<i>Ab initio</i> calculation of the spin lattice relaxation time <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>T</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math> for nitrogen-vacancy centers in diamond
Physical review. B./Physical review. B