Nonthermal Melting of Orbital Order in La1/2Sr3/2MnO4 by Coherent Excitation of a Mn-O Stretching Mode.

Autor: Tobey, Raanan I., Prabhakaran, Dharmalingam, Boothroyd, Andrew T., Cavalleri, Andrea
Zdroj: Ultrafast Phenomena Xvi; 2009, p182-184, 3p
Abstrakt: An ultrafast electronic phase transition, associated with melting of orbital order, is driven in La1/2Sr3/2MnO4 by selectively exciting the Mn-O stretching mode with femtosecond pulses at 16 mm wavelength. The energy coupled into this vibration is less than 1% of that necessary to induce the transition thermally. Nonthermal melting of this electronic phase originates from coherent lattice displacements comparable to the static Jahn-Teller distortion [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index