Excitation of coherent oscillations in underdoped cuprate superconductors by intense THz pulses

Matthias C. Hoffmann; Wei-Sheng Lee; Georgi L. Dakovski; Joshua J. Turner; Simon M. Gerber; Doug Bonn; Walter Hardy; Ruixing Liang; Marco Salluzzo

doi:10.1117/12.2224993

13 May 2016 Excitation of coherent oscillations in underdoped cuprate superconductors by intense THz pulses

Matthias C. Hoffmann, Wei-Sheng Lee, Georgi L. Dakovski, Joshua J. Turner, Simon M. Gerber, Doug Bonn, Walter Hardy, Ruixing Liang, Marco Salluzzo

Author Affiliations +

Proceedings Volume 9835, Ultrafast Bandgap Photonics; 98351M (2016) https://doi.org/10.1117/12.2224993
Event: SPIE Defense + Security, 2016, Baltimore, MD, United States

Abstract

We use intense broadband THz pulses to excite the cuprate superconductors YBCO and NBCO in their underdoped phase, where superconducting and charge density wave ground states compete. We observe pronounced coherent oscillations at attributed to renormalized low-energy phonon modes. These oscillation features are much more prominent than those observed in all-optical pump-probe measurements, suggesting a different excitation mechanism.

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Matthias C. Hoffmann, Wei-Sheng Lee, Georgi L. Dakovski, Joshua J. Turner, Simon M. Gerber, Doug Bonn, Walter Hardy, Ruixing Liang, and Marco Salluzzo "Excitation of coherent oscillations in underdoped cuprate superconductors by intense THz pulses", Proc. SPIE 9835, Ultrafast Bandgap Photonics, 98351M (13 May 2016); https://doi.org/10.1117/12.2224993

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