论文标题
在钼中的弗里德尔振荡和氦气气泡排序
Friedel oscillations and helium bubble ordering in molybdenum
论文作者
论文摘要
植入金属中的氦离子可以演变成宿主晶格的有序气泡同构。通常认为远程弹性相互作用可以驱动气泡超级晶格的形成，但在最初的阶段对热力学知识知之甚少。我们的第一原理计算表明，在钼中，单个氦气诱导的弗里德尔振荡同时产生潜在的屏障和井，以便在短时间内进行氦气聚类。高浓度下的这种排斥和吸引力提供了热力学潜水力，以帮助将他的原子随机排成一个有序的气泡。弗里德尔振荡可能会对合金中的溶质 - 糖相互作用产生一般影响。
Helium ions implanted into metals can evolve into ordered bubbles isomorphic to the host lattice. Long-range elastic interaction is generally believed to drive the formation of bubble superlattice, but little is known about the thermodynamics at the very initial stage. Our first-principles calculations demonstrate that in molybdenum, Friedel oscillations induced by individual helium generate both potential barriers and wells for helium clustering at short He-He distances. Such repulsion and attraction at high concentration provide a thermodynamic diving force to assist lining up randomly distributed He atoms into ordered bubbles. Friedel oscillations might have general impact on solute-solute interactions in alloys.
