论文标题
轨道效应，保利限制和Fulde-ferrell-larkin-ovchinnikov在2D过渡金属二甲基元素超导体中的竞争
Competition between orbital effects, Pauli limiting, and Fulde-Ferrell-Larkin-Ovchinnikov states in 2D transition metal dichalcogenide superconductors
论文作者
论文摘要
We compare the upper critical field of bulk single-crystalline samples of the two intrinsic transition metal dichalcogenide (TMD) superconductors, 2H-NbSe2 and 2H-NbS2, in high magnetic fields where their layer structure is aligned strictly parallel and perpendicular to the field, using magnetic torque experiments and a high-precision piezo-rotary positioner.尽管两个超导体都表明，当层结构平行地对齐时，轨道效应仍会产生重大影响，但NBS2的上部关键领域上升到Pauli Limiting领域以上并形成Fulde-Ferrell-Larkin-Ovchinnikov（FFLO）州，而Orbital效应抑制了NBSE2下方Pairi limapripandivation pairi limapli lim lim lim limaplipy。从平面外各向异性中，NBSE2中垂直于31Å层的相干长度远大于层间距离，与更多的2d nbs2相反，导致在达到Pauli限制之前的显着轨道效应抑制了Pauli极限之前的超导性。
We compare the upper critical field of bulk single-crystalline samples of the two intrinsic transition metal dichalcogenide (TMD) superconductors, 2H-NbSe2 and 2H-NbS2, in high magnetic fields where their layer structure is aligned strictly parallel and perpendicular to the field, using magnetic torque experiments and a high-precision piezo-rotary positioner. While both superconductors show that orbital effects still have a significant impact when the layer structure is aligned parallel to the field, the upper critical field of NbS2 rises above the Pauli limiting field and forms a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, while orbital effects suppress superconductivity in NbSe2 just below the Pauli limit. From the out-of-plane anisotropies, the coherence length perpendicular to the layers of 31 Å in NbSe2 is much larger than the interlayer distance, leading to a significant orbital effect suppressing superconductivity before the Pauli limit is reached, in contrast to the more 2D NbS2.
