title: Switching Dielectric Constant Near Room Temperature in a Molecular Crystal.
abstract: The organic salt bis(2-chloroethyl)amine hydrochlorideshows a sharp switching of its dielectric constant at 320 K. The switching property originates from the dynamic changes of the (2-chloroethyl)ammonium cation between frozen and motional states, corresponding to a structural phase transition.
authors.affiliation: Ordered Matter Science Research Center Southeast University Nanjing 211189 Jiangsu China.
authors.forename: Xiu-Dan
authors.initials: XD
authors.lastname: Shao
authors.affiliation: Department of Physics and Shanghai Key Laboratory of Magnetic Resonance East China Normal University North Zhongshan Road 3663 Shanghai 200062 China.
authors.forename: Xi
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Ordered Matter Science Research Center Southeast University Nanjing 211189 Jiangsu China.
authors.forename: Chao
authors.initials: C
authors.lastname: Shi
authors.affiliation: Department of Physics and Shanghai Key Laboratory of Magnetic Resonance East China Normal University North Zhongshan Road 3663 Shanghai 200062 China.
authors.forename: Ye-Feng
authors.initials: YF
authors.lastname: Yao
authors.affiliation: Ordered Matter Science Research Center Southeast University Nanjing 211189 Jiangsu China.
authors.forename: Wen
authors.initials: W
authors.lastname: Zhang
keywords: dielectric constants; molecular crystals; phase transitions; rotational dynamics; switchable materials