Effect of gadolinium adatoms on the transport properties of graphene

The electrical transport properties of graphene doped with gadolinium (Gd) adatoms have been measured. The gate voltage dependence of the conductivity shows that Gd produces n doping of graphene. The charged Gd ions act as scattering centers, lowering the sample mobility for both electrons and holes...

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Veröffentlicht in:	Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-08, Vol.86 (7), Article 075433
Hauptverfasser:	Alemani, M., Barfuss, A., Geng, B., Girit, C., Reisenauer, P., Crommie, M. F., Wang, F., Zettl, A., Hellman, F.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter Doping Electric potential Gadolinium Graphene Resistivity Transport properties Voltage
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creator	Alemani, M. Barfuss, A. Geng, B. Girit, C. Reisenauer, P. Crommie, M. F. Wang, F. Zettl, A. Hellman, F.
description	The electrical transport properties of graphene doped with gadolinium (Gd) adatoms have been measured. The gate voltage dependence of the conductivity shows that Gd produces n doping of graphene. The charged Gd ions act as scattering centers, lowering the sample mobility for both electrons and holes. The doping efficiency of Gd at 77 K reproduces theoretical predictions (0.7 electron per Gd adatom). On raising the sample temperature to even 150 K, clustering effects are observed and substantially modify the transport.
doi_str_mv	10.1103/PhysRevB.86.075433
format	Article
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subjects	Condensed matter Doping Electric potential Gadolinium Graphene Resistivity Transport properties Voltage
title	Effect of gadolinium adatoms on the transport properties of graphene
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