Schedule Jun 09, 2004
Gauge Theory of Pairing and Spin Fluctuations Near the Quantum Critical Point
Robert Schrieffer (Florida State University)

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 Hsdp proportional to the bandwidth W (as opposed to the considerably smaller exchange coupling J of the nearly antiferromagnetic Fermi liquid theory) and b) a diamagnetic potential Hdia, quadratic in a gauge potential . A dramatic increase of TC is predicted for 0.01W 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 is predicted to be wave, i.e., =1, =1, as compared to =2 and =1 for conventional HTS materials. In addition a novel collective model is predicted whose frequency, is in the optical range and is determined by Hsdp. PACS numbers: 71.10.Ay, 71.10Pm.

Begin WebCam and audio for the whole talk: high bandwidth or medium bandwidth.
Or, begin audio only for the whole talk: high bandwidth or low bandwidth. (Or, right-click to download the whole audio file.)

Begin QuickTime of the whole talk (high bandwidth).

To begin viewing slides, click on the first slide below.

[01] [02] [03] [04] [05] [06]

Author entry (protected)