Conductance of partially disordered graphene: crossover from temperature-dependent to field-dependent variable-range hopping

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Conductance of partially disordered graphene: crossover from temperature-dependent to field-dependent variable-range hopping.

We report an analysis of low-temperature measurements of the conductance of partially disordered reduced graphene oxide, finding that the data follow a simple crossover scenario. At room temperature, the conductance is dominated by two-dimensional (2D) electric field-assisted, thermally driven (Pollak-Riess) variable-range hopping (VRH) through highly disordered regions. However, at lower tempe...

متن کامل

Magnetic-field-induced crossover from Mott variable-range hopping to weakly insulating behavior.

There is considerable current interest in the magnetotransport of insulators that exhibit variable-range-hopping conductivity. Interesting, complex behavior has been found as a function of magnetic field. A substantial initial decrease in resistance, which saturates at fields around 2 or 3 T, has been attributed to quantum interference effects. A second and apparently distinct decrease or minim...

متن کامل

Impurity state and variable range hopping conduction in graphene.

The variable range hopping theory, as formulated for exponentially localized impurity states, does not necessarily apply in the case of graphene with covalently attached impurities. We analyze the localization of impurity states in graphene using the nearest-neighbor, tight-binding model of an adatom-graphene system with Green's function perturbation methods. The amplitude of the impurity state...

متن کامل

Physics of a disordered Dirac point in epitaxial graphene from temperature-dependent magnetotransport measurements

J. Huang,1 J. A. Alexander-Webber,1 A. M. R. Baker,1 T. J. B. M. Janssen,2 A. Tzalenchuk,2,3 V. Antonov,3 T. Yager,4 S. Lara-Avila,4 S. Kubatkin,4 R. Yakimova,5 and R. J. Nicholas1,* 1Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom 2National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom 3Department of Physics...

متن کامل

Semiconducting-to-metallic photoconductivity crossover and temperature-dependent Drude weight in graphene.

We investigate the transient photoconductivity of graphene at various gate-tuned carrier densities by optical-pump terahertz-probe spectroscopy. We demonstrate that graphene exhibits semiconducting positive photoconductivity near zero carrier density, which crosses over to metallic negative photoconductivity at high carrier density. These observations can be accounted for by the interplay betwe...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal of Physics: Condensed Matter

سال: 2013

ISSN: 0953-8984,1361-648X

DOI: 10.1088/0953-8984/25/46/465303