Title :
Selective THz excitation of collective modes in underdoped YBCO
Author :
Dakovski, Georgi L. ; Wei-Sheng Lee ; Turner, Joshua J. ; Hoffmann, Matthias C.
Author_Institution :
SLAC Nat. Accel. Lab., Menlo Park, CA, USA
Abstract :
We use intense broadband THz pulses to excite underdoped YBCO exhibiting competing superconducting and charge density wave ground states. We observe pronounced coherent oscillations at 1.85 and 2.65THz, attributed to renormalized low-energy phonon modes.
Keywords :
barium compounds; charge density waves; excited states; high-temperature superconductors; phonons; type II superconductors; yttrium compounds; YBCO; charge density wave ground states; coherent oscillations; collective modes; intense broadband THz pulses; low-energy phonon modes; selective THz excitation; superconducting ground states; underdoped YBCO; Broadband communication; Optical pumping; Optical reflection; Oscillators; Phonons; Reflectivity; Yttrium barium copper oxide;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
