Kojiro Mimura

Zn, Mn and Te K-edge EXAFS studies of the diluted magnetic semiconductor

Extended x-ray absorption fine-structure measurements at the Zn, Mn and Te K edges of the diluted magnetic semiconductors have been performed to investigate the local coordination around each of the atoms. The nearest-neighbour and next-nearest-neighbour interatomic distances are found to be almost unchanged on changing the Mn concentration (x). These results indicate that the tetrahedral and clusters are embedded in the alloys with a well-preserved form, in agreement with the x-independent Mn 3d partial density of states derived from resonant photoemission measurements.

Temperature-Dependent Angle-Resolved Photoemission Spectra of TlInSe2: Manifestations of Incommensurate and Commensurate Phases

The energy band structures of the valence band of the TlInSe2 material with a quasi one-dimensional chain structure and a giant Seebeck coefficient at temperatures below 413 K were investigated by angle-resolved photoemission spectroscopy at 280 and 50 K. The obtained energy bands and the calculated band structure were found to correspond well in main futures. A detailed analysis using both experimental and theoretical data was performed and the obtained results were evident of the presence of the incommensurate phase linked to a certain point on the A line of the Brillouin zone of TlInSe2. A self-consistent picture of the phase transition in TlInSe2 was drawn after discussion using available data for this material. According to this picture, TlInSe2 at 50 K is already a commensurate material while the incommensurate-commensurate phase transition occurs between 280 and 50 K.

Temperature-dependent Eu 3 d − 4 f x-ray absorption and resonant photoemission study of the valence transition in Eu Ni 2 ( Si 0.2 Ge 0.8 ) 2

We study the mixed valence transition (

Hard X-ray Photoemission Spectroscopy of Temperature-Induced Valence Transition in EuNi2(Si0.20Ge0.80)2

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Oxygen 2p Partial Density of States and Bond Angles around O Atoms in SiO2 Glass

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Ultraviolet inverse photoemission and photoemission spectra of diluted magnetic semiconductor Zn1-xMnxTe

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Mn 3d states in diluted magnetic semiconductor Zn1−xMnxTe

80 K) in EuNi

Mn and Te K-edge EXAFS studies of Zn1−xMnxTe

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