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APA4ort.xyz Knowledge Graph. (2026). <i>a</i>-axis YBa2Cu3O7−<i>x</i>/PrBa2Cu3O7−<i>x</i>/YBa2Cu3O7−<i>x</i> trilayers with subnanometer rms roughness. Retrieved May 24, 2026, from https://4ort.xyz/entity/i-a-i-axis-yba2cu3o7-i-x-i-prba2cu3o7-i-x-i-yba2cu3o7-i-x-i-trilayers-with-subnanometer-rms-roughness