Extended Data Fig. 6 | Pulse-height spectra of four other samples. a–h, Pulse-
height spectra are shown for electron (a–d) and hole (e–h) collection. The
growth conditions of these samples were the same as those used for the
samples that gave the spectra shown in the main-text figures. For hole
collection, the spectra had lower channel numbers than the electron-collection
spectra, indicating lower CCE for hole transport.