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Spatially indirect intervalley excitons in bilayer <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">W</mml:mi><mml:msub><mml:mi>Se</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Spatially indirect intervalley excitons, with electrons and holes separate in both real and momentum space, represent an advantageous scenario for numerous theoretical and experimental advances. The authors demonstrate three types of spatially indirect intervalley excitons and their quantum confined Stark effects in bilayer WSe${}_{2}$. Their energy order and dominant luminescence …