Magnetic resonance in defect spins mediated by spin waves
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-05-10 |
| Journal | Physical review. B./Physical review. B |
| Authors | Clara MĆ¼hlherr, V. O. Shkolnikov, Guido Burkard |
| Institutions | University of Konstanz |
| Citations | 19 |
Abstract
Section titled āAbstractāIn search of two level quantum systems that implement a qubit, the\nnitrogen-vacancy (NV) center in diamond has been intensively studied for years.\nDespite favorable properties such as remarkable defect spin coherence times,\nthe addressability of NV centers raises some technical issues. The coupling of\na single NV center to an external driving field is limited to short distances,\nsince an efficient coupling requires the NV to be separated by only a few\nmicrons away from the source. As a way to overcome this problem, an enhancement\nof coherent coupling between NV centers and a microwave field has recently been\nexperimentally demonstrated using spin waves propagating in an adjacent yttrium\niron garnet (YIG) film [1]. In this paper we analyze the optically detected\nmagnetic resonance spectra that arise when an NV center is placed on top of a\nYIG film for a geometry similar to the one in the experiment. We analytically\ncalculate the oscillating magnetic field of the spin wave on top of the YIG\nsurface to determine the coupling of spin waves to the NV center. We compare\nthis coupling to the case when the spin waves are absent and the NV center is\ndriven only with the antenna field and show that the calculated coupling\nenhancement is dramatic and agrees well with the one obtained in the recent\nexperiment.\n