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Related Experiment Videos

Superconductivity-related insulating behavior.

G Sambandamurthy1, L W Engel, A Johansson

  • 1Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100, Israel.

Physical Review Letters
|April 20, 2004
PubMed
Summary
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We studied amorphous indium oxide films and found that a magnetic field can induce an insulating state. This insulating state

Area of Science:

  • Condensed matter physics
  • Materials science

Background:

  • Superconducting materials exhibit zero electrical resistance below a critical temperature.
  • Disordered thin films present unique electronic properties.
  • Amorphous indium oxide is a material exhibiting superconductivity.

Purpose of the Study:

  • To investigate the behavior of superconducting, disordered, thin films of amorphous indium oxide under a perpendicular magnetic field.
  • To explore the transition from a superconducting to an insulating state.
  • To understand the relationship between conduction mechanisms in different phases.

Main Methods:

  • Experimental study of amorphous indium oxide thin films.
  • Application of perpendicular magnetic fields to induce phase transitions.

Related Experiment Videos

  • Measurement of transport properties in superconducting and insulating states.

    • Main Results:

    • Superconducting films transition to a reentrant insulating state under a magnetic field (B).
    • The high-B insulator shows activated transport with a characteristic temperature, T_I.
    • T_I's maximum value (T_pI) is near the superconducting transition temperature (T_c) at B=0.
    • T_pI and T_c show opposite dependencies on disorder strength.

    Conclusions:

    • A potential link exists between conduction mechanisms in the superconducting and insulating phases.
    • Disorder strength significantly influences the superconducting and insulating properties.