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MA: Fachverband Magnetismus

MA 16: Spin Dynamics: Magnetic relaxation and Gilbert Damping

MA 16.5: Vortrag

Montag, 20. März 2017, 18:30–18:45, HSZ 401

Spin-lattice Relaxation of NV-Centers in Diamond — •Johannes Gugler and Peter Mohn — Center for Computational Materials Science TU Vienna

Nitrogen-Vacancy centers in Diamond exhibit a very long electronic spin-relaxation time T1. Thus, they are a promising candidate for solid-state qubit implementation. The temperature dependence of T1 at the mK-temperature scale was not understood up to now. We performed DFT-calculations to obtain the structural, electronic and phononic properties of the NV-center in Diamond to investigate on the spin-lattice relaxation rate. Using the numerically obtained wavefunctions we calculate the electron-phonon transition matrix element of first order time dependent perturbation theory. Taking into account spin-orbit coupling and the electronic screening of the electron-ion potential we obtain the right temperature dependence and order of magnitude for the experimentally found relaxation times.