Jiangping Hu

Nov 6, 2024 | nature.com | Xiaoyang Chen |Zhicheng Jiang |Kun Jiang |Stefano Agrestini |Mirian García-Fernández |Dawei Shen | +4 more

AbstractHigh-temperature superconductivity was discovered in the pressurized nickelate La3Ni2O7 which has a unique bilayer structure and mixed valence state of nickel. The properties at ambient pressure contain crucial information of the fundamental interactions and bosons mediating superconducting pairing.

Oct 18, 2024 | nature.com | Anqi Wang |Tian Qian |Guangtong Liu |Fanming Qu |Kun Jiang |Zhijun Wang | +3 more

AbstractEdge states in topological systems have attracted great interest due to their robustness and linear dispersions. Here a superconducting-proximitized edge interferometer is engineered on a topological insulator Ta2Pd3Te5 with asymmetric edges to realize the interfering Josephson diode effect (JDE), which hosts many advantages, such as the high efficiency as much as 73% at tiny applied magnetic fields with an ultra-low switching power around picowatt.

Oct 2, 2024 | nature.com | Ningning Wang |Jun Luo |Yunqing Shi |Zhian Ren |Ziyi Liu |Yue Liu | +8 more

AbstractThe Ruddlesden–Popper (R–P) bilayer nickelate, La3Ni2O7, was recently found to show signatures of high-temperature superconductivity (HTSC) at pressures above 14 GPa (ref. 1). Subsequent investigations achieved zero resistance in single-crystalline and polycrystalline samples under hydrostatic pressure conditions2,3,4. Yet, obvious diamagnetic signals, the other hallmark of superconductors, are still lacking owing to the filamentary nature with low superconducting volume fraction2,4,5.

Sep 25, 2024 | link.aps.org | Pengfei Li |Kun Jiang |Jiangping Hu

Cooper pairs formed by two electrons with different effective masses are common in multiband superconductors, pair density wave states, and other superconducting systems with multiple degrees of freedom. In this paper, we show that there are paramagnetic contributions to the superfluid stiffness in superconductors with different-mass Cooper pairs. This paramagnetic response is owing to the relative motion between two electrons with different mass.