|
|
[ÇóÖú]
Çë½Ì£¬ÈçºÎ×ÜTotal energy mapping£¿
ÈçÌ⣬½ñÌì¿´ÎÄÕÂAb initio calculations of zirconium adsorption and diffusion on graphene£¬¿´µ½ÁËÒ»·ùͼ£¬ÎÄÖÐͼ5£¬¸½¼þÖÐͼ1£¬Õâ·ùͼÊÇZrÔ×ÓÔÚʯīϩÉÏÎü¸½µÄTotal energy mapping£¬ÓÃÓÚ±íÊöÀ©É¢±ÚÀÝ£¨¸öÈËÀí½â£©£¬ÎÄÖÐÌáµ½ÁËÈçºÎ×öÕâ·ùͼ£¬ÃèÊöÈçÏ£º
In these calculations, we fix the coordinates of two C atoms, away from the absorbed Zr atom, in the graphene surface with the previously calculated and relaxed distances. The two fixed atoms neglect the movement of the graphene center-of-mass during relaxations. We relax all the other C atoms. We nullify the forces of the Zr atom in the x and y axes at every step while the z coordinate is relaxed. The total-energy mapping of the Zr atom on a graphene surface is shown in Fig. 5.
Õâ¾ä»°µÄ´ó¸ÅÒâ˼ÊÇ£º¹Ì¶¨×¡²»¿¿×ű»Îü¸½Ô×ÓµÄCÔ×Ó£¬²¢Çҹ̶¨ZrµÄx y×ø±ê£¬Ö»³ÚÔ¥z×ø±ê£¬Í¬Ê±£¬ÆäÓàµÄCÔ×ÓµÄËùÓÐ×ø±ê¶¼³ÚÔ¥£¿
µ«ÊÇÕâ¶Î»°»¹Óв»Ã÷°×µÄµØ·½£¬Çë¸÷λǰ±²Ö¸½Ì£º
1. The two fixed atoms neglect the movement of the graphene center-of-mass during relaxations. Õâ¾ä»°ÊÇʲôÒâ˼£¿Ê²Ã´ÊÇcenter-of-mass£¿£¿£¿
2. ÈçºÎʵÏÖ£º¹Ì¶¨×¡²»¿¿×ű»Îü¸½Ô×ÓµÄCÔ×Ó£¬²¢Çҹ̶¨ZrµÄx y×ø±ê£¬Ö»³ÚÔ¥z×ø±ê£¬Í¬Ê±£¬ÆäÓàµÄCÔ×ÓµÄËùÓÐ×ø±ê¶¼³ÚÔ¥£¿Ê¹ÓÃDynamicÐÎʽµÄPOSCARÂð£¿
ÀàËÆ£º
C 0 0 0 F F T
C 0.3 0.3 0 T T T
¡¡¡¡¡
Zr 0.5 0.5 0.1 F F T
ÕâÑùµÄÒ»Àà¸ñʽÂ𣿣¿£¿
»¹ÊÇʹÓÃʲô±ðµÄ·½Ê½×ö³öÀ´£¿
3. ×îºóÒ»¸öÎÊÌ⣬ËùÓÐÄÜÁ¿µãµÄÊý¾Ý¼ÆËã³öÀ´Ö®ºó£¬ÈçºÎÓÃorigin×÷ͼ£¿£¿£¿ÓÐЩÏë²»³öÀ´¡¡
ÎÊÌâ±È½ÏÄÑ£¬Çë¸÷λǰ±²Ö¸½Ì£¬Ð»Ð» ![Çë½Ì£¬ÈçºÎ×ÜTotal energy mapping£¿]()
Fig. 1.jpg |
» ±¾Ìû¸½¼þ×ÊÔ´Áбí
» ²ÂÄãϲ»¶
» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:
|