ngµç×ÓÓÎÏ·ÐÂÎÅÍøÑ¶£¨Í¨Ñ¶Ô±Í¯Õ꣩³¬µÍµ¼ÈȹÌÌå¾§ÌåÖÊÁ϶ÔÄÜÔ´Ïà¹ØÓ¦ÓþßÓÐÖ÷ÒªÒâÒå¡£¡£¡£ÎªÁË»ñµÃµÍÈȵ¼ÂÊ£¬£¬£¬Ä¿½ñÖ÷ÒªµÄÑо¿Ë¼Ð÷ÊÇͨ¹ýµ÷Àí¹ÌÌå¾§ÌåÖÊÁÏÖеÄÉù×ÓµÄÀàÁ£×ÓÈö²¥ (particle-like propagation)£¬£¬£¬°üÀ¨¾§¸ñ»û±ä¡¢¾§¸ñÇ¿·Ç¼òгÐÔ¡¢È±Ïݹ¤³Ì¡¢ÄÉÃ×¹¤³ÌµÈʵÏÖÉù×ÓǿɢÉä½µµÍÈȵ¼ÂÊ£¬£¬£¬È»¶øºöÂÔÁ˵͵¼ÈȾ§ÌåÖÐÉù×ÓµÄÀನÈö²¥(wave-like propagation)¶ÔÈÈ´«µ¼Ð¢Ë³ÒÔ¼°Ó°Ïì»úÀíµÄÑо¿¡£¡£¡£
2023Äê10ÔÂ13ÈÕ£¬£¬£¬ngµç×ÓÓÎÏ·ÏȽøÄÜԴѧԺͯÕêÖúÀí½ÌÊÚ¿ÎÌâ×éÔÚ¹ú¼ÊÖøÃûѧÊõÆÚ¿¯Nano LettersÉϽÒÏþÁËÌâΪ¡°Glass-like Transport Dominates Ultralow Lattice Thermal Conductivity in Modular Crystalline Bi4O4SeCl2¡±µÄÂÛÎÄ£¬£¬£¬Ì½ÌÖÁËBi4O4SeCl2Öо§¸ñµ¼ÈÈÓëÆäÄ£¿é»¯¾§Ìå½á¹¹µÄ¹ØÏµ£¬£¬£¬Õ¹ÏÖÁ˸þ§Ìå½á¹¹ÖÐÀನ´«ÊäÖ÷µ¼µÄ³¬µÍÈȵ¼ÂÊ»úÀí£¬£¬£¬²¢·¢Ã÷Æä¾§¸ñÈȵ¼ÂÊÊÒÎÂÏÂΪ0.1 W/mK(½öΪ¿ÕÆøµÄ~4±¶)£¬£¬£¬¸ÃÑо¿ÎªÉè¼Æ³¬µÍÈȵ¼Âʾ§ÌåÖÊÁÏÌṩÁËÐÂ˼Ð÷¡£¡£¡£
Ñо¿Í¨¹ýÁ¬ÏµÃܶȷºº¯ÅÌËãºÍWignerÊäÔËÀíÂÛÄ£×Ó£¬£¬£¬ÅÌËãÁ˾§ÌåBi4O4SeCl2¾§¸ñÈȵ¼ÂʦÊLÖÐÀàÁ£×Ó(¦Êp)ºÍÀನÊäÔË(¦Êc)Т˳ÒòËØ(¦ÊL=¦Êp+¦Êc)¡£¡£¡£Ê¹ÓõÚÒ»ÔÀíÅÌËãÈí¼þÒÔ¼°×ÔÖ÷ÍØÕö¿ª·¢µÄ³ÌÐò£¬£¬£¬Õ½Ê¤ÁËÒÔÍùֻ˼Á¿»ù̬(0 