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2019

60Co gamma ray damage in homoepitaxial β-Ga2O3 Schottky rectifiers

Yang, J., Koller, G. J., Fares, C., Ren, F., Pearton, S. J., Bae, J., Kim, J. & Smith, D., Jan 1 2019, In : ECS Journal of Solid State Science and Technology. 8, 7, p. Q3041-Q3045

Research output: Contribution to journalArticle

Open Access
Gamma rays
Irradiation
Alpha particles
Gate dielectrics
MOSFET devices
5 Citations (Scopus)

Damage recovery and dopant diffusion in Si and Sn ion implanted β-Ga2O3

Tadjer, M. J., Fares, C., Mahadik, N. A., Freitas, J. A., Smith, D., Sharma, R., Law, M. E., Ren, F., Pearton, S. J. & Kuramata, A., Jan 1 2019, In : ECS Journal of Solid State Science and Technology. 8, 7, p. Q3133-Q3139

Research output: Contribution to journalArticle

Open Access
Doping (additives)
Annealing
Ions
Recovery
Lattice constants

DC and dynamic switching characteristics of field-plated vertical geometry β-Ga 2 O 3 rectifiers

Yang, J., Carey, P., Ren, F., Chen, Y. T., Liao, Y., Chang, C. W., Lin, J., Tadjer, M., Pearton, S. J., Smith, D. & Kuramata, A., Jan 1 2019, Oxide-Based Materials and Devices X. Rogers, D. J., Teherani, F. H. & Look, D. C. (eds.). SPIE, 1091916. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10919).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

rectifiers
Electric breakdown
Breakdown
Reverse
Diodes
3 Citations (Scopus)

Defects at the surface of β -Ga2O3 produced by Ar plasma exposure

Polyakov, A. Y., Lee, I. H., Smirnov, N. B., Yakimov, E. B., Shchemerov, I. V., Chernykh, A. V., Kochkova, A. I., Vasilev, A. A., Carey, P. H., Ren, F., Smith, D. & Pearton, S. J., Jun 1 2019, In : APL Materials. 7, 6, 061102.

Research output: Contribution to journalArticle

Open Access
Plasmas
Defects
Electron traps
Vapor phase epitaxy
Inductively coupled plasma
1 Citation (Scopus)

Electron holography

Dunin-Borkowski, R. E., Kovács, A., Kasama, T., McCartney, M. R. & Smith, D. J., Jan 1 2019, Springer Handbooks. Springer, p. 767-818 52 p. (Springer Handbooks).

Research output: Chapter in Book/Report/Conference proceedingChapter

holography
electrons
phase shift
electric fields
magnetic domains

Epitaxial Oxides on Glass: A Platform for Integrated Oxide Devices

Ortmann, J. E., McCartney, M. R., Posadas, A., Smith, D. & Demkov, A. A., Jan 1 2019, (Accepted/In press) In : ACS Applied Nano Materials.

Research output: Contribution to journalArticle

Open Access
Silicon
Oxides
Transition metals
Glass
Crystalline materials

Growth habits of bismuth selenide (bi2se3) layers and nanowires over stranski-krastanov indium arsenide quantum dots

Claro, M. S., Levy, I., Garcia, T. A., Gangopadhyay, A., Smith, D. J. & Tamargo, M. C., Dec 4 2019, In : Crystal Growth and Design. 19, 12, p. 6989-6993 5 p.

Research output: Contribution to journalArticle

Indium arsenide
Bismuth
selenides
habits
bismuth

Molecular beam epitaxial growth and structural properties of hetero-crystalline and heterovalent PbTe/CdTe/InSb structures

Lassise, M. B., McCarthy, T. T., Tracy, B. D., Smith, D. J. & Zhang, Y. H., Jul 28 2019, In : Journal of Applied Physics. 126, 4, 045708.

Research output: Contribution to journalArticle

Open Access
molecular beams
halites
zincblende
chalcogenides
photometers
1 Citation (Scopus)
Electron holography
holography
Electrostatics
electrostatics
Charge density
3 Citations (Scopus)

Self-assembled Bismuth Selenide (Bi 2 Se 3 ) quantum dots grown by molecular beam epitaxy

Claro, M. S., Levy, I., Gangopadhyay, A., Smith, D. & Tamargo, M. C., Dec 1 2019, In : Scientific reports. 9, 1, 3370.

Research output: Contribution to journalArticle

Open Access
Quantum Dots
Bismuth
Atomic Force Microscopy
Growth
Selenium
1 Citation (Scopus)

Strain-dependence of χ (2) in thin film barium strontium titanate

Foster, N. D., Edmondson, B. I., Ekerdt, J. G., Smith, D. & Downer, M. C., Feb 1 2019, In : AIP Advances. 9, 2, 025312.

