Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals<xref rid="cpb_27_8_086301_fn1" ref-type="fn">*</xref><fn id="cpb_27_8_086301_fn1"><label>*</label><p>Project supported by the Major Program of Aerospace Advanced Manufacturing Technology Research Foundation from NSFC and CASC, China (Grant No. U1537204), the National Key Research and Development Program of China (Grant No. 2017YFA0206301), and the National Natural Science Foundation of China (Grant No. 51702146).</p></fn>

Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals**

Project supported by the Major Program of Aerospace Advanced Manufacturing Technology Research Foundation from NSFC and CASC, China (Grant No. U1537204), the National Key Research and Development Program of China (Grant No. 2017YFA0206301), and the National Natural Science Foundation of China (Grant No. 51702146).

Hu Gan^{1, 2}, Huang Jian-Qi^{1, 2}, Wang Ya-Ning^{1, 2}, Yang Teng^{1, 2, †}, Dong Bao-Juan^{1, 2}, Wang Ji-Zhang^{1, 2}, Zhao Bo³, Ali Sajjad^{1, 2}, Zhang Zhi-Dong^{1, 2}

(color online) (a) Phonon dispersion relation of monolayer and bulk InI crystal. BZ with the high-symmetry points is shown. (b) Visualization of typical in-plane B_g mode and out-of-plane A_g mode of monolayer, bilayer, trilayer and bulk InI.