Muonic atom as an acceptor centre in diamond

13th International Conference on Muon Spin Rotation, Relaxation and Resonance

Mamedov, T.N.^1 ; Baturin, A.S.^2 ; Gritsaj, K.I.^1 ; Maisuradze, A.^3,4 ; Ralchenko, V.G.^5 ; Scheuermann, R.^4 ; Sedlak, K.^4 ; Stoykov, A.V.^4

Joint Institute for Nuclear Research, Moscow reg., Dubna

141980, Russia^1

Moscow Institute of Physics and Technology, Dolgoprudny, Moscow reg.

141700, Russia^2

Physik-Institut der Universität Zürich, Winterthurerstrasse 190, Zürich

CH-8057, Switzerland^3

Paul Scherrer Institut, Villigen PSI

CH-8057, Switzerland^4

Natural Sciences Center of Institute of General Physics, RAS, Moscow

119991, Russia^5

关键词: Chemical vapour deposition;    Hyperfine interactions;    Muon spin relaxation;    Polarization amplitudes;    Spin precession frequency;    Temperature dependence;    Temperature increase;    Transverse magnetic field;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/551/1/012046/pdf
DOI  :  10.1088/1742-6596/551/1/012046

来源: IOP

【 摘 要 】

Polarized negative muons were used to study the behaviour of the boron acceptor centre in diamond produced by the chemical vapour deposition (CVD) method. The temperature dependence of the muon spin relaxation rate and spin precession frequency were measured in the range of 20-330 K in a transverse magnetic field of 14 kOe. The muon polarization amplitude P(t 0) does not depend on the temperature and the muon spin relaxation rate decreases as the temperature increases. For the first time a negative shift of the muon spin precession was observed in diamond. The measurements show that the magnetic susceptibility of the CVD sample is negligible (χ -4.13(2)·10-7cm3/g at 20 K) and it could not be the reason of the negative shift muon spin precession frequency. The negative shift of the muon spin precession frequency is tentatively attributed to an anisotropic hyperfine interaction in the boron acceptor in diamond.