X-ray absorption study of the electronic structure of Mn-doped amorphous Si

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The electronic structure of Mn in amorphous Si (a-Mn{sub x}Si{sub 1?x}) is studied by X-ray absorption spectroscopy at the Mn L{sub 3,2} edges for x = 0.005-0.18. Except the x = 0.005 sample, which shows a slight signature of Mn{sup 2+} atomic multiplets associated with a local Mn moment, all samples have broad and featureless L{sub 3,2} absorption peaks, corresponding to an itinerant state for all 3d electrons. The broad X-ray absorption spectra exclude the possibility of a localized 3d moment and explain the unexpectedly quenched Mn moment in this magnetically-doped amorphous semiconductor. Such a fully delocalized d state of ... continued below

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Arenholz, Elke; Zeng, Li; Huegel, A.; Helgren, E.; Hellman, F.; Piamonteze, C. et al. March 8, 2008.

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The electronic structure of Mn in amorphous Si (a-Mn{sub x}Si{sub 1?x}) is studied by X-ray absorption spectroscopy at the Mn L{sub 3,2} edges for x = 0.005-0.18. Except the x = 0.005 sample, which shows a slight signature of Mn{sup 2+} atomic multiplets associated with a local Mn moment, all samples have broad and featureless L{sub 3,2} absorption peaks, corresponding to an itinerant state for all 3d electrons. The broad X-ray absorption spectra exclude the possibility of a localized 3d moment and explain the unexpectedly quenched Mn moment in this magnetically-doped amorphous semiconductor. Such a fully delocalized d state of Mn dopant in Si has not been previously suggested.

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  • Journal Name: APPLIED PHYSICS LETTERS; Journal Volume: 92

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  • Report No.: LBNL-158E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 927152
  • Archival Resource Key: ark:/67531/metadc896327

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  • March 8, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Jan. 4, 2017, 3:55 p.m.

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Arenholz, Elke; Zeng, Li; Huegel, A.; Helgren, E.; Hellman, F.; Piamonteze, C. et al. X-ray absorption study of the electronic structure of Mn-doped amorphous Si, article, March 8, 2008; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc896327/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.