Tesař Roman, Šindler Michal, Kadlec Christelle, Lipavský Pavel, Skrbek Ladislav, Koláček Jan
Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 182 21 Prague 8, Czech Republic.
Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague 2, Czech Republic.
Sci Rep. 2021 Nov 5;11(1):21708. doi: 10.1038/s41598-021-00846-x.
For more than four decades, mass of Abrikosov vortices defied experimental observations. We demonstrate a method of its detection in high-temperature superconductors. Similarly to electrons, fluxons circulate in the direction given by the magnetic field, causing circular dichroism. We report the magneto-transmittance of a nearly optimally doped thin YBa[Formula: see text]Cu[Formula: see text]O[Formula: see text] film, measured using circularly polarized submillimeter waves. The circular dichroism emerges in the superconducting state and increases with dropping temperature. Our results confirm the dominant role of quasiparticle states in the vortex core and yield the diagonal fluxon mass of [Formula: see text] electron masses per centimeter at 45 K and zero-frequency limit, and even larger off-diagonal mass of [Formula: see text]/cm.
四十多年来，阿布里科索夫涡旋的质量一直无法通过实验观测到。我们展示了一种在高温超导体中检测它的方法。与电子类似，磁通子沿磁场给定的方向循环，从而产生圆二色性。我们报告了使用圆偏振亚毫米波测量的近最佳掺杂的薄YBa₂Cu₃O₇薄膜的磁透射率。圆二色性在超导态出现，并随温度降低而增加。我们的结果证实了准粒子态在涡旋核中的主导作用，并在45K和零频率极限下得出每厘米[具体公式]电子质量的对角磁通子质量，以及更大的非对角质量[具体公式]/cm。
