Research Article

Nano Research

, Volume 2, Issue 9, pp 671-677

Open Access This content is freely available online to anyone, anywhere at any time.

Magnetoresistance oscillations of ultrathin Pb bridges

  • Jian WangAffiliated withInstitute of Physics, Chinese Academy of SciencesThe Center for Nanoscale Science and Department of Physics, The Pennsylvania State University Email author 
  • , Xucun MaAffiliated withInstitute of Physics, Chinese Academy of Sciences
  • , Shuaihua JiAffiliated withInstitute of Physics, Chinese Academy of Sciences
  • , Yun QiAffiliated withInstitute of Physics, Chinese Academy of Sciences
  • , Yingshuang FuAffiliated withInstitute of Physics, Chinese Academy of Sciences
  • , Aizi JinAffiliated withInstitute of Physics, Chinese Academy of Sciences
  • , Li LuAffiliated withInstitute of Physics, Chinese Academy of Sciences
  • , Changzhi GuAffiliated withInstitute of Physics, Chinese Academy of Sciences
  • , X. C. XieAffiliated withInstitute of Physics, Chinese Academy of SciencesDepartment of Physics, Oklahoma State University
    • , Mingliang TianAffiliated withThe Center for Nanoscale Science and Department of Physics, The Pennsylvania State University
    • , Jinfeng JiaAffiliated withInstitute of Physics, Chinese Academy of SciencesDepartment of Physics, Tsinghua University
    • , Qikun XueAffiliated withInstitute of Physics, Chinese Academy of SciencesDepartment of Physics, Tsinghua University Email author 

Abstract

Pb nanobridges with a thickness of less than 10 nm and a width of several hundred nm have been fabricated from single-crystalline Pb films using low-temperature molecular beam epitaxy and focus ion beam microfabrication techniques. We observed novel magnetoresistance oscillations below the superconducting transition temperature (T C ) of the bridges. The oscillations—which were not seen in the crystalline Pb films—may originate from the inhomogeneity of superconductivity induced by the applied magnetic fields on approaching the normal state, or the degradation of film quality by thermal evolution.

http://static-content.springer.com/image/art%3A10.1007%2Fs12274-009-9070-3/MediaObjects/12274_2009_9070_Fig1_HTML.jpg

Keywords

Pb nanobridge magnetoresistance superconductivity molecular beam epitaxy scanning tunneling microscope focus ion beam