Coherent acoustic phonons in YBa2Cu3O7/La1/3Ca2/3MnO3 superlattices

Wei Li, Bin He, Chunfeng Zhang, Shenghua Liu, Xiaoran Liu, S. Middey, J. Chakhalian, Xiaoyong Wang, Min Xiao

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We investigate photo-induced coherent acoustic phonons in complex oxide superlattices consisting of high-Tc superconductor YBa2Cu3O7-x and ferromagnetic manganite La1/3Ca2/3MnO3 epitaxial layers with broadband pump-probe spectroscopy. Two oscillatory components have been observed in time-resolved differential reflectivity spectra. Based on the analysis, the slow oscillation mode with a frequency sensitive to the probe wavelength is ascribed to the stimulated Brillouin scattering due to the photon reflection by propagating train of coherent phonons. The fast oscillation mode with a probe-wavelength-insensitive frequency is attributed to the Bragg oscillations caused by specular phonon reflections at oxide interfaces or the electron-coupling induced modulation due to free carrier absorption in the metallic superlattices. Our findings suggest that oxide superlattice is an ideal system to tailor the coherent behaviors of acoustic phonons and to manipulate the thermal and acoustic properties.

Original languageEnglish (US)
Article number132601
JournalApplied Physics Letters
Issue number13
StatePublished - Mar 28 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Coherent acoustic phonons in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>/La<sub>1/3</sub>Ca<sub>2/3</sub>MnO<sub>3</sub> superlattices'. Together they form a unique fingerprint.

Cite this