Spectral Evidence for Emergent Order in Ba_{1-x}Na_{x}Fe_{2}As_{2}.
- Author(s): Yi, M
- Frano, A
- Lu, DH
- He, Y
- Wang, Meng
- Frandsen, BA
- Kemper, AF
- Yu, R
- Si, Q
- Wang, L
- He, M
- Hardy, F
- Schweiss, P
- Adelmann, P
- Wolf, T
- Hashimoto, M
- Mo, S-K
- Hussain, Z
- Le Tacon, M
- Böhmer, AE
- Lee, D-H
- Shen, Z-X
- Meingast, C
- Birgeneau, RJ
- et al.
Published Web Location
https://doi.org/10.1103/physrevlett.121.127001Abstract
We report an angle-resolved photoemission spectroscopy study of the iron-based superconductor family, Ba_{1-x}Na_{x}Fe_{2}As_{2}. This system harbors the recently discovered double-Q magnetic order appearing in a reentrant C_{4} phase deep within the underdoped regime of the phase diagram that is otherwise dominated by the coupled nematic phase and collinear antiferromagnetic order. From a detailed temperature-dependence study, we identify the electronic response to the nematic phase in an orbital-dependent band shift that strictly follows the rotational symmetry of the lattice and disappears when the system restores C_{4} symmetry in the low temperature phase. In addition, we report the observation of a distinct electronic reconstruction that cannot be explained by the known electronic orders in the system.
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