Experimental energy-band dispersions and exchange splitting for Ni

Effects of spin-dependent quasiparticle renormalization in Fe, Co, and Ni photoemission spectra:An experimental and theoretical study

“…As discussed above, LSDA calculations for fcc Ni cannot reproduce various features of the electronic structure of Ni which had been observed experimentally. Besides the fact that valence band photoemission spectra of Ni [21][22][23] show a reduced 3d-band width compared to LSDA calculations 88 the spectra show a dispersionless feature at a BE of about 6 eV, the so-called 6-eV satellite, 77,78,[89][90][91][92] which is not reproducible within the LSDA approach. On the other hand, an improved description of correlation effects for the 3d electrons using many-body techniques 19,85,86 or in a more modern view applying the LSDA + DMFT scheme 24,60,93 results more or less in the experimental width of the 3d-band complex and furthermore is able to reproduce the 6-eV satellite structure in the valence band region.…”

“…8,12 In contrast, for Ni, band structure calculations could not describe the photoemission satellite at 6-eV BE and, in addition, compared to the LSDA band structure calculations of the 3d bands, a substantial (highenergy) mass-enhancement factor between 1.3 and 1.5 was obtained. [21][22][23][24][25][26] More recent (S)ARPES studies revealed also for Fe and Co considerable many-body effects. For Fe at high binding energies mass renormalizations up to a factor of 1.3 have been detected.…”

Scanning tunneling spectroscopy of Ni/W(110): bcc and fcc properties in the second atomic layer

“…25. This band structuture is further validated by photoemmission studies 27 and other calculations 28 . The tunneling current is predominantly due to states at the center of the surface Brillouin zone (Γ).…”

Spin-Resolved Photoemission Spectroscopy

“…The Σ1 T and Σ1 I bands are discernible as broad features which manifest band dispersion around 6 eV (not shown here). The observed binding energies of majority and minority spin bands are smaller than those calculated on the basis of the one electron approximation, which has been compared with the spin integrated spectra [9,10].…”

“…According to the recent calculation based on an itinerant electron model [10], the self-energy correction was found to narrow the band width and the exchange splitting as compared with their values calculated within one electron approximation. It was expected that the width of the majority spin band is smaller than the minority spin band due to stronger electron correlation.…”