电子掺杂钙钛矿铱酸盐中的费米弧与费米口袋
Fermi arcs vs. Fermi pockets in electron-doped perovskite iridates.
作者信息
He Junfeng, Hafiz H, Mion Thomas R, Hogan T, Dhital C, Chen X, Lin Qisen, Hashimoto M, Lu D H, Zhang Y, Markiewicz R S, Bansil A, Wilson S D, He Rui-Hua
机构信息
Department of Physics, Boston College, Chestnut Hill, MA 02467, USA.
Physics Department, Northeastern University, Boston, MA 02115, USA.
出版信息
Sci Rep. 2015 Feb 23;5:8533. doi: 10.1038/srep08533.
We report on an angle resolved photoemission (ARPES) study of bulk electron-doped perovskite iridate, (Sr(1-x)La(x))3Ir2O7. Fermi surface pockets are observed with a total electron count in keeping with that expected from La substitution. Depending on the energy and polarization of the incident photons, these pockets show up in the form of disconnected "Fermi arcs", reminiscent of those reported recently in surface electron-doped Sr2IrO4. Our observed spectral variation is consistent with the coexistence of an electronic supermodulation with structural distortion in the system.
我们报道了对体电子掺杂钙钛矿铱酸盐（Sr(1-x)La(x))3Ir2O7）进行的角分辨光电子能谱（ARPES）研究。观察到费米面口袋，其总电子数与La替代预期的相符。根据入射光子的能量和偏振，这些口袋以不相连的“费米弧”形式出现，这让人想起最近在表面电子掺杂的Sr2IrO4中报道的那些。我们观察到的光谱变化与系统中电子超调制与结构畸变的共存相一致。
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