Research output: Contribution to journalArticle

Open Access
strontium
barium
harmonic generations
thin films
electro-optics
3 Citations (Scopus)

Strain relaxation in low-mismatched GaAs/GaAs1-xSbx/GaAs heterostructures

Gangopadhyay, A., Maros, A., Faleev, N. & Smith, D., Jan 1 2019, In : Acta Materialia. 162, p. 103-115 13 p.

Research output: Contribution to journalArticle

Strain relaxation
Heterojunctions
Thick films
Film thickness
High resolution transmission electron microscopy

Strategies for Analyzing Noncommon-Atom Heterovalent Interfaces: The Case of CdTe-on-InSb

Luna, E., Trampert, A., Lu, J., Aoki, T., Zhang, Y. H., McCartney, M. R. & Smith, D. J., Jan 1 2019, (Accepted/In press) In : Advanced Materials Interfaces. 1901658.

Research output: Contribution to journalArticle

Open Access
Electron microscopy
Imaging techniques
Atoms
Electron energy loss spectroscopy
Photodetectors
5 Citations (Scopus)

Switching behavior and forward bias degradation of 700V, 0.2a, β-Ga2O3 vertical geometry rectifiers

Yang, J., Fares, C., Ren, F., Chen, Y. T., Liao, Y. T., Chang, C. W., Lin, J., Tadjer, M., Smith, D., Pearton, S. J. & Kuramata, A., Jan 1 2019, In : ECS Journal of Solid State Science and Technology. 8, 7, p. Q3028-Q3033

Research output: Contribution to journalArticle

Open Access
Recovery
Degradation
Geometry
Epitaxial layers
Delamination
2018
1 Citation (Scopus)

An EELS signal-from-background separation algorithm for spectral line-scan/image quantification

Lu, S., Kormondy, K. J., Demkov, A. A. & Smith, D., Dec 1 2018, In : Ultramicroscopy. 195, p. 25-31 7 p.

Research output: Contribution to journalArticle

Electron energy loss spectroscopy
line spectra
Energy dissipation
energy dissipation
regression analysis
1 Citation (Scopus)

Atomic structure of dissociated 60° dislocations in GaAs/GaAs0.92Sb0.08/GaAs heterostructures

Gangopadhyay, A., Maros, A., Faleev, N. & Smith, D., Aug 1 2018, In : Scripta Materialia. 153, p. 77-80 4 p.

Research output: Contribution to journalArticle

Stacking faults
atomic structure
Heterojunctions
Strain relaxation
Aberrations

Correlative characterization of dislocation defects and defect clusters in GaAs and CdTe solar cells by spatially resolved optical techniques and high-resolution TEM

Chen, Q., McKeon, B. S., Becker, J., Zhang, S., Hu, C. K., Gfroerer, T. H., Gfroerer, T. H., Zhang, Y-H., Smith, D. & Zhang, Y., Nov 26 2018, 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC. Institute of Electrical and Electronics Engineers Inc., p. 3234-3236 3 p. 8548288. (2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Solar cells
Transmission electron microscopy
Defects
Electroluminescence
Photoluminescence
5 Citations (Scopus)

Crystalline SrZrO3 deposition on Ge (001) by atomic layer deposition for high-k dielectric applications

Hu, S., Ji, L., Chen, P. Y., Edmondson, B. I., Chang, H. L., Posadas, A., Wu, H. W., Yu, E. T., Smith, D., Demkov, A. A. & Ekerdt, J. G., Jul 28 2018, In : Journal of Applied Physics. 124, 4, 044102.

Research output: Contribution to journalArticle

atomic layer epitaxy
electrical measurement
capacitance
oxygen plasma
metal oxide semiconductors
4 Citations (Scopus)

Effect of SrTiO 3 oxygen vacancies on the conductivity of LaTiO 3 /SrTiO 3 heterostructures

Edmondson, B. I., Liu, S., Lu, S., Wu, H. W., Posadas, A., Smith, D., Gao, X. P. A., Demkov, A. A. & Ekerdt, J. G., Nov 14 2018, In : Journal of Applied Physics. 124, 18, 185303.

Research output: Contribution to journalArticle

conductivity
oxygen
partial pressure
templates
cells
2 Citations (Scopus)

EuO epitaxy by oxygen scavenging on SrTiO 3 (001): Effect of SrTiO 3 thickness and temperature

Guo, W., Posadas, A. B., Lu, S., Smith, D. & Demkov, A. A., Dec 21 2018, In : Journal of Applied Physics. 124, 23, 235301.

