Abstract
We argue that nuclear-magnetic-resonance experiments are a site-sensitive probe for the electronic spectrum in the mixed state of the high- cuprates. Within a spin-fermion model, we show that the Doppler-shifted electronic spectrum arising from the circulating supercurrent changes the low-frequency behavior of the imaginary part of the spin susceptibility. For a hexagonal vortex lattice, we predict that these changes lead to (i) a unique dependence of the spin lattice relaxation rate, on resonance frequency, and (ii) a temperature dependence of which varies with frequency. We propose a nuclear quadrupole experiment to study the effects of a uniform supercurrent on the electronic structure and predict that varies with the direction of the supercurrent.
- Received 12 July 1999
DOI:https://doi.org/10.1103/PhysRevB.61.R882
©2000 American Physical Society