تقرير
Dimensionality control and rotational symmetry breaking superconductivity in square-planar layered nickelates
| العنوان: | Dimensionality control and rotational symmetry breaking superconductivity in square-planar layered nickelates |
|---|---|
| المؤلفون: | Chow, Lin Er, Rubi, Km, Yip, King Yau, Pierre, Mathieu, Leroux, Maxime, Liu, Xinyou, Luo, Zhaoyang, Zeng, Shengwei, Li, Changjian, Goiran, Michel, Harrison, Neil, Escoffier, Walter, Goh, Swee Kuan, Ariando, A. |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | The interplay between dimensionality and various phases of matter is a central inquiry in condensed matter physics. New phases are often discovered through spontaneously broken symmetry. Understanding the dimensionality of superconductivity in the high-temperature cuprate analogue $-$ layered nickelates and revealing a new symmetry-breaking state are the keys to deciphering the underlying pairing mechanism. Here, we demonstrate the highly-tunable dimensionality and a broken rotational symmetry state in the superconductivity of square-planar layered nickelates. The superconducting state, probed by superconducting critical current and magnetoresistance within superconducting transition under direction-dependent in-plane magnetic fields, exhibits a $C_2$ rotational symmetry which breaks the $C_4$ rotational symmetry of the square-planar lattice. Furthermore, by performing detailed examination of the angular dependent upper critical fields at temperatures down to 0.5 K with high-magnetic pulsed-fields, we observe a crossover from two-dimensional to three-dimensional superconducting states which can be manipulated by the ionic size fluctuations in the rare-earth spacer layer. Such a large degree of controllability is desired for tailoring strongly two/three-dimensional superconductors and navigating various pairing landscapes for a better understanding of the correlation between reduced dimensionality and unconventional pairing. These results illuminate new directions to unravel the high-temperature superconducting pairing mechanism. Comment: 30 pages, 4 main figures, 8 extended data figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2301.07606 |
| رقم الأكسشن: | edsarx.2301.07606 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |