Observation of bandgap closing in SrxBa1−xBiO3 films: Evidence toward topological order in BaBiO3
| Autor: | Riley Vesto, Hyungsoo Choi, Kyekyoon Kim |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 132:015102 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | [Formula: see text] ([Formula: see text]) films were fabricated from solution-phase precursors using flow-limited field-injection electrostatic spraying to investigate the predicted topological properties of [Formula: see text], 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 [Formula: see text] for [Formula: see text], decreasing with an increase in [Formula: see text] to reach zero at [Formula: see text]. This suggests that [Formula: see text] 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. |
| Databáze: | OpenAIRE |
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