to the spin-orbit coupling in the three-orbital model for iron pnictides”, J. Sib. Fed. Univ. Math. Phys., 11:4 (2018), 430–437
Linking options:
https://www.mathnet.ru/eng/jsfu686 https://www.mathnet.ru/eng/jsfu/v11/i4/p430
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