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Spin Polarization in Single Spin Experiments on Defects in Diamond
Author(s) -
Popa Iulian,
Gaebel Thorsten,
Neumann Philipp,
Jelezko Fedor,
Wrachtrup Joerg
Publication year - 2007
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/ijc_46_4_393
Subject(s) - intersystem crossing , chemistry , spin polarization , triplet state , singlet state , spins , spin states , spin (aerodynamics) , condensed matter physics , paramagnetism , doublet state , polarization (electrochemistry) , diamond , atomic physics , spinplasmonics , zero field splitting , electron , physics , excited state , quantum mechanics , inorganic chemistry , organic chemistry , thermodynamics
Generation of pure spin states is an important step towards coherent control of single spin systems. Especially for nitrogen‐vacancy defects in diamond, where readout of single spins using optical detection is available, fast initialization of spin is significant in the context of quantum computing applications. In this system the spin polarization is caused by an intersystem crossing process via the meta‐stable singlet state 1A . The slowest relaxation rate is the intersystem to the triplet ground‐state 3A on a timescale of 400 ns. The intersystem crossing process mainly populates the ms = 0 spin sublevels of the paramagnetic ground state. Although no direct nuclear spin polarization is seen for low magnetic fields, frequency selective microwave pulses can be used to transfer electron spin polarization to 13 C nuclear spin states.