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Infrared-active pho...
Infrared-active phonon modes and static dielectric constants in α-(AlxGa1−x)2O3 (0.18 ≤ x ≤ 0.54) alloys
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- Stokey, Megan (författare)
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
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- Gramer, Teresa (författare)
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
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- Korlacki, Rafał (författare)
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
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- Knight, Sean Robert (författare)
- Linköping University,Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,Terahertz Materials Analysis Center and Center for III-N Technology, C3NiT–Janzèn
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- Richter, Steffen (författare)
- Linköping University,Lund University,Lunds universitet,Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,NanoLund and Solid State Physics, Lund University, 22100 Lund, Sweden,Terahertz Materials Analysis Center and Center for III-N Technology, C3NiT–Janzèn,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Jinno, Riena (författare)
- School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA;Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan
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- Cho, Yongjin (författare)
- School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA
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- Xing, Huili Grace (författare)
- School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA;Department of Material Science and Engineering, Cornell University, Ithaca, New York 14853, USA
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- Jena, Debdeep (författare)
- School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA;Department of Material Science and Engineering, Cornell University, Ithaca, New York 14853, USA
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- Hilfiker, Matthew (författare)
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
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- Darakchieva, Vanya, 1971- (författare)
- Linköping University,Lund University,Lunds universitet,Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,NanoLund and Solid State Physics, Lund University, 22100 Lund, Sweden,Terahertz Materials Analysis Center and Center for III-N Technology, C3NiT–Janzèn,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Schubert, Mathias, 1966- (författare)
- Linköping University,Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA,Terahertz Materials Analysis Center and Center for III-N Technology, C3NiT–Janzèn
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(creator_code:org_t)
- American Institute of Physics (AIP), 2022
- 2022
- Engelska.
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Ingår i: Applied Physics Letters. - : American Institute of Physics (AIP). - 0003-6951 .- 1077-3118. ; 120:11
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- We determine the composition dependence of the transverse and longitudinal optical infrared-active phonon modes in rhombohedral α-(AlxGa1−x)2O3 alloys by far-infrared and infrared generalized spectroscopic ellipsometry. Single-crystalline high quality undoped thin-films grown on m-plane oriented α-Al2O3 substrates with x = 0.18, 0.37, and 0.54 were investigated. A single mode behavior is observed for all phonon modes, i.e., their frequencies shift gradually between the equivalent phonon modes of the isostructural binary parent compounds. We also provide physical model line shape functions for the anisotropic dielectric functions. We use the anisotropic high-frequency dielectric constants for polarizations parallel and perpendicular to the lattice c axis measured recently by Hilfiker et al. [Appl. Phys. Lett. 119, 092103 (2021)], and we determine the anisotropic static dielectric constants using the Lyddane–Sachs–Teller relation. The static dielectric constants can be approximated by linear relationships between those of α-Ga2O3 and α-Al2O3. The optical phonon modes and static dielectric constants will become useful for device design and free charge carrier characterization using optical techniques.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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Stokey, Megan
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Gramer, Teresa
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Korlacki, Rafał
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Knight, Sean Rob ...
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Richter, Steffen
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Jinno, Riena
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visa fler...
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Cho, Yongjin
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Xing, Huili Grac ...
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Jena, Debdeep
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Hilfiker, Matthe ...
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Darakchieva, Van ...
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Schubert, Mathia ...
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