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Cited by 141Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides

Optically induced superconductivity in stripedLa2−xBaxCuO4by polarization-selective excitation in the near infrared

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Nicoletti, D., Casandruc, E., Laplace, Y., Khanna, V., Hunt, C. R., Kaiser, S., Dhesi, S. S., Gu, G. D. +2 more·2014·Physical Review B
DOI 10.1103/physrevb.90.100503
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Abstract

We show that superconducting interlayer coupling, which coexists with and is depressed by stripe order in ${\mathrm{La}}_{1.885}{\mathrm{Ba}}_{0.115}{\mathrm{CuO}}_{4}$, can be enhanced by excitation with near-infrared laser pulses. For temperatures lower than ${T}_{c}=13$ K, we observe a blue shift of the equilibrium Josephson plasma resonance, detected by terahertz-frequency reflectivity measurements. Key to this measurement is the ability to probe the optical properties at frequencies as low as 150 GHz, detecting the weak interlayer coupling strengths. For $T>{T}_{c}$ a similar plasma resonance, absent at equilibrium, is induced up to the spin-ordering temperature ${T}_{\mathrm{SO}}\ensuremath{\simeq}40$ K. These effects are reminiscent but qualitatively different from the light-induced superconductivity observed by resonant phonon excitation in ${\mathrm{La}}_{1.675}{\mathrm{Eu}}_{0.2}{\mathrm{Sr}}_{0.125}{\mathrm{CuO}}_{6.5}$. Importantly, enhancement of the below-${T}_{c}$ interlayer coupling and its appearance above ${T}_{c}$ are preferentially achieved when the near-infrared pump light is polarized perpendicular to the superconducting planes, likely due to more effective melting of stripe order and the less effective excitation of quasiparticles from the Cooper pair condensate when compared to in-plane excitation.

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  • The slope observed by Liu et al. [15] is about a factor of two larger than that observed by Kaiser et al. [14] on the same material and at the same temperature.

    “The slope observed by Liu et al. [15] is about a factor of two larger than that observed by Kaiser et al. [14] on the same material and at the same temperature.”

    From Optical Saturation Produces Spurious Evidence for Photoinduced Superconductivity in K 3 C 60 (2023) · cites this paper as [14]

    Figure 4 (p. 100503-6) presents frequency-dependent optical conductivity for La₁.₈₈₅Ba₀.₁₁₅CuO₄ at 5 and 30 K, providing a measurement from which a slope could be assessed. The cited paper does not state a slope value or establish that Liu et al.’s slope is twice as large at the same temperature. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

  • When the measurements are represented as a function of fluence F = E0^2 τp / 2Z0, the slopes only differ by about 30%.

    “But the pump pulse duration τ p used by Liu et al. [15] was a factor of two larger than that used by Kaiser et al. [14], so when the measurements are represented as a function of fluence F = E 2 0 τ p / 2 Z 0 they only differ by about 30%, as shown in Fig. S4(b).”

    From Optical Saturation Produces Spurious Evidence for Photoinduced Superconductivity in K 3 C 60 (2023) · cites this paper as [14]

    The paper reports pump fluences in its Fig. 3 and Fig. 4 captions (p. 100503-6) and says the light-induced changes saturate with fluence. Our copy does not compare its measurements with Liu et al.’s, give the stated fluence conversion, or report slopes differing by about 30% (searched for pulse duration, fluence dependence, and the 30% comparison). (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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Authors
Nicoletti, D., Casandruc, E., Laplace, Y., Khanna, V., Hunt, C. R., Kaiser, S., Dhesi, S. S., Gu, G. D., Hill, J. P., & Cavalleri, A.
Affiliations
  • Max Planck Institute for the Structure and Dynamics of Matter (DE)
  • Diamond Light Source (GB)
  • University of Illinois Urbana-Champaign (US)
  • Brookhaven National Laboratory (US)
  • University of Oxford (GB)
ORCID
Venue
Physical Review B
Publisher
American Physical Society (APS)
Published
2014-09-10
Volume
90
Issue
10
ISSN
  • 1098-0121 (ISSN-L)
  • 1550-235X
DOI
10.1103/physrevb.90.100503
OpenAlex
W2066733518
Cited by
141
References
41
Citations by year
2026: 7 · 2025: 14 · 2024: 10 · 2023: 8 · 2022: 17 · 2021: 18 · 2020: 16 · 2019: 15 · 2018: 10 · 2017: 8 · 2016: 10 · 2015: 7 · 2014: 1
FWCI
5.61
Type
journal article
Language
en
Open access
Licence
Locations
  • Physical Review B (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Max Planck Digital Library (submittedVersion, other-oa)
  • DESY Publication Database (PUBDB) (Deutsches Elektronen-Synchrotron) (submittedVersion, other-oa)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
  • arXiv (Cornell University)
Funders
  • European Research Council (FP7/2007-2013, 319286)
  • Deutsche Forschungsgemeinschaft (DFG-SFB 925)
  • U.S. Department of Energy (DE-AC02-98CH10886)
Topics
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Magnetic and transport properties of perovskites and related materials
  • Physical Sciences › Materials Science › Materials Chemistry › Electronic and Structural Properties of Oxides
Keywords
light-induced superconductivity, La2-xBaxCuO4, interlayer coupling, Josephson plasma resonance, near-infrared laser excitation, terahertz reflectivity, spin ordering, high-temperature superconductors, quasiparticle excitations

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