Spin-Singlet State to Spin-Triplet States (IMAGE)

DOE/Lawrence Berkeley National Laboratory

Spin-Singlet State to Spin-Triplet States

Caption

In this image, an optically excited spin-singlet state (red), which features electron-hole pairs, splits into a pair of spin-triplet states (blue). The individual triplets have equal and opposite center-of-mass momenta -- they behave like waves moving in opposite directions along a crystal. The gray and white spheres represent carbon and hydrogen atoms, respectively.

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Florian Brown-Altvater/Berkeley Lab

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