Magnetoresistance oscillations of ultrathin Pb bridges
Pb nanobridge, magnetoresistance, superconductivity, molecular beam epitaxy, scanning tunneling microscope, focus ion beam
Pb nanobridges with a thickness of less than 10 nm and a width of several hundred nm have been fabricated from single-crystalline Pb fi lms using low-temperature molecular beam epitaxy and focus ion beam microfabrication techniques. We observed novel magnetoresistance oscillations below the superconducting transition temperature (TC) of the bridges. The oscillations which were not seen in the crystalline Pb fi lms may originate from the inhomogeneity of superconductivity induced by the applied magnetic fi elds on approaching the normal state, or the degradation of fi lm quality by thermal evolution.
Tsinghua University Press
Jian Wang,Xucun Ma,Shuaihua Ji,Yun Qi,Yingshuang Fu,Aizi Jin,Li Lu,Changzhi Gu,X. C. Xie,Mingliang Tian,Jinfeng Jia,Qikun Xue, Magnetoresistance oscillations of ultrathin Pb bridges. NanoRes.2009, 2: 671-677