K)ϵÄÔ×Ó¼ä×÷ÓÃÁ¦³£ÊýÎó²î£¬£¬£¬±¾Ñо¿ÖÐÑÏ¿áÅÌËãÁËÓÐÏÞζÈϵÄÔ×Ó¼ä×÷ÓÃÁ¦³£Êý£¬£¬£¬´Ó¶ø½«Î¶ÈÒýÆðµÄÉù×ÓÖØÕû»¯ºÍ·Ç¼äЪÐÔÒýÈëÈýÉù×Ó¡¢ËÄÉù×ÓÒÔ¼°È±ÏÝÉ¢Éä¶ÔÈȵ¼ÂÊÓ°ÏìµÄÅÌËã¡£¡£¡£Ñо¿·¢Ã÷ÔÚ¾§ÌåBi4O4SeCl2ÖУº£º(1)ÑØ×Ÿþ§ÌåabÆ½ÃæÄÚ£¬£¬£¬¦ÊLËæÎ¶ȵÄÔöÌí¶øÔöÌí£¬£¬£¬ÔÚijһζÈʱµÖ´ï·åÖµ£¬£¬£¬È»ºóÔÚÉù×Ó-Éù×ÓÉ¢Éä×÷ÓÃÔöÌíµÄÇéÐÎϽµµÍ£¬£¬£¬ÇÒ´ËʱµÄ¦ÊL~T -0.887£¬£¬£¬¿¿½ü±ê×¼~T -1£¬£¬£¬Åú×¢¸ÃÆ«Ïò¦ÊLÖ÷ҪȪԴÓÚÀàÁ£×ÓÈö²¥µÄТ˳£»£»£»(2) ÑØ×űÊÖ±ÓÚabÆ½Ãæ(ÑØc)Æ«Ïò£¬£¬£¬¦ÊLÔÚ 20-300 K µÄ¹æÄ£ÄÚËæÎ¶ȿÝÔïÔöÌí£¬£¬£¬´ËʱµÄ¦ÊL~T -0.071£¬£¬£¬ÏÕЩÓë ζÈÎ޹أ¬£¬£¬ÕâÖַǵ䷶µÄζÈÒÀÀµÐÔÅú×¢¸ÃÆ«Ïò¦ÊL¾ßÓÐÓëÀನÈö²¥ÏàËÆµÄ»úÖÆ(ÓëÀàÁ£×ÓÈö²¥²î±ð£¬£¬£¬ÀನÈö²¥Ã»ÓÐÕñ¶¯Ä£Ê½£¬£¬£¬Ö÷ÒªÊÇͨ¹ýÀàËÆZenerµÄËíµÀЧӦÀ´´«µ¼ÈÈÁ¿)£¬£¬£¬Í¬Ê±ÑØ¸ÃÆ«ÏòµÄ¦ÊL ÊÒÎÂϽöΪ0.17 W/mK £¬£¬£¬ÊÇÏÖÔÚËù±¨µÀµÄ¿é×´ÎÞ»ú¹ÌÌå¾§ÌåÖÊÁÏÖÐ×îµÍµÄÈȵ¼ÂÊ¡£¡£¡£Í¨Ì«¹ýÎö¸Ã¾§ÌåÖеÄÉù×ÓÉ¢ÉäÂÊ¡¢Éù×ÓȺËÙÂÊ¡¢Æ½¾ù×ÔÓɳ̵ÈÌØÕ÷£¬£¬£¬·¢Ã÷µ¼ÖÂÆä³¬µÍÈȵ¼ÂʵĻù´¡ÔÒòÊÇ£º£ºBi4O4SeCl2 ½á¹¹ÑØ×ÅcÆ«ÏòÓÉBiOCl ºÍ Bi2O2Se ²ã¶Ñµþ×é³ÉABACC£¨¼´ Bi2O2-Se-Bi2O2-Cl-Cl£©Ä£¿é¾§Ìå¹¹ÐÍ£¬£¬£¬¼´ÐγÉÁË[Bi2O2]2+ µ¥Î»ÄÚµÄÇ¿¼ü¡¢Bi2O2Se ÄÚ[Se]2- µÄ¾§ÌåÒ×±äÐμüºÍ[Cl]- ÒõÀë×ÓµÄÈõ·¶µÂ»ª¼üµÄÇ¿Èõ¼üñîºÏ£¬£¬£¬Ð§¹ûʹµÃÑØ¸ÃÆ«ÏòµÄÉù×ÓÄÜ´øÎªÆ½´ø£¬£¬£¬´Ó¶øµ¼ÖÂ¸ÃÆ«ÏòµÄÉù×ÓÉ¢Éä·Ç¼òгÐÔÏÔÖøÔöÇ¿ÇÒȺËÙÂʱ»ÑÏÖØÈõ»¯¡£¡£¡£
