TY  - JOUR
AU  - Kuzel, P.
AU  - Kadlec, C.
AU  - Kadlec, F.
AU  - Schubert, J.
AU  - Panaitov, G.
TI  - Field-induced soft mode hardening in SrTi03/DySc03 multilayers
JO  - Applied physics letters
VL  - 93
SN  - 0003-6951
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PreJuSER-62959
SP  - 052910-1 - 052910-3
PY  - 2008
N1  - Record converted from VDB: 12.11.2012
AB  - We investigate a SrTiO3/DyScO3 epitaxial multilayer with four 50-nm-thick layers of each compound deposited on DyScO3 substrate by pulsed laser deposition. The spectra of SrTiO3 obtained using time-domain terahertz spectroscopy at room temperature with and without electrical bias are explained by the ferroelectric soft mode coupled to a silent central peak, where the bare soft mode frequency is the only field-dependent parameter. We show that terahertz and subterahertz properties of the layers are determined solely by a tremendous hardening of the soft mode with increasing field. We demonstrate that our structure induces more than 40% modulation of the transmitted terahertz power in a broad frequency range of 0.65-1.15 THz at 140 V (93 kV/cm) bias.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000258335900057
DO  - DOI:10.1063/1.2967336
UR  - https://juser.fz-juelich.de/record/62959
ER  -