论文标题
过渡金属二分法中的外在和内在的金属状态超导体
Extrinsic and Intrinsic Anomalous Metallic States in Transition Metal Dichalcogenide Ising Superconductors
论文作者
论文摘要
二维（2D）超导体中的金属基态吸引了很多关注，但仍受到严格的审查。特别是，由于对外部扰动的敏感性，超高温区域的测量对于2D超导体而言是具有挑战性的。在这项工作中，在二维过渡金属二甲基化金（TMD）超导体4HA-Tase2纳米电视中观察到由外部噪声引起的抗性饱和度，称为“外部异常金属状态”。但是，随着温度进一步降低，可以通过充分滤波外部辐射来获得内在异常金属状态的可靠证据。我们的工作表明，在超高温度下，可以在2D晶体TMD超导体中的量子基态进行实验揭示的异常金属状态。此外，超高面内临界场（BC2 //）揭示了超过Pauli pramagnetic限制（BP）的超导性超导性，从一个单位单元设备到散装状况，在4hA-Tase2中检测到了较弱的偶数。
The metallic ground state in two-dimensional (2D) superconductors has attracted much attention but is still under intense scrutiny. Especially, the measurements in ultralow temperature region are challenging for 2D superconductors due to the sensitivity to external perturbations. In this work, the resistance saturation induced by external noise, named as "extrinsic anomalous metallic state", is observed in 2D transition metal dichalcogenide (TMD) superconductor 4Ha-TaSe2 nanodevices. However, with further decreasing temperature, credible evidence of intrinsic anomalous metallic state is obtained by adequately filtering external radiation. Our work indicates that at ultralow temperatures the anomalous metallic state can be experimentally revealed as the quantum ground state in 2D crystalline TMD superconductors. Besides, Ising superconductivity revealed by ultrahigh in-plane critical field (Bc2//) going beyond the Pauli paramagnetic limit (Bp) is detected in 4Ha-TaSe2, from one-unit-cell device to bulk situation, which might be due to the weak coupling between the TaSe2 sub-monolayers.
