最近看一本超導體的書,作者認為室溫或200k以上的超導體存在性微乎其微,但他沒有解釋。

究竟室溫或200k以上的超導體存在嗎?

存在是指理論上還是現實上？
現實上暫時未有

Not sure yet, but there has been a publication in 2008 which reports the high transition temperature of Al anionic nanoclusters around 200K. So, it may be possible that one day people can find superconductors whose Tc are close to RT.

Ref: Journal of Superconductivity and Novel Magnetism, Vol. 21, p.163-166 (2008)

請問超導材料變成零電阻的原理是什麼