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It underlies fertile spin transport phenomena and is of crucial importance for spintronics. Here, we observe the spin texture in k-space of nominally centrosymmetric SrIrO3 grown on NdGaO3 (110) substrates, using non-linear magnetotransport measurements. We demonstrate that the spin texture is not only induced by the interface, which inherently breaks the inversion symmetry in strong spin\u2013orbit coupled SrIrO3 films, but also originates from the film bulk. Structural analysis reveals that thicker SrIrO3 films exhibit a strain gradient, which could be considered as a continuous change in the lattice constant across different layers and breaks the inversion symmetry throughout the entire SrIrO3 films, giving rise to the spin texture in k-space. First-principles calculations reveal that the strain gradient creates large spin-splitting bands, inducing the spin texture with anisotropy, which is consistent with our experimental observations. Our results offer an efficient method for inducing the spin textures in k-space.<\/jats:p>","DOI":"10.1093\/nsr\/nwad296","type":"journal-article","created":{"date-parts":[[2023,11,20]],"date-time":"2023-11-20T22:58:57Z","timestamp":1700521137000},"source":"Crossref","is-referenced-by-count":4,"title":["Momentum-space spin texture induced by strain gradient in nominally centrosymmetric SrIrO3 films"],"prefix":"10.1093","volume":"11","author":[{"given":"Minghui","family":"Gu","sequence":"first","affiliation":[{"name":"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing 100190 ,","place":["China"]},{"name":"School of Physical Sciences, University of Chinese Academy of Sciences , Beijing 100190 ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haohao","family":"Sheng","sequence":"additional","affiliation":[{"name":"Beijing National Laboratory for Condensed Matter Physics and Institute 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