TY - JOUR
T1 - Nonlinear resistivity and critical behavior of metal-overlayer percolation systems on epitaxial fullerene films
AU - Wu, J.
AU - Zhao, W B
AU - Chen, J.
AU - Wu, K.
AU - Wang, Z.
AU - Zhang, J. L.
AU - Li, C. Y.
AU - Yin, D. L.
AU - Gu, Z. N.
AU - Jin, Z. X.
AU - Zhou, X. H.
PY - 1996/1/1
Y1 - 1996/1/1
N2 - Fullerene ((Formula presented) and (Formula presented)) films were epitaxially grown on fresh (001) mica with the fcc closed-packed plane parallel to the substrate surface. Metal overlayers were deposited onto these fullerene films in an ultrahigh-vacuum chamber, and in situ resistance measurements were performed. With increasing current, we observed a reversible resistance variation and irreversible breakdown. Near the percolation threshold, we find the power law scaling behavior (Formula presented)∼(Formula presented), where (Formula presented) is the breakdown current and R the sample resistance. The exponent a is much smaller than the values given by previous experiments and the prediction of the conventional Nodes-Links-Blobs model. A possible explanation of these phenomena based on metal-fullerene interfacial interactions is discussed. © 1996 The American Physical Society.
AB - Fullerene ((Formula presented) and (Formula presented)) films were epitaxially grown on fresh (001) mica with the fcc closed-packed plane parallel to the substrate surface. Metal overlayers were deposited onto these fullerene films in an ultrahigh-vacuum chamber, and in situ resistance measurements were performed. With increasing current, we observed a reversible resistance variation and irreversible breakdown. Near the percolation threshold, we find the power law scaling behavior (Formula presented)∼(Formula presented), where (Formula presented) is the breakdown current and R the sample resistance. The exponent a is much smaller than the values given by previous experiments and the prediction of the conventional Nodes-Links-Blobs model. A possible explanation of these phenomena based on metal-fullerene interfacial interactions is discussed. © 1996 The American Physical Society.
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U2 - 10.1103/PhysRevB.54.9840
DO - 10.1103/PhysRevB.54.9840
M3 - Article
SN - 1098-0121
VL - 54
SP - 9840
EP - 9845
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 14
ER -