TY - JOUR
T1 - Giant Hall effect in nonmagnetic Mo/ SnO2 granular films
AU - Wu, Ya Nan
AU - Li, Zhi Qing
AU - Lin, Juhn-Jong
PY - 2010/9/17
Y1 - 2010/9/17
N2 - We have measured the resistivities and Hall coefficients, RH, of a series of nonmagnetic Mox(SnO2)1-x nanogranular films with the Mo volume fraction x ranging from ∼0.29 to 1. We found that the magnitude of RH (2 K) largely increased by a factor of ∼800 as x was reduced from ∼0.8 to ≃0.36. Then, it slightly decreased with a further decrease in x down to ≃0.32, which was determined to be the classical percolation threshold, xc, from the resistivity dependence on x. This nearly 3 orders of magnitude enhancement in RH at a metal volume fraction x> xc is explained in terms of the recent theoretical concept of the local quantum-interference effect induced giant Hall effect in granular systems.
AB - We have measured the resistivities and Hall coefficients, RH, of a series of nonmagnetic Mox(SnO2)1-x nanogranular films with the Mo volume fraction x ranging from ∼0.29 to 1. We found that the magnitude of RH (2 K) largely increased by a factor of ∼800 as x was reduced from ∼0.8 to ≃0.36. Then, it slightly decreased with a further decrease in x down to ≃0.32, which was determined to be the classical percolation threshold, xc, from the resistivity dependence on x. This nearly 3 orders of magnitude enhancement in RH at a metal volume fraction x> xc is explained in terms of the recent theoretical concept of the local quantum-interference effect induced giant Hall effect in granular systems.
UR - http://www.scopus.com/inward/record.url?scp=77957557129&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.82.092202
DO - 10.1103/PhysRevB.82.092202
M3 - Article
AN - SCOPUS:77957557129
SN - 1098-0121
VL - 82
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 092202
ER -