Title :
THz phonon spectroscopy of doped bismuth cuprates
Author :
Khokhlov, D. ; Ponomarev, Ya. ; Pudalov, V. ; Mikheev, M. ; Sudakova, M. ; Tchesnokov, S.
Author_Institution :
Phys. Fac., Moscow State Univ., Moscow, Russia
Abstract :
THz phonon spectroscopy studies of Bi-2223 and Bi-2212 in a frequency range up to 25 THz are overviewed. The observed giant instability of I(V) - characteristics of Bi-2223 and Bi-2212 nanosteps is probably caused by emission of coherent 2Δ - optical phonons in a process of resonant recombination of nonequilibrium quasiparticles.
Keywords :
bismuth compounds; calcium compounds; high-temperature superconductors; phonon spectra; quasiparticles; strontium compounds; terahertz wave spectra; Bi-2212 nanostep; Bi-2223 nanostep; Bi2Ca2Sr2Cu3O8; Bi2Ca2SrCu2O7; coherent optical phonon emission; doped bismuth cuprates; giant instability; nonequilibrium quasiparticles; resonant recombination process; terahertz phonon spectroscopy; Biomedical optical imaging; Bismuth; Charge carrier processes; Doping; High-speed optical techniques; Optical sensors; Phonons;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956527
