ngµç×ÓÓÎÏ·ÐÂÎÅÍøÑ¶£¨Í¨Ñ¶Ô±ËïÓ£©ÍØÆË¾øÔµÌåÒòÆäÌØÊâµÄÄÜ´ø½á¹¹ºÍÍØÆË±£»¤µÄÍâòµç×Ó̬£¬£¬³ÉΪÐÂÓ±Á¿×ÓÌØÕ÷»ù´¡Ñо¿ÓëÆ÷¼þ¹¹½¨µÄÖ÷Ҫƽ̨¡£¡£ÆäÖУ¬£¬îé»ù¶þÔª¼°ºÏ½ðÖÊÁÏ£¨ÈçBi2TexSe3-x£©¾ßÓÐʱ¼ä·´ÑݶԳÆÐÔ±£»¤µÄÍâò̬£¬£¬ÓÉZ2ÍØÆËÎȹÌÁ¿ÐÎò£¬£¬ÊÇÑо¿×îΪÉîÈëµÄÇ¿ÍØÆËϵͳ֮һ¡£¡£È»¶ø£¬£¬¸ÃÀàÖÊÁÏͨ³£ÎªÖÐÐÄ·´ÑݶԳƽṹ£¬£¬×è°ÁËÔÚÍØÆË´ÅµçЧӦ¡¢¡¢¡¢·ÇÏßÐÔ¹âµç×Ó¶¯Á¦Ñ§ÁìÓòµÄDZÔÚÓ¦Óᣡ£¿ËÈÕ£¬£¬ÖÊÁÏ¿ÆÑ§Ó빤³ÌѧԺÍõ³ÉнÌÊÚ¡¢¡¢¡¢ËïÓ¸±½ÌÊÚÍŶÓͨ¹ýÆøÏà·¶µÂ»ªÍâÑÓÔÚÔÆÄ¸³Äµ×ÉÏÀֳɺϳɶþάJanus Bi2TeSe2ÄÉÃׯ¬£¬£¬Í¨¹ý½á¹¹Éè¼ÆÊµÏÖ¶Ô³ÆÐÔÆÆÈ±¿É¼¯³É¶þ´Îг²¨(SHG)¡¢¡¢¡¢ÌúµçÐÔºÍÌå¹â·üЧӦµÈÖ÷ÒªÐÔ×Ó£¬£¬½øÒ»²½ÍØÕ¹¸ÃÀàÖÊÁϵĹ¦Ð§Î¬¶È£¬£¬´øÀ´ÐÂÆ÷¼þÊÂÇ鷶ʽ£¬£¬ÓÐÍûʵÏֶ๦Ч·ÇÏßÐԴŵçÆ÷¼þÒÔ¼°ÐÂÒ»´ú×ÔÐýµç×ÓÆ÷¼þ¡£¡£

ͼ1. Janus Bi2TeSe2ÄÉÃׯ¬µÄ±íÕ÷ÒÔ¼°SHG²âÊÔ¡£¡£(a) ÏÔ΢ͼÏñ£»(b) HAADF-STEMͼÏñ£»£¨c£©Ô×Ó¼¶EDS mapping; (d) SHGÔÀíͼ£»(e) SHG mapping; (f) ¼«»¯Ïà¹ØSHG.
