821 citations · 1.9k across the 14 of their papers we have counts for
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cond-mat.mtrl-sci2009★ 104 cited
The role of hydrogen in room-temperature ferromagnetism at graphite surfaces
H. Ohldag, P. Esquinazi, E. Arenholz +4
We present a x-ray dichroism study of graphite surfaces that addresses the origin and magnitude of ferromagnetism in metal-free carbon. We find that, in addition to carbon stat…
cond-mat.mtrl-sci2009
On the origin of the electric carrier concentration in graphite
A. Arndt, D. Spoddig, P. Esquinazi +2
We investigate the dependence of the electrical resistivity of nm thick single crystalline graphite samples on the defect concentration produced by proton irradiation at…
cond-mat.str-el2009★ 57 cited
Magnetic order in Graphite: Experimental evidence, intrinsic and extrinsic difficulties
P. Esquinazi, J. Barzola-Quiquia, D. Spemann +5
We discuss recently obtained data using different experimental methods including magnetoresistance measurements that indicate the existence of metal-free high-temperature magnetic…