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Updated: Jun 10, 2025
08:12
Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
Published on: December 5, 2015
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Superconductivity and Mott Physics in Organic Charge Transfer Materials.
Henri Menke1,2, Marcel Klett1, Kazushi Kanoda1,3,4
1<a href="https://ror.org/005bk2339">Max-Planck-Institut für Festkörperforschung</a>, Heisenbergstraße 1, 70569 Stuttgart, Germany.
Physical Review Letters
|October 11, 2024
Summary
Strong electron correlations in organic superconductors lead to complex phenomena. Our study reveals unconventional superconductivity and a pseudogap in a minimal model, matching experimental organic superconductor phase diagrams.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Mechanics
Background:
- Quasi two-dimensional organic superconductors exhibit complex phase diagrams.
- These materials show phenomena like unconventional superconductivity, metal-insulator transitions, and spin liquid behavior due to strong electron correlations.
Purpose of the Study:
- To analyze the Hubbard model on an anisotropic triangular lattice, a minimal model for organic superconductors.
- To investigate the emergence of unconventional superconductivity and associated phenomena in these systems.
Main Methods:
- Utilized advanced quantum embedding methods that preserve lattice symmetry.
- Directly entered the symmetry-broken phase to demonstrate superconductivity.
Main Results:
- Confirmed the existence of unconventional superconductivity.
- Showed that the transition from a Fermi liquid metal to a Mott insulator involves pseudogap formation.
- Predicted momentum-selective destruction of the Fermi surface into distinct hot and cold regions.
Conclusions:
- The theoretical model accurately reproduces experimental phase diagrams of organic superconductors like κ-BEDT organics.
- The findings provide insights into the fundamental physics of strongly correlated electron systems.
- The predicted spectroscopic signatures motivate further experimental investigations.
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