Search

Your search keyword '"Choi, Hyungsoo"' showing total 133 results
Start Over Author "Choi, Hyungsoo"
133 results on '"Choi, Hyungsoo"'

4. Observation of bandgap closing in SrxBa1−xBiO3 films: Evidence toward topological order in BaBiO3.

Author

Vesto, Riley, Choi, Hyungsoo, and Kim, Kyekyoon

Subjects
*TOPOLOGICAL insulators, *ELECTROSTATIC atomization, *LIGHT absorption, *OPTICAL conductivity, *RAMAN spectroscopy, *MAJORANA fermions
Abstract

Sr x Ba 1 − x BiO 3 (0 ≤ x < 0.5) films were fabricated from solution-phase precursors using flow-limited field-injection electrostatic spraying to investigate the predicted topological properties of BaBiO 3 , an oxide perovskite. The films were analyzed via x-ray diffraction, optical conductivity, and Raman spectroscopy. The bandgaps measured by optical absorption spectroscopy were in line with the predicted value of Sr x Ba 1 − x BiO 3 for x < 0.25 , decreasing with an increase in x to reach zero at x = 0.348. This suggests that BaBiO 3 may have topological order and that, upon appropriate doping, it may be used as a topological insulator or superconductor in quantum-computing devices. This work may open up new avenues toward engineering of topological insulators with precise and reproducible control of stoichiometry, obviating extreme deposition temperatures or vacuum processing. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

5. Observation of bandgap closing in SrxBa1−xBiO3 films: Evidence toward topological order in BaBiO3.

Author

Vesto, Riley, Choi, Hyungsoo, and Kim, Kyekyoon

Subjects
TOPOLOGICAL insulators, ELECTROSTATIC atomization, LIGHT absorption, OPTICAL conductivity, RAMAN spectroscopy, MAJORANA fermions
Abstract

Sr x Ba 1 − x BiO 3 (0 ≤ x < 0.5) films were fabricated from solution-phase precursors using flow-limited field-injection electrostatic spraying to investigate the predicted topological properties of BaBiO 3 , an oxide perovskite. The films were analyzed via x-ray diffraction, optical conductivity, and Raman spectroscopy. The bandgaps measured by optical absorption spectroscopy were in line with the predicted value of Sr x Ba 1 − x BiO 3 for x < 0.25 , decreasing with an increase in x to reach zero at x = 0.348. This suggests that BaBiO 3 may have topological order and that, upon appropriate doping, it may be used as a topological insulator or superconductor in quantum-computing devices. This work may open up new avenues toward engineering of topological insulators with precise and reproducible control of stoichiometry, obviating extreme deposition temperatures or vacuum processing. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

25. Seedless growth of free-standing copper nanowires by chemical vapor deposition

Author

Choi, Hyungsoo and Park, Sung-Ho

Subjects
Nanotechnology -- Research, Copper wire -- Research, Chemical vapor deposition -- Research, Chemistry
Abstract

The process of growing seedless free-standing copper nanowires, unlike the earlier copper nanowires that were composed of rough grain, by the chemical vapor deposition (CVD) at low temperatures is described. These copper nanowires exhibit the properties of high purity and crystallinity with [111] orientation.

Published
2004

46. Optical manipulation of silicon microparticles in biological environments

Author

Oldenburg, Amy L., primary, Moon, Se-Jung, additional, Kasi, Karthy M., additional, Kim, Taekyung, additional, Ho, Chuen, additional, Timp, Rolf, additional, Choi, Hyungsoo, additional, Gelfand, Vladimir I., additional, Roland, Joseph T. E., additional, Kim, Kyekyoon, additional, Boppart, Stephen A., additional, and Timp, Gregory L., additional

Published
2003
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results