TY - JOUR

T1 - Photoemission study of weakly magnetic (formula presented)

AU - Son, J. Y.

AU - Konishi, T.

AU - Mizokawa, T.

AU - Fujimori, A.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - We have studied the electronic structure of (Formula presented) with (Formula presented), 0.12, and 0.18, which compositions cover the paramagnetic, metamagnetic, and ferromagnetic phases, by means of photoemission and inverse-photoemission spectroscopy. With Al substitution, broad peaks near the Fermi level (Formula presented) are shifted upwards and one of them crosses (Formula presented) as predicted by band-structure calculation, although the peaks are much broader than predicted by the calculation. The overall Co (Formula presented) band is narrow and has a high binding energy tail compared to the band-structure calculation, indicating significant electron correlation effects in the Co (Formula presented) band. In order to explain these observations, model self-energy corrections have been applied to the band density of states. The lower energy scale of the self-energy is found to lie in the same range as the characteristic temperature of the magnetic susceptibility.

AB - We have studied the electronic structure of (Formula presented) with (Formula presented), 0.12, and 0.18, which compositions cover the paramagnetic, metamagnetic, and ferromagnetic phases, by means of photoemission and inverse-photoemission spectroscopy. With Al substitution, broad peaks near the Fermi level (Formula presented) are shifted upwards and one of them crosses (Formula presented) as predicted by band-structure calculation, although the peaks are much broader than predicted by the calculation. The overall Co (Formula presented) band is narrow and has a high binding energy tail compared to the band-structure calculation, indicating significant electron correlation effects in the Co (Formula presented) band. In order to explain these observations, model self-energy corrections have been applied to the band density of states. The lower energy scale of the self-energy is found to lie in the same range as the characteristic temperature of the magnetic susceptibility.

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U2 - 10.1103/PhysRevB.60.538

DO - 10.1103/PhysRevB.60.538

M3 - Article

AN - SCOPUS:2442652588

VL - 60

SP - 538

EP - 542

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 1

ER -