New Superconductivity Mechanism via Chiral Electron-Hole Condensation
A new paper proposing a new superconductivity pairing mechanism has just been announced at arXiv.org. The paper’s title is “A new pairing mechanism via chiral electron-hole condensation in non-BCS superconductors“. The motivation for this work stems from the idea of staged chiral quark condensation developed in mirror matter theory.
The Nobel prize-winning Bardeen-Cooper-Schrieffer (BCS) theory of superconductivity, developed in the 1950s, falls short in explaining properties observed in various non-conventional superconductors, especially cuprates (discovered in the 1980s) and iron-based superconductors (discovered in 2006) with remarkably high critical temperatures. Despite decades of study, a comprehensive microscopic theory to account for non-BCS superconductivity remains elusive.
The proposed chiral electron-hole (CEH) pairing mechanism, presented as an alternative to conventional Cooper pairing in the BCS theory, aims to address these gaps in our understanding of non-conventional superconductivity. In particular, CEH provides a consistent framework to comprehend numerous puzzling properties observed in non-conventional superconductors, including antiferromagnetism, strong correlations, and unexpected behaviors related to the superconducting gap and heat capacity.
In contrast to the BCS theory, which is incompatible with magnetism and suitable only in weakly correlated systems, CEH naturally favors antiferromagnetism and thrives in strongly-correlated systems, characteristics prevalent in various non-conventional superconducting materials. Unlike Cooper pairs in BCS that conduct current through center-of-mass motion, CEH pairs conduct current through relative motion. Gap equations derived from this new mechanism present drastic differences from those in BCS. Detailed analysis and comparison with experimental data reveal remarkable agreement between CEH predictions and observed data, potentially solving various long-standing puzzles related to the superconducting gap and heat capacity.
Further measurements and systematic comparisons involving a broader range of materials will further test the CEH mechanism and foster its development. Guided by this new theory, we may discover even more promising high-temperature superconducting materials in the near future.
