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  • Hilfiker, MatthewUniv Nebraska Lincoln, NE 68588 USA (author)

Dielectric function tensor (1.5 eV to 9.0 eV), anisotropy, and band to band transitions of monoclinic -(AlxGa1-x)(2)O-3 (x 0.21) films

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • AMER INST PHYSICS,2019
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-158877
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158877URI
  • https://doi.org/10.1063/1.5097780DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Funding Agencies|National Science Foundation [DMR 1808715]; Air Force Office of Scientific Research [FA9550-18-1-0360]; Nebraska Materials Research Science and Engineering Center [DMR 1420645]; Swedish Energy Agency [P45396-1]; Swedish Research Council VR Award [2016-00889]; Swedish Foundation for Strategic Research Grant [FL12-0181, RIF14-055, EM16-0024]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University, Faculty Grant SFO Mat LiU [2009-00971]; University of Nebraska Foundation; J. A. Woollam Foundation; AFOSR [FA9550-18-1-0059, FA9550-18-1-0479]; DTRA [HDTRA 11710034]
  • A set of monoclinic -(AlxGa1-x)(2)O-3 films coherently grown by plasma-assisted molecular beam epitaxy onto (010)-oriented -Ga2O3 substrates for compositions x0.21 is investigated by generalized spectroscopic ellipsometry at room temperature in the spectral range of 1.5eV-9.0eV. We present the composition dependence of the excitonic and band to band transition energy parameters using a previously described eigendielectric summation approach for -Ga2O3 from the study by Mock et al. All energies shift to a shorter wavelength with the increasing Al content in accordance with the much larger fundamental band to band transition energies of Al2O3 regardless of crystal symmetry. The observed increase in the lowest band to band transition energy is in excellent agreement with recent theoretical predictions. The most important observation is that charge confinement in heterostructures will strongly depend on the growth condition due to the strongly anisotropic properties of the band to band transitions.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Kilic, UfukUniv Nebraska Lincoln, NE 68588 USA (author)
  • Mock, AlyssaLinköpings universitet,Halvledarmaterial,Tekniska fakulteten(Swepub:liu)alymo28 (author)
  • Darakchieva, VanyaLinköpings universitet,Halvledarmaterial,Tekniska fakulteten(Swepub:liu)vanda79 (author)
  • Knight, SeanUniv Nebraska Lincoln, NE 68588 USA (author)
  • Korlacki, RafalUniv Nebraska Lincoln, NE 68588 USA (author)
  • Mauze, AkhilUniv Calif Santa Barbara, CA 93106 USA (author)
  • Zhang, YueweiUniv Calif Santa Barbara, CA 93106 USA (author)
  • Speck, JamesUniv Calif Santa Barbara, CA 93106 USA (author)
  • Schubert, MathiasLinköpings universitet,Halvledarmaterial,Tekniska fakulteten,Univ Nebraska Lincoln, NE 68588 USA; Leibniz Inst Polymerforsch eV, Germany(Swepub:liu)schma39 (author)
  • Univ Nebraska Lincoln, NE 68588 USAHalvledarmaterial (creator_code:org_t)

Related titles

  • In:Applied Physics Letters: AMER INST PHYSICS114:230003-69511077-3118

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