99 citations · 391 across the 13 of their papers we have counts for
13 papers
Record-Breaking Magnetoresistance at the Edge of a Microflake of Natural Graphite
Christian E. Precker, Jose Barzola-Quiquia, Pablo D. Esquinazi +5
Placing several electrodes at the edge of a micrometer-size Sri Lankan natural graphite sample at distances comparable to the size of the internal crystalline regions, we found rec…
Fabrication and electrical transport properties of embedded graphite microwires in a diamond matrix
J. Barzola-Quiquia, T. Lühmann, R. Wunderlich +6
Micrometer width and nanometer thick wires with different shapes were produced $\approx 3~\upmu$m below the surface of a diamond crystal using a microbeam of He ions with 1.8~M…
Revealing the origin of the vertical hysteresis loop shifts in an exchange biased Co/YMnO bilayer
J. Barzola-Quiquia, A. Lessig, A. Ballestar +4
We have investigated exchange bias effects in bilayers composed by the antiferromagnetic o-YMnO and ferromagnetic Co thin film by means of SQUID magnetometry, magnetoresistance…
Comment on: "Revealing common artifacts due to ferromagnetic inclusions in highly oriented pyrolytic graphite", by M. Sepioni, R.R. Nair, I.-Ling Tsai, A.K. Geim and I.V. Grigorieva, EPL 97 (2012) 47001
D. Spemann, M. Rothermel, P. Esquinazi +3
This comment addresses several issues in the paper by Sepioni et al., where it is stated that the ferromagnetism in pristine highly oriented pyrolytic graphite (HOPG) reported by s…
Possible superconductivity in multi-layer-graphene by application of a gate voltage
A. Ballestar, P. Esquinazi, J. Barzola-Quiquia +4
The carrier density in tens of nanometers thick graphite samples (multi-layer-graphene, MLG) has been modified by applying a gate voltage () perpendicular to the graphene plan…
Length dependence of the resistance in graphite: Influence of ballistic transport
P. Esquinazi, J. Barzola-Quiquia, S. Dusari +1
Using a linear array of voltage electrodes with a separation of several micrometers on a nm thick and 30 m long multigraphene sample we show that the measured resistance do…