Campi, Gaetano ORCID: 0000-0001-9845-9394, Poccia, Nicola, Joseph, Boby ORCID: 0000-0002-3334-7540, Bianconi, Antonio ORCID: 0000-0001-9795-3913, Mishra, Shrawan, Lee, James, Roy, Sujoy, Nugroho, Agustinus Agung ORCID: 0000-0002-1785-4008, Buchholz, Marcel, Braden, Markus ORCID: 0000-0002-9284-6585, Trabant, Christoph, Zozulya, Alexey, Mueller, Leonard, Viefhaus, Jens, Schuessler-Langeheine, Christian, Sprung, Michael and Ricci, Alessandro (2019). Direct Visualization of Spatial Inhomogeneity of Spin Stripes Order in La1.72Sr0.28NiO4. Condens. Matter, 4 (3). BASEL: MDPI. ISSN 2410-3896

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Abstract

In several strongly correlated electron systems, the short range ordering of defects, charge and local lattice distortions are found to show complex inhomogeneous spatial distributions. There is growing evidence that such inhomogeneity plays a fundamental role in unique functionality of quantum complex materials. La1.72Sr0.28NiO4 is a prototypical strongly correlated perovskite showing spin stripes order. In this work we present the spatial distribution of the spin order inhomogeneity by applying micro X-ray diffraction to La1.72Sr0.28NiO4, mapping the spin-density-wave order below the 120 K onset temperature. We find that the spin-density-wave order shows the formation of nanoscale puddles with large spatial fluctuations. The nano-puddle density changes on the microscopic scale forming a multiscale phase separation extending from nanoscale to micron scale with scale-free distribution. Indeed spin-density-wave striped puddles are disconnected by spatial regions with negligible spin-density-wave order. The present work highlights the complex spatial nanoscale phase separation of spin stripes in nickelate perovskites and opens new perspectives of local spin order control by strain.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Campi, GaetanoUNSPECIFIEDorcid.org/0000-0001-9845-9394UNSPECIFIED
Poccia, NicolaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Joseph, BobyUNSPECIFIEDorcid.org/0000-0002-3334-7540UNSPECIFIED
Bianconi, AntonioUNSPECIFIEDorcid.org/0000-0001-9795-3913UNSPECIFIED
Mishra, ShrawanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, JamesUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Roy, SujoyUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nugroho, Agustinus AgungUNSPECIFIEDorcid.org/0000-0002-1785-4008UNSPECIFIED
Buchholz, MarcelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braden, MarkusUNSPECIFIEDorcid.org/0000-0002-9284-6585UNSPECIFIED
Trabant, ChristophUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zozulya, AlexeyUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mueller, LeonardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Viefhaus, JensUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schuessler-Langeheine, ChristianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sprung, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ricci, AlessandroUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-142461
DOI: 10.3390/condmat4030077
Journal or Publication Title: Condens. Matter
Volume: 4
Number: 3
Date: 2019
Publisher: MDPI
Place of Publication: BASEL
ISSN: 2410-3896
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
PHASE-TRANSITION; MAGNETIC ORDER; CHARGE STRIPES; LATTICE; SUPERCONDUCTIVITY; FLUCTUATIONS; TEMPERATURE; NANOSCALE; DISORDER; MODELMultiple languages
Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/14246

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