Crystal phase control in an YBiO3 thin film by using a Ba BiO3 buffer layer

Research output: Contribution to conferencePosterAcademic

Abstract

Topological insulators have a non-trivial band structure, forming gapless surface states when coupled to a normal insulator. Until now, applications are hindered by the competition between the insulating bulk and conducting surface states.
Perovskite oxides offer a good alternative, since topological insulating phases are theoretically predicted with band gaps larger than the thermal excitation energy at room temperature [1].

In YBiO3, a topological insulating phase is predicted for the perovskite crystal structure [2]. However, the fluorite phase is thermodynamically more stable than the perovskite phase. By using a buffer layer, it is possibile to stabilise the perovskite phase in the YBiO3 film.

When the YBiO3 is deposited on top of a BaBiO3 buffer layer, a single oriented perovskite phase with the expected lattice constants is observed. These findings pave a way towards the fabrication of quantum devices for testing the hypothesised topological insulating phase in YBiO3.

[1] Y. Zhang et al., Phys. Chem. Chem. Phys. 18(11), 8205-8211 (2016).
[2] H. Jin et al., Scientic Reports 3, 1651 (2013).
Original languageEnglish
Publication statusPublished - 22 Jan 2019
EventPhysics@Veldhoven 2019 - De Koningshof, Veldhoven, Netherlands
Duration: 22 Jan 201923 Jan 2019
https://www.nwo.nl/en/news-and-events/events/physicsveldhoven

Conference

ConferencePhysics@Veldhoven 2019
CountryNetherlands
CityVeldhoven
Period22/01/1923/01/19
Internet address

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phase control
buffers
insulators
fluorite
thin films
crystals
conduction
fabrication
crystal structure
oxides
room temperature
excitation
energy

Cite this

Bouwmeester, R. L., de Hond, C. A. J., Gauquelin, N., Verbeeck, J., Koster, G., & Brinkman, A. (2019). Crystal phase control in an YBiO3 thin film by using a Ba BiO3 buffer layer. Poster session presented at Physics@Veldhoven 2019, Veldhoven, Netherlands.
Bouwmeester, Rosa Luca ; de Hond, C.A.J. ; Gauquelin, Nicolas ; Verbeeck, Jo ; Koster, G. ; Brinkman, Alexander . / Crystal phase control in an YBiO3 thin film by using a Ba BiO3 buffer layer. Poster session presented at Physics@Veldhoven 2019, Veldhoven, Netherlands.
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title = "Crystal phase control in an YBiO3 thin film by using a Ba BiO3 buffer layer",
abstract = "Topological insulators have a non-trivial band structure, forming gapless surface states when coupled to a normal insulator. Until now, applications are hindered by the competition between the insulating bulk and conducting surface states.Perovskite oxides offer a good alternative, since topological insulating phases are theoretically predicted with band gaps larger than the thermal excitation energy at room temperature [1].In YBiO3, a topological insulating phase is predicted for the perovskite crystal structure [2]. However, the fluorite phase is thermodynamically more stable than the perovskite phase. By using a buffer layer, it is possibile to stabilise the perovskite phase in the YBiO3 film.When the YBiO3 is deposited on top of a BaBiO3 buffer layer, a single oriented perovskite phase with the expected lattice constants is observed. These findings pave a way towards the fabrication of quantum devices for testing the hypothesised topological insulating phase in YBiO3.[1] Y. Zhang et al., Phys. Chem. Chem. Phys. 18(11), 8205-8211 (2016).[2] H. Jin et al., Scientic Reports 3, 1651 (2013).",
author = "Bouwmeester, {Rosa Luca} and {de Hond}, C.A.J. and Nicolas Gauquelin and Jo Verbeeck and G. Koster and Alexander Brinkman",
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language = "English",
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Bouwmeester, RL, de Hond, CAJ, Gauquelin, N, Verbeeck, J, Koster, G & Brinkman, A 2019, 'Crystal phase control in an YBiO3 thin film by using a Ba BiO3 buffer layer' Physics@Veldhoven 2019, Veldhoven, Netherlands, 22/01/19 - 23/01/19, .

Crystal phase control in an YBiO3 thin film by using a Ba BiO3 buffer layer. / Bouwmeester, Rosa Luca; de Hond, C.A.J.; Gauquelin, Nicolas; Verbeeck, Jo; Koster, G.; Brinkman, Alexander .

2019. Poster session presented at Physics@Veldhoven 2019, Veldhoven, Netherlands.

Research output: Contribution to conferencePosterAcademic

TY - CONF

T1 - Crystal phase control in an YBiO3 thin film by using a Ba BiO3 buffer layer

AU - Bouwmeester, Rosa Luca

AU - de Hond, C.A.J.

AU - Gauquelin, Nicolas

AU - Verbeeck, Jo

AU - Koster, G.

AU - Brinkman, Alexander

PY - 2019/1/22

Y1 - 2019/1/22

N2 - Topological insulators have a non-trivial band structure, forming gapless surface states when coupled to a normal insulator. Until now, applications are hindered by the competition between the insulating bulk and conducting surface states.Perovskite oxides offer a good alternative, since topological insulating phases are theoretically predicted with band gaps larger than the thermal excitation energy at room temperature [1].In YBiO3, a topological insulating phase is predicted for the perovskite crystal structure [2]. However, the fluorite phase is thermodynamically more stable than the perovskite phase. By using a buffer layer, it is possibile to stabilise the perovskite phase in the YBiO3 film.When the YBiO3 is deposited on top of a BaBiO3 buffer layer, a single oriented perovskite phase with the expected lattice constants is observed. These findings pave a way towards the fabrication of quantum devices for testing the hypothesised topological insulating phase in YBiO3.[1] Y. Zhang et al., Phys. Chem. Chem. Phys. 18(11), 8205-8211 (2016).[2] H. Jin et al., Scientic Reports 3, 1651 (2013).

AB - Topological insulators have a non-trivial band structure, forming gapless surface states when coupled to a normal insulator. Until now, applications are hindered by the competition between the insulating bulk and conducting surface states.Perovskite oxides offer a good alternative, since topological insulating phases are theoretically predicted with band gaps larger than the thermal excitation energy at room temperature [1].In YBiO3, a topological insulating phase is predicted for the perovskite crystal structure [2]. However, the fluorite phase is thermodynamically more stable than the perovskite phase. By using a buffer layer, it is possibile to stabilise the perovskite phase in the YBiO3 film.When the YBiO3 is deposited on top of a BaBiO3 buffer layer, a single oriented perovskite phase with the expected lattice constants is observed. These findings pave a way towards the fabrication of quantum devices for testing the hypothesised topological insulating phase in YBiO3.[1] Y. Zhang et al., Phys. Chem. Chem. Phys. 18(11), 8205-8211 (2016).[2] H. Jin et al., Scientic Reports 3, 1651 (2013).

M3 - Poster

ER -

Bouwmeester RL, de Hond CAJ, Gauquelin N, Verbeeck J, Koster G, Brinkman A. Crystal phase control in an YBiO3 thin film by using a Ba BiO3 buffer layer. 2019. Poster session presented at Physics@Veldhoven 2019, Veldhoven, Netherlands.