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Updated: Jul 15, 2026
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Competing ferromagnetism in high-temperature copper oxide superconductors
Angela Kopp1, Amit Ghosal, Sudip Chakravarty
1Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA.
Summary
Competing ferromagnetic fluctuations explain puzzles in the overdoped cuprate superconductors. This suggests a quantum critical point leading to a ferromagnetic phase, crucial for understanding high-temperature superconductivity.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- The phase diagram of cuprate high-temperature superconductors exhibits extreme variability, particularly the superconducting dome, lacking a clear explanation.
- The overdoped regime of cuprates presents unique puzzles, including apparent Landau Fermi liquid behavior despite the absence of Mott phenomena and the presence of ferromagnetic spin susceptibility.
Purpose of the Study:
- To resolve the puzzling phenomenology observed in the overdoped regime of cuprate superconductors.
- To propose a theoretical framework explaining the termination of the superconducting dome and its relation to competing magnetic orders.
Main Methods:
- Theoretical analysis of competing ferromagnetic fluctuations alongside superconductivity.
- Justification of the proposed model based on experimental observations in cuprates.
Main Results:
- Demonstrated that competing ferromagnetic fluctuations resolve key puzzles in the overdoped regime.
- Identified the termination of the superconducting dome as a quantum critical point leading to a ferromagnetic phase.
Conclusions:
- Competing order, specifically ferromagnetic fluctuations, is central to the complexity of the cuprate phase diagram.
- Further experimental investigation of the overdoped regime is essential for solving the high-temperature superconductivity problem.
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