Electrostatic modification of the conductive properties of amorphous Bi ultrathin films

K. H. Sarwa, B. Tan, Kevin Parendo, Yen Hsiang Lin, A. M. Goldman

Research output: Contribution to journalArticlepeer-review


The application of the field-effect transistor principle to novel materials to achieve electrostatic doping is a relatively new research area with roots that go back to the turn of the 20th century. The technique in principle provides the opportunity to modify the electronic and magnetic properties of materials through controlled and reversible changes in carrier concentration, without altering the degree of disorder or the chemical composition. Electrostatic doping can also serve as a tool for studying quantum critical behavior, by allowing the ground state of a system to be tuned in a controlled fashion. This is precisely what has been done in tuning the transition between insulating and superconducting ground states of ultrathin films of amorphous bismuth.

Original languageEnglish (US)
Pages (from-to)299-303
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number4
StatePublished - Feb 15 2008


  • 74.40.+k
  • Electrostatic charging
  • Quantum criticality
  • Superconductor-insulator transitions

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