Research Article


2009, 2: 671-677


Magnetoresistance Oscillations of Ultrathin Pb Bridges

Jian Wang1, 2), Xucun Ma1, Shuaihua Ji1, Yun Qi1, Yingshuang Fu1, Aizi Jin1, Li Lu1, Changzhi Gu1, X. C. Xie1, 3, Mingliang Tian2, Jinfeng Jia1, 4, and Qikun Xue1, 4

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1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2 The Center for Nanoscale Science and Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802-6300, USA
3 Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA
4 Department of Physics, Tsinghua University, Beijing 100084, China

Keywords: Pb nanobridge, magnetoresistance, superconductivity, molecular beam epitaxy, scanning tunneling microscope, focus ion beam
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  • Abstract
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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.
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Magnetoresistance Oscillations of Ultrathin Pb Bridges. Nano Res. 2009, 2: 671-677

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