Detail publikace

X-ray induced electrostatic graphene doping via defect charging in gate dielectric

PROCHÁZKA, P. MAREČEK, D. LIŠKOVÁ, Z. ČECHAL, J. ŠIKOLA, T.

Originální název

X-ray induced electrostatic graphene doping via defect charging in gate dielectric

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Graphene field effect transistors are becoming an integral part of advanced devices. Hence, the advanced strategies for both characterization and tuning of graphene properties are required. Here we show that the X-ray irradiation at the zero applied gate voltage causes very strong negative doping of graphene, which is explained by X-ray radiation induced charging of defects in the gate dielectric. The induced charge can be neutralized and compensated if the graphene device is irradiated by X-rays at a negative gate voltage. Here the charge neutrality point shifts back to zero voltage. The observed phenomenon has strong implications for interpretation of X-ray based measurements of graphene devices as it renders them to significantly altered state. Our results also form a basis for remote X-ray tuning of graphene transport properties and X-ray sensors comprising the graphene/oxide interface as an active layer

Klíčová slova

Graphene, Field effect transistor, X-rays, Charged defects, Gate dielectrics

Autoři

PROCHÁZKA, P.; MAREČEK, D.; LIŠKOVÁ, Z.; ČECHAL, J.; ŠIKOLA, T.

Vydáno

3. 4. 2017

Nakladatel

NPG

ISSN

2045-2322

Periodikum

Scientific Reports

Ročník

7

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

7

Strany počet

7

URL

https://www.nature.com/articles/s41598-017-00673-z

Plný text v Digitální knihovně

http://hdl.handle.net/11012/64752

BibTex

@article{BUT134874,
  author="Pavel {Procházka} and David {Mareček} and Zuzana {Lišková} and Jan {Čechal} and Tomáš {Šikola}",
  title="X-ray induced electrostatic graphene doping via defect charging in gate dielectric",
  journal="Scientific Reports",
  year="2017",
  volume="7",
  number="1",
  pages="1--7",
  doi="10.1038/s41598-017-00673-z",
  issn="2045-2322",
  url="https://www.nature.com/articles/s41598-017-00673-z"
}