Nonlinear excess conductivity of Bi2Sr2Can-1CunO2n+4+x (n=1,2) thin films -: art. no. 144511

The suppression of excess conductivity with electric field is studied for Bi2Sr2Can-1CunO2n+4+x (n=1,2) thin films. A pulse-probe technique is used, which allows for an estimate of the sample temperature. The characteristic electric field for fluctuation suppression is found well below the expected value for all samples. For the n=1 material, a scaling of the excess conductivity with electric field and temperature is obtained, similar to the scaling under strong magnetic field.