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Tuning from failed superconductor to failed insulator with magnetic field
Yangmu Li1, J Terzic2, P G Baity2
1Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, NY 11973, USA.
Science Advances
|June 20, 2019
Summary
Charge modulations may compete with electron pairing in high-temperature superconductors. This study observed a reentrant superconducting phase and an ultraquantum metal phase in cuprates under high magnetic fields.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- High-temperature copper oxide superconductors exhibit complex electronic behaviors.
- Understanding the interplay between charge order and superconductivity is crucial for elucidating pairing mechanisms.
Purpose of the Study:
- To investigate the potential competition between charge modulations and electron pairing in cuprates.
- To explore the electronic phase diagram of stripe-ordered cuprates under extreme conditions.
Main Methods:
- Utilized high magnetic fields to suppress superconductivity in a stripe-ordered cuprate compound at low temperatures.
- Observed transitions between different electronic phases, including superconducting and metallic states.
Main Results:
- Loss of three-dimensional superconducting order was followed by reentrant two-dimensional superconductivity.
- An ultraquantum metal phase emerged at higher fields, showing evidence of being bosonic and linked to charge stripes.
Conclusions:
- The findings suggest that charge modulations might compete with, rather than solely support, electron pairing.
- Experimental results provide support for theories linking local segregation of charge and spin correlations to the pairing mechanism in cuprates.
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