Speaker
Description
Muon spin relaxation has been very successfully used to observe the dynamics in a range of materials, and electronic dynamics typically manifest themselves by showing a muon spin relaxation function which decays exponentially with time, with the rate of decay being related to the field autocorrelation function which can then be used to extract the dynamical parameters of the system [1]. However, there are many systems where the µSR spectrum decays in a way which deviates from a simple exponential model and often the experimenter has to resort to a phenomenological stretched exponential function to model the muon relaxation. In this poster, I show how a muon entangled with its nearest-neighbour nuclear spin in a fluctuating field gives rise to a relaxation which departs from a simple exponential decay, which has consequences for measuring dynamics with µSR when the nuclei have non-negligible moments.
[1] T. McMullen and E. Zaremba, Phys. Rev. B 18, 3026 (1978).
| john.wilkinson@stfc.ac.uk | |
| Funding Agency | STFC |
| Did you request an Invitation Letter for a Visitors Visa Application | No |