ÀíÂÛÉÏ£¬£¬Bi2TeSe2±£´æÖÐÐÄ·´ÑݶԳƼ°·Ç¶Ô³ÆÁ½Öֵ䷶¾§Ìå½á¹¹£¬£¬Ä¿½ñѧ½ç¶ÔBi2TeSe2µÄʵÑéÑо¿ËäÓÐÏ£Íû£¬£¬µ«¶àΪÖÐÐĶԳƽṹµÄºÏ³ÉÓë±íÕ÷£¬£¬·ÇÖÐÐĶԳÆÏàµÄµ¥¾§½á¹¹ÉÐδÀÖ³ÉÖÆ±¸£¬£¬ÎïÐÔÑо¿Ø½´ýÍÆ½ø£¬£¬³ÉΪÏÞÖÆ¸ÃÖÊÁÏϵͳ¿ªÕ¹µÄÆ¿¾±Ö®Ò»¡£¡£¸Ã¶þάJanus Bi2TeSe2ÄÉÃׯ¬Óë¹Å°åµÄÖÐÐĶԳÆÖÊÁϲî±ð£¬£¬¸Ã½á¹¹ÖеÄTeÔ×Ӳ㲢·ÇλÓÚµ¥²ãµÄÖÐÐÄλÖ㬣¬¶øÊÇ̻¶ÔÚµ¥²ãÍâ²à£¬£¬ÐγÉÁËSe-Bi-Se-Bi-TeÎå²ãJanus½á¹¹£¨Í¼1a-c£©¡£¡£ÓÉÓÚÖÐÐÄ·´ÑݶԳÆÐÔÆÆÈ±£¬£¬ÀÖ³ÉÔÚ¸ÃÖÊÁÏÖÐÊӲ쵽¼«»¯Ïà¹ØµÄ¶þ´Îг²¨ÌìÉú£¨Í¼1d-f£©¡£¡£±ðµÄ£¬£¬ÊäÔËÕÉÁ¿ÏÔʾ³öÈõ·´¾ÖÓò»¯Ð§Ó¦£¨WAL£©£¬£¬Ö¤ÊµÎúÖÊÁϵÄÇ¿¹ìµÀ×ÔÐýñîºÏÒÔ¼°ÍØÆËÍâò̬¡£¡£½Ç¶ÈÒÀÀµ´Å×èÇúÏßÅú×¢ÄÉÃׯ¬ÖжþÎ¬ÍØÆËÍâòÖ÷µ¼µÄÊäÔËÌØÕ÷£¨Í¼2£©¡£¡£

ͼ2. Janus Bi2TeSe2ÄÉÃׯ¬µÄÊäÔ˲âÊÔ¡£¡£(a) Hall barÆ÷¼þ£»(b) ÏßÐÔ±äεç×裻£¨c£©±äδÅ×èÇúÏߣ» (d)WALЧӦ£»(e, f) ´Å×èµÄ½Ç¶ÈÒÀÀµÐÔ.
ÓëÆäËüÕ½ÂÔʵÏÖ¶Ô³ÆÐÔÆÆÈ´²î±ð£¨ÈçÉÙ²ã½á¹¹¡¢¡¢¡¢ÍâòЧӦ¡¢¡¢¡¢Ó¦±ä¹¤³ÌµÈ£©£¬£¬·ÇÖÐÐĶԳƾ§Ìå½á¹¹µÄʵÏÖ´øÀ´µÄÏà¹ØÐÔ×ÓΪÖÊÁϵı¾Õ÷ÌØÕ÷£¬£¬Îª¿ªÕ¹ÉîÈë»ù´¡Ñо¿ÌṩÁËÎȹ̵ÄÖÊÁÏÆ½Ì¨¡£¡£Ïà¹ØÐ§¹ûÒÔ¡°Unusual Janus Bi2TeSe2 Topological Insulators Displaying Second-Harmonic Generation, Linear-in-Temperature Resistivity and Weak Antilocalization¡±ÎªÌâ½ÒÏþÓÚACSÆì½¢¿¯ÎïJournal of the American Chemical Society£¨https://doi.org/10.1021/jacs.4c03176£©¡£¡£ÖÊÁÏ¿ÆÑ§Ó빤³ÌѧԺ2020¼¶Ö±²©Éú×ÞÏþ±òΪ¸ÃÂÛÎĵÚÒ»×÷Õߣ¬£¬ËïÓ¸±½ÌÊÚºÍÍõ³ÉнÌÊÚΪÅäºÏͨѶ×÷Õߣ¬£¬Ñ§Ôº2023¼¶²©Ê¿ÉúÔ·ÐùºÀºÍÀîÑÒ¸±½ÌÊÚÔÚÀíÂÛÅÌËã·½Ãæ¸øÓèÁËÖ÷ÒªÖ§³Ö¡£¡£¸ÃÑо¿ÊÂÇéÊܵ½¹ú¼Ò×ÔÈ»¿ÆÑ§»ù½ð¡¢¡¢¡¢¹ã¶«Ê¡×ÔÈ»¿ÆÑ§»ù½ðµÄ´óÁ¦Ö§³Ö¡£¡£
ÂÛÎÄÁ´½Ó£ºhttps://doi.org/10.1021/jacs.4c03176