【摘要】 我们在云母（001）面上合成高质量的K₃C_?单晶薄膜。在正常态下它表现出金属性的电阻一温度的依赖关系,且符合关系式p（T）=a+bT²。单晶薄膜在22K附近具有很陡的超导转变,转变宽度（电阻值由90％到10％）小于700mK,零电阻温度为21K,连续直流测量出的临界电流密度高达50000A/cm²。更多还原

【Abstract】 We have synthesized high-quality single crystle K3C60 thin films on (001) mica substrates. The normal state shows a classical metallic dependence of R-T and it can be fit to the form of p (T)=a+bT2, where R is the electrical resistivity and T is the temperature. The film has a sharp transition to superconductivity near 22K, with a 10% to 90% width less than 700mK. The critical current density measured by continous dc current is as high as 50000A/cm2, thus shed a light on the potential practical use of this unique material, and the preliminary analysis indicate that Jcis proportional to 1- (T/Tc)3.更多还原