# Quasiparticle Screening near a Bosonic Superconductor-Insulator Transition Revealed by Magnetic Impurity Doping.

@article{Zhang2019QuasiparticleSN,
title={Quasiparticle Screening near a Bosonic Superconductor-Insulator Transition Revealed by Magnetic Impurity Doping.},
author={Xue Zhang and James C Joy and Chunshu Wu and Jin Ho Kim and J. M. Xu and James M Valles},
journal={Physical review letters},
year={2019},
volume={122 15},
pages={
157002
}
}
• Published 27 June 2018
• Physics
• Physical review letters
Experiments show that the Cooper pair transport in the insulator phase that forms at thin film superconductor to insulator transitions (SIT) is simply activated. The activation energy T_{0} depends on the microscopic factors that drive Cooper pair localization. To test proposed models, we investigated how a perturbation that weakens Cooper pair binding, magnetic impurity doping, and phase frustration affects T_{0}. The data show that T_{0} decreases monotonically with doping in films tuned…
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## References

SHOWING 1-10 OF 51 REFERENCES

### Superconductor-Insulator Transition and Fermi-Bose Crossovers

• Physics
• 2015
The direct transition from an insulator to a superconductor (SC) in Fermi systems is a problem of long-standing interest, which necessarily goes beyond the standard BCS paradigm of superconductivity

### Localized superconductivity in the quantum-critical region of the disorder-driven superconductor-insulator transition in TiN thin films.

• Physics
Physical review letters
• 2007
Findings indicate the formation of a distinct collective state of the localized Cooper pairs in the critical region at both sides of the transition, evidencing a direct superconductor-insulator transition without an intermediate metallic phase.

### Cooper-pair insulator phase in superconducting amorphous Bi films induced by nanometer-scale thickness variations

• Physics
• 2011
Unusual transport properties of superconducting (SC) materials, such as the under doped cuprates, low dimensional superconductors in strong magnetic fields, and insulating films near the Insulator

### Collapse of the Cooper pair phase coherence length at a superconductor-to-insulator transition

• Physics
• 2013
We present investigations of the superconductor to insulator transition (SIT) of uniform a-Bi films using a technique sensitive to Cooper pair phase coherence. The films are perforated with a

### Magnetoresistance of an Anderson insulator of bosons.

• Physics
Physical review letters
• 2013
The magnetoresistance of two-dimensional bosonic Anderson insulators is studied using a simplified droplet model which incorporates the nontrivial DPRM exponents and describes the change in spatial decay of localized excitations in response to a magnetic field.

### Conductor Insulator Quantum Phase Transitions

• Physics
• 2012
PART I: METAL-INSULATOR TRANSITIONS 1. Introduction to Metal-Insulator Transitions 2. Anderson Localisation 3. Visualizing Critical Correlations near the Metal-Insulator Transition in Ga1??xMnxAs 4.

### Dynamical Conductivity Across The Disorder-Tuned Superconductor-Insulator Transition

• Physics
• 2013
A quantum phase transition is a dramatic event marked by large spatial and temporal fluctuations, where one phase of matter with its ground state and tower of excitations reorganizes into a

### Superconductor-insulator transition of Josephson-junction arrays on a honeycomb lattice in a magnetic field

Abstract We study the superconductor to insulator transition at zero temperature in a Josephson-junction array model on a honeycomb lattice with f flux quantum per plaquette. The path integral