Suppression of the Optical Linewidth and Spin Decoherence of a Quantum Spin Center in a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mi>p</mml:mi></mml:math> - <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mi>n</mml:mi></mml:math> Diode
PRX quantum