Nanoscale inhomogeneity of charge density waves dynamics in La2−xSrxNiO4
Abstract While stripe phases with broken rotational symmetry of charge density are known to emerge in doped strongly correlated perovskites, the dynamics and heterogeneity of spatial ordering remain elusive. Here we shed light on the temperature dependent lattice motion and the spatial nanoscale pha...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-09-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-18925-y |
| _version_ | 1811265118761123840 |
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| author | Gaetano Campi Antonio Bianconi Boby Joseph Shrawan Kr Mishra Leonard Müller Alexey Zozulya Agustinus Agung Nugroho Sujoy Roy Michael Sprung Alessandro Ricci |
| author_facet | Gaetano Campi Antonio Bianconi Boby Joseph Shrawan Kr Mishra Leonard Müller Alexey Zozulya Agustinus Agung Nugroho Sujoy Roy Michael Sprung Alessandro Ricci |
| author_sort | Gaetano Campi |
| collection | DOAJ |
| description | Abstract While stripe phases with broken rotational symmetry of charge density are known to emerge in doped strongly correlated perovskites, the dynamics and heterogeneity of spatial ordering remain elusive. Here we shed light on the temperature dependent lattice motion and the spatial nanoscale phase separation of charge density wave order in the archetypal striped phase in La2−xSrxNiO4+y (LSNO) perovskite using X-ray photon correlation spectroscopy (XPCS) joint with scanning micro X-ray diffraction (SµXRD). While it is known that the CDW in 1/8 doped cuprates shows a remarkable stability we report the CDW motion dynamics by XPCS in nickelates with an anomalous quantum glass regime at low temperature, T < 65 K, and the expected thermal melting at higher temperature 65 < T < 120 K. The nanoscale CDW puddles with a shorter correlation length are more mobile than CDW puddles with a longer correlation length. The direct imaging of nanoscale spatial inhomogeneity of CDW by scanning micro X-ray diffraction (SµXRD) shows a nanoscale landscape of percolating short range dynamic CDW puddles competing with large quasi-static CDW puddles giving rise to a novel form of nanoscale phase separation of the incommensurate stripes order landscape. |
| first_indexed | 2024-04-12T20:16:54Z |
| format | Article |
| id | doaj.art-312066573737435ab287026653e69581 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-12T20:16:54Z |
| publishDate | 2022-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-312066573737435ab287026653e695812022-12-22T03:18:05ZengNature PortfolioScientific Reports2045-23222022-09-011211810.1038/s41598-022-18925-yNanoscale inhomogeneity of charge density waves dynamics in La2−xSrxNiO4Gaetano Campi0Antonio Bianconi1Boby Joseph2Shrawan Kr Mishra3Leonard Müller4Alexey Zozulya5Agustinus Agung Nugroho6Sujoy Roy7Michael Sprung8Alessandro Ricci9Institute of Crystallography, CNRInstitute of Crystallography, CNRRome International Center Materials Science Superstripes (RICMASS)School of Materials Science and Technology, Indian Institute of Technology (BHU)Deutsches Elektronen-Synchrotron DESYDeutsches Elektronen-Synchrotron DESYFaculty of Mathematics and Natural Sciences, Institut Teknologi BandungAdvanced Light Source, Lawrence Berkeley National LaboratoryDeutsches Elektronen-Synchrotron DESYRome International Center Materials Science Superstripes (RICMASS)Abstract While stripe phases with broken rotational symmetry of charge density are known to emerge in doped strongly correlated perovskites, the dynamics and heterogeneity of spatial ordering remain elusive. Here we shed light on the temperature dependent lattice motion and the spatial nanoscale phase separation of charge density wave order in the archetypal striped phase in La2−xSrxNiO4+y (LSNO) perovskite using X-ray photon correlation spectroscopy (XPCS) joint with scanning micro X-ray diffraction (SµXRD). While it is known that the CDW in 1/8 doped cuprates shows a remarkable stability we report the CDW motion dynamics by XPCS in nickelates with an anomalous quantum glass regime at low temperature, T < 65 K, and the expected thermal melting at higher temperature 65 < T < 120 K. The nanoscale CDW puddles with a shorter correlation length are more mobile than CDW puddles with a longer correlation length. The direct imaging of nanoscale spatial inhomogeneity of CDW by scanning micro X-ray diffraction (SµXRD) shows a nanoscale landscape of percolating short range dynamic CDW puddles competing with large quasi-static CDW puddles giving rise to a novel form of nanoscale phase separation of the incommensurate stripes order landscape.https://doi.org/10.1038/s41598-022-18925-y |
| spellingShingle | Gaetano Campi Antonio Bianconi Boby Joseph Shrawan Kr Mishra Leonard Müller Alexey Zozulya Agustinus Agung Nugroho Sujoy Roy Michael Sprung Alessandro Ricci Nanoscale inhomogeneity of charge density waves dynamics in La2−xSrxNiO4 Scientific Reports |
| title | Nanoscale inhomogeneity of charge density waves dynamics in La2−xSrxNiO4 |
| title_full | Nanoscale inhomogeneity of charge density waves dynamics in La2−xSrxNiO4 |
| title_fullStr | Nanoscale inhomogeneity of charge density waves dynamics in La2−xSrxNiO4 |
| title_full_unstemmed | Nanoscale inhomogeneity of charge density waves dynamics in La2−xSrxNiO4 |
| title_short | Nanoscale inhomogeneity of charge density waves dynamics in La2−xSrxNiO4 |
| title_sort | nanoscale inhomogeneity of charge density waves dynamics in la2 xsrxnio4 |
| url | https://doi.org/10.1038/s41598-022-18925-y |
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