量子科技研究院Seminar第18讲/物理学科Seminar第679讲 IV族二维材料纳米尺寸效应的第一性原理研究

创建时间:  2024/08/29  龚惠英   浏览次数:   返回

报告题目 (Title):First-Principles Study of Nanometer Size Effect on Group-IV 2-D Materials(IV族二维材料纳米尺寸效应的第一性原理研究)

报告人 (Speaker):赵建华(济宁学院)

报告时间 (Time):2024年8月30日(周五) 10:30-12:30

报告地点 (Place):校本部 E106

邀请人 (Inviter):任伟 教授

主办部门:金沙威尼斯欢乐娱人城物理系

摘要 (Abstract):

With continued shrinkage of device size in microchips, lateral in-plane coupling (LIPC) between neighboring materials or devices becomes increasingly important. Properties brought about by lateral in-plane coupling between graphene nanoribbons (GNRs) are investigated using the first-principle calculations. It is found that, when two GNRs approach each other, the lateral coupling between the two brings about edge state splitting. Between zigzag-edged graphene nanoribbons (ZGNRs), the coupling mainly results from Coulomb and spin-spin interaction, while for armchair-edged graphene nanoribbons (AGNRs), it is from Coulomb interaction only. It is further found that the maximum inter-ribbon distance for effective coupling depends on the type of ribbons, which is ~10 Å for ZGNRs, but ~6 Å for AGNRs. In addition, properties brought about by LIPC between two-dimensional zigzag-edged silicon (silicene), germanium (germanene), tin (stannene), and lead (plumbene) nanoribbons (ZXNRs; X=Si, Ge, Sn, and Pb) are also respectively investigated using the similar method. It is further found that the maximum inter-ribbon distance for effective coupling is ~ 12 Å, which is not dependent on the element, for zigzag group-IV graphene-like nanoribbons. The results may be important for the microminiaturization of future nanoelectronic and spintronic devices based on group-IV graphene-like materials.

上一条:数学学科Seminar第2694讲 Levy噪声驱动的McKean-Vlasov型Langevin动力学在Lyapunov条件下的指数收缩性和时间一致的混沌传播

下一条:物理学科Seminar第678讲 两组份能隙孤子的拓扑输运和囚禁


量子科技研究院Seminar第18讲/物理学科Seminar第679讲 IV族二维材料纳米尺寸效应的第一性原理研究

创建时间:  2024/08/29  龚惠英   浏览次数:   返回

报告题目 (Title):First-Principles Study of Nanometer Size Effect on Group-IV 2-D Materials(IV族二维材料纳米尺寸效应的第一性原理研究)

报告人 (Speaker):赵建华(济宁学院)

报告时间 (Time):2024年8月30日(周五) 10:30-12:30

报告地点 (Place):校本部 E106

邀请人 (Inviter):任伟 教授

主办部门:金沙威尼斯欢乐娱人城物理系

摘要 (Abstract):

With continued shrinkage of device size in microchips, lateral in-plane coupling (LIPC) between neighboring materials or devices becomes increasingly important. Properties brought about by lateral in-plane coupling between graphene nanoribbons (GNRs) are investigated using the first-principle calculations. It is found that, when two GNRs approach each other, the lateral coupling between the two brings about edge state splitting. Between zigzag-edged graphene nanoribbons (ZGNRs), the coupling mainly results from Coulomb and spin-spin interaction, while for armchair-edged graphene nanoribbons (AGNRs), it is from Coulomb interaction only. It is further found that the maximum inter-ribbon distance for effective coupling depends on the type of ribbons, which is ~10 Å for ZGNRs, but ~6 Å for AGNRs. In addition, properties brought about by LIPC between two-dimensional zigzag-edged silicon (silicene), germanium (germanene), tin (stannene), and lead (plumbene) nanoribbons (ZXNRs; X=Si, Ge, Sn, and Pb) are also respectively investigated using the similar method. It is further found that the maximum inter-ribbon distance for effective coupling is ~ 12 Å, which is not dependent on the element, for zigzag group-IV graphene-like nanoribbons. The results may be important for the microminiaturization of future nanoelectronic and spintronic devices based on group-IV graphene-like materials.

上一条:数学学科Seminar第2694讲 Levy噪声驱动的McKean-Vlasov型Langevin动力学在Lyapunov条件下的指数收缩性和时间一致的混沌传播

下一条:物理学科Seminar第678讲 两组份能隙孤子的拓扑输运和囚禁