Physica C SuperconductivityObservation of zero-crossing steps in surface junctions of Bi2Sr2CaCu2O8+δ single crystalsYong‐Joo Doh, Jinhee Kim, Kyu-Tae Kim, Hu-Jong LeePublished Nov 1, 2000• 0 citationsPublisherDOI10.1016/s0921-4534(00)01341-1