Theoretical study on order–disorder phase transition of CH3NH3PbCl3<xref rid="cpb_28_11_116105fn1" ref-type="fn">*</xref><fn id="cpb_28_11_116105fn1"><label>*</label>Project supported by the National Natural Science Foundation of China (Grant Nos. 51572219, 51872227, 11204239, and 11447030), the Project of Natural Science Foundation of Shaanxi Province of China (Grant Nos. 2015JM1018, 2013JQ1018, 15JK1759, and 15JK1714), and the Science Foundation of Northwest University of China (Grant No. 12NW06).</fn>

Theoretical study on order–disorder phase transition of CH₃NH₃PbCl₃**

Project supported by the National Natural Science Foundation of China (Grant Nos. 51572219, 51872227, 11204239, and 11447030), the Project of Natural Science Foundation of Shaanxi Province of China (Grant Nos. 2015JM1018, 2013JQ1018, 15JK1759, and 15JK1714), and the Science Foundation of Northwest University of China (Grant No. 12NW06).

Chang Jing¹, Jiang Zhen-Yi^{1, 2, †}, Song Qi¹, Chen Lei¹, Lin Yan-Min¹, Zhou Bo¹

Potential energy differences of dipole interaction with different orientations, comparing with the parallel dipole.