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¡°Ìú±¾ÖÊÉÏÐγÉÁËÒ»ÖÖ²»Í¬ÓÚ·°µÄ³¬µ¼ÀàÐÍ£¬¡±Žutić ˵µÀ£¬¡°»»¾ä»°Ëµ£¬ÕâЩ¡®ÊÐÃñ¡¯ÒÔ×Ô¼ºµÄ·½Ê½×éÖ¯ÆðÀ´£¬µ«ÒÀÈ»±£³ÖÁË×ã¹»µÄ½Ú×àÒ»ÖÂÐÔ£¬¼ÈÄÜÏñ¾ü¶ÓÒ»ÑùÐнø£¬ÓÖÄܰÑËûÃÇ×Ô¼ºµÄ½ÚÂÉ´«»ØºÓ¶Ô°¶¡£¡±
Mystery remains
The researchers are theorizing about how iron was able to make its same-spin electron pairs robust enough that it behaved as if it was an independent superconductor.

Still, they're excited that same-spin electron pairing could have implications for topological superconductors, which are more tolerant to environmental disturbance. Such superconductors protect quantum information¡ªoften tied to electron spin¡ªin a knot-like way, so disturbances to parts of the system don't easily unravel what's happening at the core.

"The problem with conventional quantum computers is that even small environmental changes can throw off the spin of their electrons. We want to find a way to essentially lock an electron's spin into place, and same-spin pairing could hold some answers," Žutić says.

Another potential advantage is that a Josephson junction could be made in the future with fairly ordinary materials¡ªboth iron and magnesium oxide are widely used in commercially available magnetic computer hard drives and magnetic random-access memory.

"We have added a superconducting twist to commercially viable devices," Žutić says.

More information: César González-Ruano et al, Giant shot noise in superconductor/ferromagnet junctions with orbital-symmetry- controlled spin-orbit coupling, Nature Communications (2025). DOI: 10.1038/s41467-025-64493-w

Journal information: Nature Communications
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