Research output: Contribution to journalArticle

scavenging
epitaxy
oxygen
temperature
ferromagnetic materials
2 Citations (Scopus)

Growth of II-VI/III-V heterovalent quantum structures

Lassise, M. B., Wang, P., Tracy, B. D., Chen, G., Smith, D. & Zhang, Y-H., Mar 1 2018, In : Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics. 36, 2, 02D110.

Research output: Contribution to journalArticle

Semiconductor quantum wells
Heterojunctions
Defects
Optical transitions
Epilayers
2 Citations (Scopus)

Impact of metastable phases on electrical properties of Si with different doping concentrations after processing by high-pressure torsion

Chon, B., Ikoma, Y., Kohno, M., Shiomi, J., McCartney, M., Smith, D. & Horita, Z., Dec 1 2018, In : Scripta Materialia. 157, p. 120-123 4 p.

Research output: Contribution to journalArticle

Metastable phases
Torsional stress
torsion
Electric properties
electrical properties
3 Citations (Scopus)

Investigation of defect creation in GaP/Si(0 0 1) epitaxial structures

Zhang, C., Boley, A., Faleev, N., Smith, D. & Honsberg, C., Dec 1 2018, In : Journal of Crystal Growth. 503, p. 36-44 9 p.

Research output: Contribution to journalArticle

Molecular beam epitaxy
Defects
defects
molecular beam epitaxy
Defect density
11 Citations (Scopus)

Large positive linear magnetoresistance in the two-dimensional t 2g electron gas at the EuO/SrTiO3 interface

Kormondy, K. J., Gao, L., Li, X., Lu, S., Posadas, A. B., Shen, S., Tsoi, M., McCartney, M., Smith, D., Zhou, J., Lev, L. L., Husanu, M. A., Strocov, V. N. & Demkov, A. A., Dec 1 2018, In : Scientific Reports. 8, 1, 7721.

Research output: Contribution to journalArticle

electron gas
oxides
proximity
oxygen
leaves
1 Citation (Scopus)

Microstructural Characterization of Defects and Chemical Etching for HgCdSe/ZnTe/Si (211) Heterostructures

Vaghayenegar, M., Doyle, K. J., Trivedi, S., Wijewarnasuriya, P. & Smith, D., Jan 1 2018, (Accepted/In press) In : Journal of Electronic Materials.

Research output: Contribution to journalArticle

etchants
Stacking faults
Heterojunctions
Etching
etching
1 Citation (Scopus)

Surface structure analysis of Eu Zintl template on Ge(001)

Ponath, P., Hamze, A. K., Posadas, A. B., Lu, S., Wu, H. W., Smith, D. & Demkov, A. A., Aug 1 2018, In : Surface Science. 674, p. 94-102 9 p.

Research output: Contribution to journalArticle

Europium
europium
Surface structure
Monolayers
templates
2016

Anchorage of γ-Al2O3 nanoparticles on nitrogen-doped multiwalled carbon nanotubes

Rodríguez-Pulido, A., Martínez-Gutiérrez, H., Calderon-Polania, G. A., Lozano, M. A. G., Cullen, D. A., Terrones, H., Smith, D. & Terrones, M., Oct 1 2016, In : Scripta Materialia. 123, p. 17-20 4 p.

Research output: Contribution to journalArticle

Multiwalled carbon nanotubes (MWCN)
Nanotubes
Electron microscopy
bundles
Nitrogen
10 Citations (Scopus)

Anti-phase boundaries at the SrTiO3/Si(001) interface studied using aberration-corrected scanning transmission electron microscopy

Wu, H., Aoki, T., Posadas, A. B., Demkov, A. A. & Smith, D., Feb 29 2016, In : Applied Physics Letters. 108, 9, 091605.

Research output: Contribution to journalArticle

antiphase boundaries
aberration
transmission electron microscopy
scanning electron microscopy
image resolution
4 Citations (Scopus)
Aberrations
aberration
Semiconductor materials
Transmission electron microscopy
Imaging techniques
6 Citations (Scopus)

Characterization of electrical properties in axial Si-Ge nanowire heterojunctions using off-axis electron holography and atom-probe tomography

Gan, Z., Perea, D. E., Yoo, J., He, Y., Colby, R. J., Barker, J. E., Gu, M., Mao, S. X., Wang, C., Picraux, S. T., Smith, D. & McCartney, M., Sep 14 2016, In : Journal of Applied Physics. 120, 10, 104301.

