论文标题
1T-TAS2的电荷密度波转变中的结构磁滞
A structural hysteresis in the charge density wave transition of 1T-TaS2
论文作者
论文摘要
在准二维1T-TAS2中，电荷密度波（CDW）原型，该过渡分为两个步骤，从不一致（ICDW）和几乎相应（NCCDW）（NCDW）以及从NCDW到Commensementrate（CCDW），锁定在电阻率上。在NCDW到CCDW转变的电阻率中观察到的磁滞具有根源到结构磁滞，其中SQRT（13）A X SQRT（13）的局部畸变由中子和X射线衍射揭示了上层结构。结构滞后是由于大卫（SOD）的恒星故障造成的，这是由于远离完美的三角形几何形状以及平面的畸变的位移。此外，上层建筑表现出一个3CO层堆叠顺序，在ICDW状态下会在变暖和完全消失时削弱。
In quasi-two-dimensional 1T-TaS2, a charge density wave (CDW) prototype, the transition occurs in two steps, from incommensurate (ICDW) and nearly commensurate (NCCDW) and from NCDW to commensurate (CCDW), locked in the resistivity step-wise behavior. The hysteresis observed in the resistivity across the NCDW-to-CCDW transition has roots to a structural hysteresis, where local distortions of the sqrt(13)a x sqrt(13)a superstructure are revealed by neutron and X-ray diffraction. The structural hysteresis is due to faulty stars of David (SODs) because of Ta displacements away from the perfect trigonal geometry as well as out of plane S distortions. Furthermore, the superstructure exhibits a 3co layer stacking order that weakens on warming and fully disappears in the ICDW state.
