Selective synthesis of higher manganese silicides: a new Mn17Si30 phase, its electronic, transport, and optical properties in comparison with Mn4Si7

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1007/s10853-018-2105-y

Аннотация: The electronic structure, transport and optical properties of thin films of Mn4Si7 and Mn17Si30 higher manganese silicides (HMS) with the Nowotny "chimney-ladder" crystal structure are investigated using different experimental techniques and density functional theory calculations. Formation of new Mn17Si30 compound through selective solid-state reaction synthesis proposed and its crystal structure is reported for the first time, the latter belonging to I-42d. Absorption measurements show that both materials demonstrate direct interband transitions around 0.9 eV, while the lowest indirect transitions are observed close to 0.4 eV. According to ab initio calculations, ideally structured Mn17Si30 is a degenerate n-type semiconductor; however, the Hall measurements on the both investigated materials reveal their p-type conductivity and degenerate nature. Such a shift of the Fermi level is attributed to introduction of silicon vacancies in accordance with our DFT calculations and optical characteristics in low photon energy range (0.076-0.4 eV). The Hall mobility for Mn17Si30 thin film was found to be 25 cm(2)/V s at T = 77 K, being the highest among all HMS known before. X-ray photoelectron spectroscopy discloses a presence of plasmon satellites in the Mn4Si7 and Mn17Si30 valence band spectra. Experimental permittivity spectra for the Mn4Si7 and Mn17Si30 compounds in a wide range (0.076-6.54 eV) also indicate degenerate nature of both materials and put more emphasis upon the intrinsic relationship between lattice defects and optical properties.

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Издание

Журнал: JOURNAL OF MATERIALS SCIENCE

Выпуск журнала: Vol. 53, Is. 10

Номера страниц: 7571-7594

ISSN журнала: 00222461

Место издания: NEW YORK

Издатель: SPRINGER

Авторы

  • Tarasov Ivan A. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Visotin Maxim A. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Kuznetzova Tatiana V. (UB RAS, MN Miheev Inst Met Phys, Ekaterinburg 620108, Russia; Ural Fed Univ, Inst Phys & Technol, Ekaterinburg 620002, Russia)
  • Aleksandrovsky Aleksandr S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Nanotechnol Quantum Chem & Spect, Krasnoyarsk 660041, Russia)
  • Solovyov Leonid A. (Fed Res Ctr KSC SB RAS, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia)
  • Kuzubov Aleksandr A. (Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Nikolaeva Kristina M. (Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Fedorov Aleksandr S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Tarasov Anton S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Tomilin Felix N. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Volochaev Michail N. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia)
  • Yakovlev Ivan A. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Smolyarova Tatiana E. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Ivanenko Aleksandr A. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Pryahina Victoria I. (Ural Fed Univ, Inst Nat Sci, Ekaterinburg 620000, Russia)
  • Esin Alexander A. (Ural Fed Univ, Inst Nat Sci, Ekaterinburg 620000, Russia)
  • Yarmoshenko Yuri M. (UB RAS, MN Miheev Inst Met Phys, Ekaterinburg 620108, Russia)
  • Shur Vladimir Ya (Ural Fed Univ, Inst Nat Sci, Ekaterinburg 620000, Russia)
  • Varnakov Sergey N. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Ovchinnikov Sergey G. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)

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