Study and characterization of SrTiO3 surface

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F18%3A43955462" target="_blank" >RIV/49777513:23640/18:43955462 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.5048853" target="_blank" >http://dx.doi.org/10.1063/1.5048853</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5048853" target="_blank" >10.1063/1.5048853</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study and characterization of SrTiO3 surface

Popis výsledku v původním jazyce

Two-dimensional electron gas (2DEG) at an oxides interfaces and surfaces has attracted large attention in physics and research due to its unique electronic properties and possible application in optoelectronic and nano-electronic. The origin of 2DEG at oxide interfaces has been awarded to well known “polar catastrophe” mechanism. On the other hand, recently 2DEG has been also found on clean SrTiO3 (001) surface due to the creation of oxygen vacancies. However, these 2DEG systems have been until now found mostly on an atomically perfect crystalline samples usually grown by pulse laser deposition or molecular beam epitaxy e.g. samples which are difficult to be prepared and require specific experimental conditions. Here, we report on the fabrication of SrTiO3 thin films deposited by magnetron sputtering which is suitable for mass-production of samples adapted for nano-electronic applications. The characterization of their structural and electronic properties were studied and compared to those of SrTiO3 single crystal. XRD patterns and SEM micrography showed that the deposited films are amorphous and their structure changed to polycrystalline after heating at 900_C. Photoemission spectroscopy (XPS and UPS) were used to study the electronic properties of the films and crystal. In both, we observed the 2DEG system at Fermi level and the formation of Ti3+ state when the surface was heated at 900_C.

Název v anglickém jazyce

Study and characterization of SrTiO3 surface

Popis výsledku anglicky

Two-dimensional electron gas (2DEG) at an oxides interfaces and surfaces has attracted large attention in physics and research due to its unique electronic properties and possible application in optoelectronic and nano-electronic. The origin of 2DEG at oxide interfaces has been awarded to well known “polar catastrophe” mechanism. On the other hand, recently 2DEG has been also found on clean SrTiO3 (001) surface due to the creation of oxygen vacancies. However, these 2DEG systems have been until now found mostly on an atomically perfect crystalline samples usually grown by pulse laser deposition or molecular beam epitaxy e.g. samples which are difficult to be prepared and require specific experimental conditions. Here, we report on the fabrication of SrTiO3 thin films deposited by magnetron sputtering which is suitable for mass-production of samples adapted for nano-electronic applications. The characterization of their structural and electronic properties were studied and compared to those of SrTiO3 single crystal. XRD patterns and SEM micrography showed that the deposited films are amorphous and their structure changed to polycrystalline after heating at 900_C. Photoemission spectroscopy (XPS and UPS) were used to study the electronic properties of the films and crystal. In both, we observed the 2DEG system at Fermi level and the formation of Ti3+ state when the surface was heated at 900_C.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

<a href="/cs/project/EF15_003%2F0000358" target="_blank" >EF15_003/0000358: Výpočetní a experimentální design pokročilých materiálů s novými funkcionalitami</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

AIP Conference Proceedings 2018

ISBN

978-0-7354-1712-0

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

5

Strana od-do

"NESTRÁNKOVÁNO"

Název nakladatele

American Institute of Physics Inc.

Místo vydání

Strbske Pleso

Místo konání akce

Strbske Pleso

Datum konání akce

20. 7. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000443464900001