Fine structure in high-resolution photoemission spectra of quasi-two-dimensional 1T-TaS2
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چکیده
Using high-resolution angle-resolved photoemission spectroscopy ~ARPES!, we examined the charge density wave ~CDW! compound 1T-TaS2 as a function of the photon energy ~energy range from 11 up to 33 eV! for both quasicommensurate ~QC! and commensurate ~C! CDW phases. While the QC-phase normal emission ARPES spectra coincide with previous results, normal emission spectra of the C phase reveal evidence for a fine structure in the CDW-induced features between 1 eV binding energy and the Fermi level. This fine structure may be explained by the subband manifold of the Ta 5d band, split off due to the CDW-induced A133A13 superstructure.
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تاریخ انتشار 2001