Research output: Contribution to journalArticle

holography
heterojunctions
nanowires
tomography
electrical properties
7 Citations (Scopus)

Characterization of structural defects in SnSe2 thin films grown by molecular beam epitaxy on GaAs (111)B substrates

Tracy, B. D., Li, X., Liu, X., Furdyna, J., Dobrowolska, M. & Smith, D., Nov 1 2016, In : Journal of Crystal Growth. 453, p. 58-64 7 p.

Research output: Contribution to journalArticle

Molecular beam epitaxy
molecular beam epitaxy
Fluxes
Epitaxial growth
Thin films
1 Citation (Scopus)

Continuous control of spin polarization using a magnetic field

Gifford, J. A., Zhao, G. J., Li, B. C., Tracy, B. D., Zhang, J., Kim, D. R., Smith, D. & Chen, T., May 23 2016, In : Applied Physics Letters. 108, 21, 212401.

Research output: Contribution to journalArticle

polarization
magnetic fields
electric potential
spectroscopy
3 Citations (Scopus)

Contradictory nature of Co doping in ferroelectric BaTi O3

Ponath, P., O'Hara, A., Cao, H. X., Posadas, A. B., Vasudevan, R., Okatan, M. B., Jesse, S., Berg, M., Li, Z., Zhang, D., Kellock, A. J., De Lozanne, A., Zhou, J., Kalinin, S., Smith, D. & Demkov, A. A., 2016, In : Physical Review B - Condensed Matter and Materials Physics. 94, 20, 205121.

Research output: Contribution to journalArticle

Oxygen vacancies
Ferroelectric materials
Doping (additives)
x ray spectroscopy
oxygen
13 Citations (Scopus)

Critical issues for homoepitaxial GaN growth by molecular beam epitaxy on hydride vapor-phase epitaxy-grown GaN substrates

Storm, D. F., Hardy, M. T., Katzer, D. S., Nepal, N., Downey, B. P., Meyer, D. J., McConkie, T. O., Zhou, L. & Smith, D., Dec 15 2016, In : Journal of Crystal Growth. 456, p. 121-132 12 p.

Research output: Contribution to journalArticle

Vapor phase epitaxy
Molecular beam epitaxy
Hydrides
vapor phase epitaxy
hydrides
18 Citations (Scopus)

Direct mapping of charge distribution during lithiation of Ge nanowires using off-axis electron holography

Gan, Z., Gu, M., Tang, J., Wang, C. Y., He, Y., Wang, K. L., Wang, C., Smith, D. & McCartney, M., Jun 8 2016, In : Nano Letters. 16, 6, p. 3748-3753 6 p.

Research output: Contribution to journalArticle

Electron holography
Charge distribution
holography
charge distribution
Nanowires
1 Citation (Scopus)

Evaluation of AlGaN/GaN high electron mobility transistors grown on ZrTi buffer layers with sapphire substrates

Ren, F., Pearton, S. J., Ahn, S., Lin, Y. H., Machuca, F., Weiss, R., Welsh, A., McCartney, M., Smith, D. & Kravchenko, I. I., Sep 1 2016, In : Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics. 34, 5, 051208.

Research output: Contribution to journalArticle

Aluminum Oxide
High electron mobility transistors
Buffer layers
high electron mobility transistors
Sapphire
24 Citations (Scopus)

Evaluation of antimony segregation in InAs/InAs1-xSbx type-II superlattices grown by molecular beam epitaxy

Lu, J., Luna, E., Aoki, T., Steenbergen, E. H., Zhang, Y-H. & Smith, D., Mar 7 2016, In : Journal of Applied Physics. 119, 9, 095702.

Research output: Contribution to journalArticle

antimony
superlattices
molecular beam epitaxy
evaluation
profiles
2 Citations (Scopus)

Impact of dynamical scattering on quantitative contrast for aberration-corrected transmission electron microscope images

Wen, C. & Smith, D., Oct 1 2016, In : Micron. 89, p. 77-86 10 p.

Research output: Contribution to journalArticle

Electrons
18 Citations (Scopus)

Impact of severe plastic deformation on microstructure and hydrogen storage of titanium-iron-manganese intermetallics

Edalati, K., Matsuo, M., Emami, H., Itano, S., Alhamidi, A., Staykov, A., Smith, D., Orimo, S. I., Akiba, E. & Horita, Z., Nov 1 2016, In : Scripta Materialia. 124, p. 108-111 4 p.

