Superprotonic conduction in the LiH 2PO 4 (LDP) system has been studied by means of impedance spectroscopy. A dielectric dispersion associated with room-temperature superionic conduction is manifested, as the temperature-dependent dielectric constant displays a broad peak shifting toward the high temperatures with increasing measuring frequency. In particular, our impedance spectroscopic analysis in distinct temperature ranges has revealed the evolution of the microscopic proton dynamics and inhomogeneous electric environments associated with the dynamics of the two distinct hydrogen-bond types in LDP.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (Cyclotron Users Program 2012029495 and NRL Program 2012-0006259). The measurements at the Korean Basic Science Institute (KBSI) are gratefully acknowledged.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)