CE-antiferromagnetic Electronic Structure in LaSrMnO Revealed by Micro-focused Angle-resolved Photoemission Spectroscopy and Tight-binding Models

澤田 晏伯*; 芝田 悟朗 ; 齋藤 智彦*; 他7名*

Sawata, Yasutaka*; Shibata, Goro; Saito, Tomohiko*; 7 of others*

We have investigated the electronic structure of LaSrMnO in the CE-type antiferromagnetic (CE-AFM) state below using micro-focused angle-resolved photoemission spectroscopy (-ARPES) and tight-binding models. In agreement with the tight-binding calculations, we found a dispersive intensity around the X point in the -ARPES spectra, where the A-type antiferro-magnetic (A-AFM) band structure has no bands experimentally and theoretically, demonstrating that we have successfully captured the CE-AFM band structure for the first time. Including this intensity, many observed features were explained by the CE-AFM tight-binding bands, although some of them and the overall near-Fermi level intensity mapping can be explained by the A-AFM band structure. This indicates that the CE-AFM domain size would be no larger than the beam footprint size of a scale.