Tuning Conductivity and Spin Dynamics in Few-Layer Graphene via In Situ Potassium Exposure

Márkus BG, Sági O, Kollarics S, Edelthalhammer K, Hirsch A, Hauke F, Szirmai P, Náfrádi B, Forró L, Simon F (2020)

Publication Type: Journal article

Publication year: 2020

Journal

DOI: 10.1002/pssb.202000368

Abstract

Chemical modification such as intercalation or doping of novel materials is of great importance for exploratory material science and applications in various fields of physics and chemistry. Herein, the systematic intercalation of chemically exfoliated few-layer graphene with potassium is reported while monitoring the sample resistance using microwave conductivity. It is found that the conductivity of the samples increases by about an order of magnitude upon potassium exposure. The increased number of charge carriers deduced from the electron spin resonance (ESR) intensity also reflects this increment. The doped phases exhibit two asymmetric Dysonian lines in ESR, a usual sign of the presence of mobile charge carriers. The width of the broader component increases with the doping steps; however, the narrow components seem to have a constant line width.

Authors with CRIS profile

Konstantin Edelthalhammer Lehrstuhl für Organische Chemie II Andreas Hirsch Lehrstuhl für Organische Chemie II Frank Hauke Lehrstuhl für Organische Chemie II

Involved external institutions

Budapest University of Technology and Economics (BME) / Budapesti Műszaki és Gazdaságtudományi Egyetem

Hungary (HU) École Polytechnique Fédérale de Lausanne (EPFL)

Switzerland (CH)

How to cite

APA:

Márkus, B.G., Sági, O., Kollarics, S., Edelthalhammer, K., Hirsch, A., Hauke, F.,... Simon, F. (2020). Tuning Conductivity and Spin Dynamics in Few-Layer Graphene via In Situ Potassium Exposure. physica status solidi (b). https://dx.doi.org/10.1002/pssb.202000368

MLA:

Márkus, Bence Gábor, et al. "Tuning Conductivity and Spin Dynamics in Few-Layer Graphene via In Situ Potassium Exposure." physica status solidi (b) (2020).

BibTeX: Download