English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Theory for Anomalous Terahertz Emission in Striped Cuprate Superconductors

Dolgirev, P. E., Michael, M. H., Curtis, J. B., Nicoletti, D., Buzzi, M., Fechner, M., et al. (2022). Theory for Anomalous Terahertz Emission in Striped Cuprate Superconductors.

Item is

Files

show Files
hide Files
:
2112.05772.pdf (Preprint), 2MB
Name:
2112.05772.pdf
Description:
Downloaded from arxiv.org: 2022-05-09
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2022
Copyright Info:
© the Author(s)

Locators

show
hide
Locator:
https://arxiv.org/abs/2112.05772 (Preprint)
Description:
-

Creators

show
hide
 Creators:
Dolgirev, P. E.1, Author
Michael, M. H.1, Author
Curtis, J. B.1, 2, Author
Nicoletti, D.3, Author              
Buzzi, M.3, Author              
Fechner, M.3, Author              
Cavalleri, A.3, 4, Author              
Demler, E.5, Author
Affiliations:
1Department of Physics, Harvard University, ou_persistent22              
2John A. Paulson School of Engineering and Applied Sciences, Harvard University, ou_persistent22              
3Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
4Clarendon Laboratory, University of Oxford, ou_persistent22              
5Institute for Theoretical Physics, ETH Zurich, ou_persistent22              

Content

show
hide
Free keywords: Condensed Matter, Superconductivity, cond-mat.supr-con, Condensed Matter, Strongly Correlated Electrons, cond-mat.str-el
 Abstract: Recent experiments in the doped cuprates La2−xBaxCuO4 have revealed the emission of anomalous terahertz radiation after impulsive optical excitation. The spectrum of this emission is sharply peaked in frequency at the Josephson plasma resonance. Notably, a prerequisite to this effect is that both superconducting and charge orders are present simultaneously. Here, we theoretically investigate the nonlinear electrodynamics of such striped superconductors and explore the origin of the observed radiation. We argue that photoexcitation is converted into a shift current by a second-order optical nonlinearity, which is activated by the breaking of inversion symmetry in certain stripe configurations. While such a low-frequency current impulsively drives both bulk and surface collective modes, we demonstrate that the observed emission is dominated by oscillations of the surface Josephson plasmon. Typically, surface excitations lie outside the light cone and are therefore silent; however, they can become bright due to the Bragg scattering off the charge order. We point out the importance of including Umklapp shift currents modulated at the stripe periodicity itself, which impulsively drive surface Josephson plasmons and lead to a resonant structure of outgoing radiation, consistent with the experiments.

Details

show
hide
Language(s): eng - English
 Dates: 2022-05-05
 Publication Status: Published online
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: arXiv: 2112.05772
 Degree: -

Event

show

Legal Case

show

Project information

show

Source

show