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Ultrafast electronic phase transition in La1/2Sr3/2MnO4 by coherent vibrational excitation: evidence for nonthermal melting of orbital order.

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 microm 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.
Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
Journal:
Physical review letters
Volume:
101
Issue:
19
Pages:
197404
Publication date:
2008-11-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:a3dfaa33-349b-4f2b-a906-1b54c02f8ee6
Source identifiers:
17602
Local pid:
pubs:17602
Language:
English

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