Reply to: On the ferroelectricity of CH₃NH₃PbI₃ perovskites

Affiliations

• ¹ Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
• ² Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, USA.
• ³ Asylum Research an Oxford Instruments Company, Santa Barbara, CA, USA.
• ⁴ School of Mechanical Engineering, Pusan National University, Busan, South Korea.
• ⁵ Department of Chemistry, University of Tennessee, Knoxville, TN, USA.
• ⁶ Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
• ⁷ Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
• ⁸ Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA. ovchinnikovo@ornl.gov.