Figure 3
From: U-shaped relationship between current and pitch in helicene molecules
(a–i) Transmission spectra of [12]helicene contacted with carbon chain electrodes under zero bias for different pitch d, which is denoted in the figure. For each case, the molecular orbital levels around the Fermi energy in the isolated molecule of [12]helicene are presented, i.e., HOMO, LUMO, HOMO-N and LUMO + N (N = 1, 2 and 3). The Fermi energy is set to be zero. Note that the transmission spectra are obtained under zero bias. We also calculate the spectra under other non-zero biases and only negligible changes are observed.
