7 papers · 1 filter
Conductance of p-n-p graphene structures with 'air-bridge' top gates
R. V. Gorbachev, A. S. Mayorov, A. K. Savchenko +2
We have fabricated graphene devices with a top gate separated from the graphene layer by an air gap--a design which does not decrease the mobility of charge carriers under the gate…
Quantum interference in bilayer graphene
R. V. Gorbachev, F. V. Tikhonenko, A. S. Mayorov +2
We report the first experimental study of the quantum interference correction to the conductivity of bilayer graphene. Low-field, positive magnetoconductivity due to the weak local…
Weak localisation in graphene flakes
F. V. Tikhonenko, D. W. Horsell, R. V. Gorbachev +1
We show that the manifestation of quantum interference in graphene is very different from that in conventional two-dimensional systems. Due to the chiral nature of charge carriers,…
Giant Fluctuations of Coulomb Drag in a Bilayer System
A. S. Price, A. K. Savchenko, B. N. Narozhny +2
We have observed reproducible fluctuations of the Coulomb drag, both as a function of magnetic field and electron concentration, which are a manifestation of quantum interference o…
Metallic and insulating behaviour of the two-dimensional electron gas on a vicinal surface of Si MOSFETs
S. S. Safonov, S. H. Roshko, A. K. Savchenko +2
The resistance R of the 2DEG on the vicinal Si surface shows an unusual behaviour, which is very different from that in the (100) Si MOSFET where an unconventional metal to insulat…
Effect of the angular momentum on the magnitude of the current in magneto-tunnelling spectroscopy of quantum dots
B. Jouault, J. P. Holder, M. Boero +5
We present an experimental and theoretical study of electron tunnelling through quantum dots which focusses the attention on the amplitude of the current peaks as a function of mag…