±ðµÄ£¬£¬£¬¸ÃÑо¿½øÒ»²½½«È±ÏÝÉ¢ÉäÒýÈëÅÌËãÄ£×ÓÖУ¬£¬£¬ÅÌËãÓëʵÑéЧ¹ûÎǺÏÓÅÒì¡£¡£¡£Ñо¿·¢Ã÷¦ÊL²¢Ã»ÓÐËæÎ¶ȿÝÔïÔöÌí£¬£¬£¬µ«½ö˼Á¿ÍâÔÚȱÏÝÉ¢ÉäµÄDebye-CallawayÄ£×ÓÐÎòÁ˦ÊL¶ÔζȵĿÝÔïÒÀÀµÐÔ¡£¡£¡£ÏÔÈ»£¬£¬£¬Debye-Callaway Ä£×Ó½«¦ÊL½ö¹éÒòÓÚµÍȺËÙÂʺÍÍâÔÚȱÏÝÉ¢É䣬£¬£¬´Ó¶øÑÚÊÎÁ˵ÚÒ»ÔÀí¾§¸ñ¶¯Á¦Ñ§ÅÌËãÖÐËùÕ¹ÏÖµÄÄÚÔÚ·Çг²¨É¢ÉäµÄÖ÷Òª×÷Óᣡ£¡£

ͼ1. (a) Bi4O4SeCl2¾§Ìå½á¹¹¡£¡£¡£ (b) ÑØ (100) ºÍ (110) Æ½ÃæµÄµç×Ó¾ÖÓòº¯Êý¡£¡£¡£(c)Æ½ÃæÄÚºÍ(d)±ÊÖ±Æ½ÃæÆ«ÏòµÄ¾§¸ñÈȵ¼ÂÊÓëζȵĹØÏµ¡£¡£¡£(e) ÑØÆ½ÃæÄںͱÊÖ±ÃæÆ«ÏòµÄÉù×ÓȺËÙÂÊ¡£¡£¡£(f) ²î±ðζÈϵÄÉù×Óɫɢ(×ó)ºÍÉù×Ó̬ÃܶÈ(ÓÒ)¡£¡£¡£(c)Æ½ÃæÄÚºÍ(d)±ÊÖ±Æ½ÃæÆ«ÏòµÄ¾§¸ñÈȵ¼ÂÊ(ÒýÈëȱÏÝÉ¢Éä)ÓëζȵĹØÏµ¡£¡£¡£
×ÜÖ®£¬£¬£¬Í¨¹ý¶ÔÄ£¿é»¯Bi4O4SeCl2¾§¸ñÖеÄÀàÁ£×ÓºÍÀನÊäÔËÈÈ´«µ¼µÄÑо¿£¬£¬£¬Õ¹ÏÖÁ˸þ§Ìå½á¹¹ÖÐÀನ´«ÊäÖ÷µ¼µÄ³¬µÍÈȵ¼ÂÊ»úÀí£¬£¬£¬ÆÊÎöÁËÆä¾§¸ñµ¼ÈÈÓëÆäÄ£¿é»¯¾§Ìå½á¹¹µÄ¹ØÏµ£¬£¬£¬·¢Ã÷½öÐèͨ¹ýµ÷¿Ø¾§Ìå½á¹¹×Ô¼ºµÄ¹ÌÓÐÌØÕ÷¶øÎÞÐè¸üÎªÖØ´óµÄȱÏÝ¡¢ÄÉÃ×¹¤³Ì£¬£¬£¬¾ÍÄÜʵÏÖ¹ÌÌå¾§ÌåÖÊÁϵij¬µÍ¦ÊLˮƽ£¬£¬£¬´Ó¶øÎªÊµÑé·¢Ã÷ºÍºÏ³É³¬µÍÈȵ¼ÂÊÐÂÄÜÔ´ÖÊÁÏÌṩÁËÓÐÁ¦µÄÀíÂÛÖ¸µ¼ºÍÊý¾ÝÖ§³Ö¡£¡£¡£
ÃÀ¹úÃ÷ÄáËÕ´ï´óѧTraian Dumitric?½ÌÊÚ¡¢µÂ¹ú²»À´Ã·´óѧThomas Frauenheim½ÌÊÚΪ¸ÃÂÛÎĵÄÅäºÏͨѶ×÷Õß¡£¡£¡£ngµç×ÓÓÎÏ·ÏȽøÄÜԴѧԺͯÕêÖúÀí½ÌÊÚΪ¸ÃÂÛÎĵĵÚÒ»¼æµÚÒ»ÅäºÏͨѶ×÷Õߣ¬£¬£¬ngµç×ÓÓÎϷΪ¸ÃÊÂÇéµÄµÚÒ»Íê³Éµ¥Î»¡£¡£¡£
ÂÛÎÄÁ´½Ó£º£ºhttps://doi.org/10.1021/acs.nanolett.3c02957