English

Gauge Theory Pairing and Spin Fluctuations Near the Quantum Critical Point

Strongly Correlated Electrons 2007-05-23 v1

Abstract

We develop a new theory of pairing and magnetic spin fluctuation effect near the quantum critical point. Several novel properties are predicted: 1) based on a spin fermion model, we derive two new interactions, a) a spin deformational potential HsdpH_{sdp} proportional to the bandwidth WW (as opposed to the considerably smaller exchange coupling JJ of the nearly antiferromagnetic Fermi liquid theory) and b) a diamagnetic potential HdiaH_{dia}, quadratic in a gauge potential A\vec{A}. A dramatic increase of TCT_C is predicted for 0.01WJ10W0.01 W\leq J\leq 10 W. This should have immense technological impact in electric energy production, storage and transmission, as well as for medical electronics, microwave electronics, computer memory and information storage, separations technology and maglev, amongst others. The striking prediction to be confirmed by experiment is that the pairing order parameter Δ(k)\Delta(\vec{k}) is predicted to be pp-wave, i.e., l=1l=1, S=1, as compared to l=2l=2 and S=1 for conventional HTS materials. In addition a novel collective model is predicted whose frequency, ωL\omega_L is in the optical range and is determined by HsdpH_{sdp}.

Keywords

Cite

@article{arxiv.cond-mat/0406200,
  title  = {Gauge Theory Pairing and Spin Fluctuations Near the Quantum Critical Point},
  author = {J. R. Schrieffer},
  journal= {arXiv preprint arXiv:cond-mat/0406200},
  year   = {2007}
}