论文标题
在I型rhenium的超导状态下的量子元音扩散和时间反转对称性的保存
Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium
论文作者
论文摘要
先前据报道，表现出II型超导性的元素rhenium在超导状态下会打破时间反转的对称性。我们已经研究了一种表现出I型超导性的弧形样品。低温零场躯体自旋弛豫测量表明，时间反向对称性保留在超导状态。观察到若恩扩散，这是由于间质部位之间的量子机械隧穿引起的。正常状态的行为的特征是传导电子筛选兆子和热拓宽，并且是金属的典型特征。兆子捕获位点和超导能量差距之间的能量不对称也表征了超导状态的行为。
Elemental rhenium exhibiting type-II superconductivity has been previously reported to break time-reversal symmetry in the superconducting state. We have investigated an arc-melted sample of rhenium exhibiting type-I superconductivity. Low temperature zero-field muon-spin relaxation measurements indicate that time-reversal symmetry is preserved in the superconducting state. Muon diffusion is observed, which is due to quantum mechanical tunneling between interstitial sites. The normal state behavior is characterized by the conduction electrons screening the muons and thermal broadening, and is typical for a metal. Energy asymmetries between muon trapping sites and the superconducting energy gap also characterize the superconducting state behavior.
