鎴戦櫌鍏堣繘鍚堥噾鏉愭枡绉戠爺鍥㈤槦闄堟椽绁ュ壇鏁欐巿锛屼笌涓浗绉戝闄㈢墿鐞嗙爺绌舵墍銆佷笂娴蜂氦閫氬ぇ瀛︾墿鐞嗕笌澶╂枃瀛﹂櫌銆佺編鍥芥鏍戝箔鍥藉瀹為獙瀹ゃ€佷腑鍥戒汉姘戝ぇ瀛︺€佸崡鏂圭鎶€澶у澶氬鍗曚綅鍚堜綔锛屼綔涓虹涓€浣滆€咃紝浠ョ寤哄伐绋嬪闄负绗笁鍗曚綅鍦ㄥ浗闄呰憲鍚嶆潗鏂欑被椤剁骇鏈熷垔銆�Advanced Materials銆�涓婂彂琛ㄨ鏂囷紝棰樹负鈥�Topological crystalline insulator candidate ErAsS with hourglass fermion and magnetic-tuned topological phase transition鈥濓紝瀹炵幇浜嗘垜闄㈡暀甯堝湪璇ユ湡鍒婄殑绐佺牬銆�

鏂板瀷鎷撴墤鏉愭枡鍜屾嫇鎵戠浉鍙樼殑鍙戠幇瀵逛簬鎺ㄥ姩鍑濊仛鎬佺墿鐞嗗拰鏉愭枡鐗╃悊鐨勫彂灞曞叿鏈夐噸瑕佹剰涔夈€傚叿鏈夐潪骞冲焊鑳藉甫浜ゅ弶鐨勬矙婕忓瀷琛ㄩ潰鎬佹槸涓€绉嶇嫭鐗圭殑鎷撴墤鐗╃浉锛屽叾浣嶄簬娌欐紡鐘惰壊鏁ｉ閮ㄧ殑椤剁偣锛屽叿鏈夊娌欐紡鍨嬪灏旂偣銆佽妭鐐归摼鍙婅妭鐐圭綉缁滅瓑鐗圭偣銆傝縿浠婁负姝紝鐞嗚棰勬祴鐨勫叿鏈夋矙婕忓瀷琛ㄩ潰鎬佺殑鍊欓€夋潗鏂欑敱浜庣┖姘旀晱鎰熴€佹潅甯﹁壊鏁ｅ拰瑙ｇ悊鍥伴毦绛夐棶棰橈紝灏氭湭寰楀埌瀹為獙楠岃瘉銆�

璇ュ伐浣滄墍鎶ラ亾鐨�ErAsS鍖栧悎鐗╁彲瑙嗕负鍦ㄤ簩缁�As灞傞棿鎻掑叆ErS灞傦紝鍒╃敤X灏勭嚎鍗曟櫠琛嶅皠鍜岄珮鍒嗚鲸鐞冨樊鐢甸暅锛岃瘉瀹�ErAsS鐨勭┖闂寸兢涓�Pnma (No. 62)锛屼簩缁�As闄㈠瓙灞傚唴瀛樺湪鏅舵牸鐣稿彉銆傚埄鐢ㄤ腑瀛愯灏勭粨鍚堢鎬ф祴閲忕‘瀹氫簡ErAsS鐨勭缁撴瀯杞彉锛氬湪楂樻俯涓洪『纾佺浉锛涘湪3.27 K浠ヤ笅涓哄叿鏈夌娉㈢煝(0.5, 0, 0.5)鐨勫叡绾垮弽閾佺鐩革紝纾佺┖闂寸兢涓�Pa2₁/m锛岀鑳炴部鐫€a杞村拰c杞存柟鍚戝垎鍒墿澶т袱鍊嶏紝鏄撶鍖栬酱鏄�b杞达紱鍦�鍙嶉搧纾佸拰椤虹鐩镐箣闂村瓨鍦ㄦ寮︽尝璋冨埗鐨勯潪鍏害纾佺粨鏋勩€�

鐞嗚璁＄畻琛ㄦ槑ErAsS鍦ㄨ垂绫抽潰闄勮繎鍏锋湁澶ц兘閲忓昂搴︾殑绾挎€ц壊鏁ｅ拰鑳藉甫浜ゅ弶锛屽苟鍦ㄨ嚜鏃嬭建閬撹€﹀悎鐨勪綔鐢ㄤ笅鎵撳紑甯﹂殭锛堢害100 meV锛夛紝骞跺彂鐜板叾鍦ㄩ『纾佹€佷笅鍏锋湁婊戠Щ闈繚鎶ょ殑娌欐紡鍨嬭〃闈㈡€佸拰铻烘棆杞翠繚鎶ょ殑楂橀樁妫辨€侊紝灞炰簬鎷撴墤涓嶅彉閲�Z₄ = 2鐨勬嫇鎵戞櫠浣撶粷缂樹綋銆�ARPES瀹為獙瑙傛祴鍒扮殑鑳藉甫缁撴瀯涓庣悊璁洪娴嬬粨鏋滅浉涓€鑷淬€傜浉姣斾簬鍏跺畠鍙兘鍏锋湁娌欐紡鍨嬭〃闈㈡€佺殑鍊欓€夋潗鏂欙紝ErAsS鍏锋湁绋冲畾銆佹棤鏉傚甫鑹叉暎鍙婃槗瑙ｇ绛変紭鍔匡紝鏈夋湜鎴愪负瀹為獙鐮旂┒娌欐紡鍨嬭〃闈㈡€佸強鍏惰緭杩愮壒鎬х殑鐞嗘兂鏉愭枡骞冲彴銆傝€冭檻鍒板瓨鍦ㄧ缁撴瀯杞彉鍜岀娑ㄨ惤鐗规€э紝鍩轰簬鐣稿彉鍥涙柟浜岀淮As灞傜粨鏋勫熀鍏冪殑鏉愭枡鏋佹湁鍙兘鎴愪负瀹炵幇闄堢粷缂樹綋鎴栭噺瀛愬弽甯搁湇灏旂粷缂樹綋鐨勫€欓€変綋绯汇€