Angle-resolved photoemission from Cr(110): Observation of a bulk magnetic phase transition
1988; American Physical Society; Volume: 38; Issue: 2 Linguagem: Inglês
10.1103/physrevb.38.1131
ISSN1095-3795
AutoresY. Sakisaka, Tadahiro Komeda, M. Onchi, Hidemi Kato, S. Suzuki, K. Edamoto, Y. Aiura,
Tópico(s)Iron-based superconductors research
ResumoNormal-emission photoelectron spectra were recorded from Cr(110) at 80 K (below the N\'eel temperature of ${T}_{N}$=312 K) with photon energies from 20 to 120 eV. Assuming a free-electron final band, bulk energy-band dispersions along the [110] (\ensuremath{\Gamma}M) direction normal to the surface are determined. The results are compared with previously calculated band structures for the antiferromagnetic phase. Contrary to earlier claims, we find no evidence for a valence-band satellite in Cr. Temperature-dependent studies were also presented that reveal the disappearance of an emission from the ${\ensuremath{\Sigma}}_{3}$ initial-state band (corresponding to the ${G}_{3}$ band in the paramagnetic phase) at temperatures above ${T}_{N}$ for a specific k region. This result is discussed in terms of the bulk magnetic phase transition.
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