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Interplay between relaxational atomic fluctuations and charge density waves in La2-xSrxCuO4

Shen, L. LU ; Esposito, V. ; Burdet, N. G. ; Zhu, M. ; Petsch, A. N. ; Croft, T. P. ; Collins, S. P. ; Ren, Z. LU ; Westermeier, F. and Sprung, M. , et al. (2023) In Physical Review B 108(20).
Abstract

In the cuprate superconductors, the spatial coherence of the charge density wave (CDW) state grows below a temperature TCDW, the origin of which is debated. Using x-ray photon correlation spectroscopy, we have studied the temporal atomic relaxation dynamics in La1.88Sr0.12CuO4 to shed light on this question. Cooling within an emergent structurally distorted phase, which favors the CDW modulation in symmetry and develops in two stages between 180 and 120 K, we observe a crossover from cooperativelike to incoherentlike relaxation dynamics at TCDW=75(10) K. We argue that, if the CDW is hosted by this distortion, the concomitant relaxational crossover and enhancement of CDW spatial coherence supports the interplay between relaxational... (More)

In the cuprate superconductors, the spatial coherence of the charge density wave (CDW) state grows below a temperature TCDW, the origin of which is debated. Using x-ray photon correlation spectroscopy, we have studied the temporal atomic relaxation dynamics in La1.88Sr0.12CuO4 to shed light on this question. Cooling within an emergent structurally distorted phase, which favors the CDW modulation in symmetry and develops in two stages between 180 and 120 K, we observe a crossover from cooperativelike to incoherentlike relaxation dynamics at TCDW=75(10) K. We argue that, if the CDW is hosted by this distortion, the concomitant relaxational crossover and enhancement of CDW spatial coherence supports the interplay between relaxational atomic fluctuations and CDWs in materials of this class on quasistatic times cales.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
108
issue
20
article number
L201111
publisher
American Physical Society
external identifiers
  • scopus:85177983625
ISSN
2469-9950
DOI
10.1103/PhysRevB.108.L201111
language
English
LU publication?
yes
id
1f3ab791-b9f2-4ac9-af91-e85cf5bf0a04
date added to LUP
2024-01-04 17:08:09
date last changed
2024-01-04 17:08:29
@article{1f3ab791-b9f2-4ac9-af91-e85cf5bf0a04,
  abstract     = {{<p>In the cuprate superconductors, the spatial coherence of the charge density wave (CDW) state grows below a temperature TCDW, the origin of which is debated. Using x-ray photon correlation spectroscopy, we have studied the temporal atomic relaxation dynamics in La1.88Sr0.12CuO4 to shed light on this question. Cooling within an emergent structurally distorted phase, which favors the CDW modulation in symmetry and develops in two stages between 180 and 120 K, we observe a crossover from cooperativelike to incoherentlike relaxation dynamics at TCDW=75(10) K. We argue that, if the CDW is hosted by this distortion, the concomitant relaxational crossover and enhancement of CDW spatial coherence supports the interplay between relaxational atomic fluctuations and CDWs in materials of this class on quasistatic times cales.</p>}},
  author       = {{Shen, L. and Esposito, V. and Burdet, N. G. and Zhu, M. and Petsch, A. N. and Croft, T. P. and Collins, S. P. and Ren, Z. and Westermeier, F. and Sprung, M. and Hayden, S. M. and Turner, J. J. and Blackburn, E.}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{11}},
  number       = {{20}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Interplay between relaxational atomic fluctuations and charge density waves in La2-xSrxCuO4}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.108.L201111}},
  doi          = {{10.1103/PhysRevB.108.L201111}},
  volume       = {{108}},
  year         = {{2023}},
}