Surface barrier dominated transport inNbSe2

Y. Paltiel, D. T. Fuchs, E. Zeldov, Y. N. Myasoedov, H. Shtrikman, M. L. Rappaport, E. Y. Andrei
1998 Physical Review B (Condensed Matter)  
Transport current distribution in clean 2H-NbSe_2 crystals is studied by measuring the self-induced magnetic field across the sample. Below T_c most of the current flows at the edges of the crystals due to strong surface barriers, which are found to dominate the transport properties and the resistive transition. The measured critical current is determined by the critical current for vortex penetration through the surface barrier rather than by bulk pinning.
doi:10.1103/physrevb.58.r14763 fatcat:cs7xu6mwpvgxpole2hkvcro7ta