Research output: Contribution to journalArticle

Hydrogen storage
Manganese
Titanium
plastic deformation
Intermetallics
5 Citations (Scopus)
Molecular beam epitaxy
Nitrides
nitrides
Solar cells
solar cells
12 Citations (Scopus)

Monolithic integration of perovskites on Ge(001) by atomic layer deposition: A case study with SrHfxTi1-xO3

Hu, S., McDaniel, M. D., Posadas, A., Hu, C., Wu, H., Yu, E. T., Smith, D., Demkov, A. A. & Ekerdt, J. G., Sep 1 2016, In : MRS Communications. 6, 3, p. 125-132 8 p.

Research output: Contribution to journalArticle

Atomic layer deposition
Epitaxial layers
Amorphous films
Crystallization
Chemical analysis
2 Citations (Scopus)

Morphological and microstructural stability of N-polar InAlN thin films grown on free-standing GaN substrates by molecular beam epitaxy

Hardy, M. T., McConkie, T. O., Smith, D., Storm, D. F., Downey, B. P., Katzer, D. S., Meyer, D. J. & Nepal, N., Mar 1 2016, In : Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films. 34, 2, 021512.

Research output: Contribution to journalArticle

Molecular beam epitaxy
Surface morphology
molecular beam epitaxy
Plasmas
Thin films
2 Citations (Scopus)
Aberrations
aberration
Semiconductor materials
Transmission electron microscopy
Dislocations (crystals)
4 Citations (Scopus)

Recent studies of oxide-semiconductor heterostructures using aberration-corrected scanning transmission electron microscopy

Smith, D., Wu, H. W., Lu, S., Aoki, T., Ponath, P., Fredrickson, K., McDaniel, M. D., Lin, E., Posadas, A. B., Demkov, A. A., Ekerdt, J. & McCartney, M., Aug 1 2016, (Accepted/In press) In : Journal of Materials Research. p. 1-9 9 p.

Research output: Contribution to journalArticle

Aberrations
Oxides
Heterojunctions
aberration
Transmission electron microscopy

Recovery in dc performance of off-state step-stressed AlGaN/GaN high electron mobility transistor with thermal annealing

Kim, B. J., Ahn, S., Kang, T. S., Zhu, J., Ren, F., Pearton, S. J. & Smith, D., 2016, CS MANTECH 2016 - International Conference on Compound Semiconductor Manufacturing Technology. CS Mantech, p. 271-273 3 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

High electron mobility transistors
Drain current
Annealing
Recovery
Degradation
4 Citations (Scopus)

Spectral identification scheme for epitaxially grown single-phase niobium dioxide

Hadamek, T., Posadas, A. B., Dhamdhere, A., Smith, D. & Demkov, A. A., Mar 7 2016, In : Journal of Applied Physics. 119, 9, 095308.

Research output: Contribution to journalArticle

dioxides
niobium
niobium oxides
strontium
metals
5 Citations (Scopus)

Spectrum and phase mapping across the epitaxial γ-Al2O3/SrTiO3 interface

Lu, S., Kormondy, K. J., Ngo, T. Q., Aoki, T., Posadas, A., Ekerdt, J. G., Demkov, A. A., McCartney, M. & Smith, D., Feb 1 2016, In : Applied Physics Letters. 108, 5, 051606.

Research output: Contribution to journalArticle

atomic layer epitaxy
holography
oxidation
electron gas
aberration
1 Citation (Scopus)

Structural characterization of niobium oxide thin films grown on SrTiO3 (111) and (La,Sr)(Al,Ta)O3 (111) substrates

Dhamdhere, A. R., Hadamek, T., Posadas, A. B., Demkov, A. A. & Smith, D., Dec 28 2016, In : Journal of Applied Physics. 120, 24, 245302.

Research output: Contribution to journalArticle

niobium oxides
thin films
lattice parameters
high pressure oxygen
transmission electron microscopy
7 Citations (Scopus)

Towards defect-free epitaxial CdTe and MgCdTe layers grown on InSb (001) substrates

Lu, J., DiNezza, M. J., Zhao, X. H., Liu, S., Zhang, Y-H., Kovacs, A., Dunin-Borkowski, R. E. & Smith, D., Apr 1 2016, In : Journal of Crystal Growth. 439, p. 99-103 5 p.

Research output: Contribution to journalArticle

Defects
Electrons
defects
Epitaxial layers
Substrates
2015
2 Citations (Scopus)

An indirect method of studying band alignments in nBn photodetectors using off-axis electron holography

Shen, X. M., He, Z. Y., Liu, S., Lin, Z. Y., Zhang, Y-H., Smith, D. & McCartney, M., Sep 21 2015, In : Applied Physics Letters. 107, 12, 122109.

Research output: Contribution to journalArticle

barrier layers
planetary waves
holography
photometers
alignment