论文标题
单壁iSing纳米管具有相反的相互作用，使用Wang-landau算法
Single-walled Ising nanotube with opposite sign of interactions using Wang-Landau algorithm
论文作者
论文摘要
使用Wang-Landau算法研究了单壁伊斯丁纳米管中相互作用的相反符号的效果。热力学可观察物是根据有或不存在外部磁场的状态密度（DOS）计算的。不论应用磁场如何，相互作用的相反迹象都可以观察到DOS的对称趋势，这与相同相互作用迹象的不对称趋势相反。此外，观察到两种类型的抗铁磁（AFM）订购，即A型和C型抗铁磁序，以相互作用的相反迹象。这些AFM旋转方向通过增加施加的磁场（$ b $）而切换到铁磁（FM）相。但是，旋转顺序从有序的AFM/FM相变为通过增加温度来变为无序的顺磁性相。相图显示，这三个阶段在$ b = 2.0 $左右共存。这项研究表明，通过正确调整磁性，单壁纳米管可用于制造新型的磁性储存纳米材料。
The effect of opposite sign of interactions in a single-walled Ising nanotube is investigated using the Wang-Landau algorithm. The thermodynamic observables are calculated from the estimated density of states (DOS) with and without the presence of an external magnetic field. Irrespective of the applied magnetic field, a symmetric trend of DOS is observed for opposite sign of interactions which is in contrast to the asymmetric trend for same sign of interactions. Further, two types of anti-ferromagnetic (AFM) orderings, namely A-type and C-type anti-ferromagnetic order, are observed for opposite sign of interactions. These AFM spin orientations are switched to ferromagnetic (FM) phase by increasing the applied magnetic field ($B$). However, the spin ordering changes from the ordered AFM/FM phase to a disordered paramagnetic phase by increasing the temperature. Phase diagram shows that these three phases coexist around $B=2.0$. This study indicates that, by properly tuning the magnetic properties, the single-walled nanotube can be used for fabrication of new types of magnetic storage nano materials.
