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Published on: August 2, 2019
Dynamical conductivity at the dirty superconductor-metal quantum phase transition
Adrian Del Maestro1, Bernd Rosenow, José A Hoyos
1Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
Physical Review Letters
|January 15, 2011
Summary
We investigated ultrathin disordered nanowires near a quantum phase transition. Our findings reveal unique conductivity scaling in the metallic phase, crucial for understanding quantum materials.
Area of Science:
- Condensed Matter Physics
- Quantum Materials Science
Background:
- Ultrathin disordered nanowires exhibit complex quantum phenomena.
- Superconductor-metal quantum phase transitions are critical points in material properties.
Purpose of the Study:
- To analyze the transport properties of ultrathin disordered nanowires.
- To investigate the behavior near the superconductor-metal quantum phase transition.
Main Methods:
- Combined numerical calculations.
- Employed analytical strong-disorder renormalization group techniques.
Main Results:
- Observed logarithmic divergence of quantum critical conductivity at zero temperature with frequency.
- Identified activated scaling in the metallic phase linked to infinite-randomness quantum critical points.
Conclusions:
- The study provides a theoretical framework for understanding transport in disordered superconductors.
- Results offer insights into experimental implications for quantum phase transitions.
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