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Journal Article

Ultrafast Electronic Phase Transition in La1/2Sr3/2MnO4 by Coherent Vibrational Excitation: Evidence for Nonthermal Melting of Orbital Order

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http://dx.doi.org/10.1103/PhysRevLett.101.197404
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PhysRevLett.101.197404.pdf
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Citation

Tobey, R. I., Prabhakaran, D., Boothroyd, A. T., & Cavalleri, A. (2008). Ultrafast Electronic Phase Transition in La1/2Sr3/2MnO4 by Coherent Vibrational Excitation: Evidence for Nonthermal Melting of Orbital Order. Physical Review Letters, 101(19): 197404. doi:10.1103/PhysRevLett.101.197404.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0028-19B4-4
Abstract
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  μm 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.