Supplementary information

Figures S1 - S3. Derivation of the effective mass shown in eq. (28). Description of calculation of lattice mode frequencies for model β-sheet systems described in Section III: Theoretical Results. Description of how Raman activities were determined to compute Raman spectra.补充图S1至S3。式(28)所示有效质量的推导过程。第三节"理论结果"中所述模型β折叠（β-sheet）体系的晶格模式频率计算方法说明。用于拉曼光谱计算的拉曼活性确定方法说明。