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Title: Probing optically silent superfluid stripes in cuprates

Abstract

Unconventional superconductivity in the cuprates coexists with other types of electronic order. However, some of these orders are invisible to most experimental probes because of their symmetry. For example, the possible existence of superfluid stripes is not easily validated with linear optics, because the stripe alignment causes interlayer superconducting tunneling to vanish on average. In this paper, we show that this frustration is removed in the nonlinear optical response. A giant terahertz third harmonic, characteristic of nonlinear Josephson tunneling, is observed in La1.885Ba0.115CuO4 above the transition temperature Tc = 13 kelvin and up to the charge-ordering temperature Tco = 55 kelvin. We model these results by hypothesizing the presence of a pair density wave condensate, in which nonlinear mixing of optically silent tunneling modes drives large dipole-carrying supercurrents.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [1]; ORCiD logo [3];  [3]; ORCiD logo [4]
  1. Max Planck Inst. of Structure and Dynamics of Matter, Hamburg (Germany)
  2. Univ. of Hamburg (Germany). Centre for Optical Quantum Technologies and Inst. for Laser Physics
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  4. Max Planck Inst. of Structure and Dynamics of Matter, Hamburg (Germany); Univ. of Oxford (United Kingdom). Clarendon Lab. and Dept. of Physics
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; European Research Council (ERC); Max Planck Inst. of Structure and Dynamics of Matter, Hamburg (Germany)
OSTI Identifier:
1430866
Report Number(s):
BNL-203410-2018-JAAM
Journal ID: ISSN 0036-8075
Grant/Contract Number:  
SC0012704; 319286; AC02-98CH10886
Resource Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 359; Journal Issue: 6375; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Rajasekaran, S., Okamoto, J., Mathey, L., Fechner, M., Thampy, V., Gu, G. D., and Cavalleri, A. Probing optically silent superfluid stripes in cuprates. United States: N. p., 2018. Web. doi:10.1126/science.aan3438.
Rajasekaran, S., Okamoto, J., Mathey, L., Fechner, M., Thampy, V., Gu, G. D., & Cavalleri, A. Probing optically silent superfluid stripes in cuprates. United States. doi:10.1126/science.aan3438.
Rajasekaran, S., Okamoto, J., Mathey, L., Fechner, M., Thampy, V., Gu, G. D., and Cavalleri, A. Fri . "Probing optically silent superfluid stripes in cuprates". United States. doi:10.1126/science.aan3438. https://www.osti.gov/servlets/purl/1430866.
@article{osti_1430866,
title = {Probing optically silent superfluid stripes in cuprates},
author = {Rajasekaran, S. and Okamoto, J. and Mathey, L. and Fechner, M. and Thampy, V. and Gu, G. D. and Cavalleri, A.},
abstractNote = {Unconventional superconductivity in the cuprates coexists with other types of electronic order. However, some of these orders are invisible to most experimental probes because of their symmetry. For example, the possible existence of superfluid stripes is not easily validated with linear optics, because the stripe alignment causes interlayer superconducting tunneling to vanish on average. In this paper, we show that this frustration is removed in the nonlinear optical response. A giant terahertz third harmonic, characteristic of nonlinear Josephson tunneling, is observed in La1.885Ba0.115CuO4 above the transition temperature Tc = 13 kelvin and up to the charge-ordering temperature Tco = 55 kelvin. We model these results by hypothesizing the presence of a pair density wave condensate, in which nonlinear mixing of optically silent tunneling modes drives large dipole-carrying supercurrents.},
doi = {10.1126/science.aan3438},
journal = {Science},
number = 6375,
volume = 359,
place = {United States},
year = {2018},
month = {2}
}

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Cited by: 8 works
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Figures / Tables:

Figure 1 Figure 1: Phase diagram for La2-xBaxCuO4 as adapted from M. Hücker, et al. Phys. Rev. B 83, 104506 (2011)3. The crystals studied here belong to the same batch of samples as those used in reference 3. SC, SO and CO denote the bulk superconducting, spin and charge ordered (striped), andmore » charge-only ordered phases, respectively. Tsc, Tso and Tco are the corresponding ordering temperatures. TLT denotes the orthorhombic to tetragonal structural transition temperature. The samples examined in this study are x = 9.5 % and x = 11.5 %.« less

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    Works referencing / citing this record:

    Hard antinodal gap revealed by quantum oscillations in the pseudogap regime of underdoped high-Tc superconductors
    journal, May 2020