Layered transition metal dichalcogenides(TMDCs)gained widespread attention because of their electron-correlationrelated physics,such as charge density wave(CDW),superconductivity,etc.In this paper,we report the high-r...Layered transition metal dichalcogenides(TMDCs)gained widespread attention because of their electron-correlationrelated physics,such as charge density wave(CDW),superconductivity,etc.In this paper,we report the high-resolution angle-resolved photoemission spectroscopy(ARPES)studies on the electronic structure of Ti-doped 1T-Ti_(x)Ta_(1-x)S_(2) with different doping levels.We observe a flat band that originates from the formation of the star of David super-cell at the x=5%sample at the low temperature.With the increasing Ti doping levels,the flat band vanishes in the x=8%sample due to the extra hole carrier.We also find the band shift and variation of the CDW gap caused by the Ti-doping.Meanwhile,the band folding positions and the CDW vector g_(CDW)intact.Our ARPES results suggest that the localized flat band and the correlation effect in the 1T-TMDCs could be tuned by changing the filling factor through the doping electron or hole carriers.The Ti-doped 1T-Ti_(x)Ta_(1-x)S_(2) provides a platform to fine-tune the electronic structure evolution and a new insight into the strongly correlated physics in the TMDC materials.展开更多
O 前言 油脂加工过程中前部除尘是不可缺少的一环。除尘的效果如何,直接影响空间环境。我厂是油脂加工老厂,但是多年来除尘问题一直没有得到很好解决,排放空气浓度始终超标。今年我厂采用了JFC机械回转反吹扁袋除尘器效果非常理想,一次...O 前言 油脂加工过程中前部除尘是不可缺少的一环。除尘的效果如何,直接影响空间环境。我厂是油脂加工老厂,但是多年来除尘问题一直没有得到很好解决,排放空气浓度始终超标。今年我厂采用了JFC机械回转反吹扁袋除尘器效果非常理想,一次试车成功,清理车间室内粉尘浓度与室外排放浓度均达到了国家标准。展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.12274455,11774421,21622304,61674045,11604063,and 12074116)the National Key R&D Program of China(Grant Nos.2016YFA0200700 and 2022YFA1403800)+1 种基金the Strategic Priority Research Program(Chinese Academy of Sciences,CAS)(Grant No.XDB30000000)supported by the Fundamental Research Funds for the Central Universities and the Research Funds of Renmin University of China(Grant No.21XNLG27)。
文摘Layered transition metal dichalcogenides(TMDCs)gained widespread attention because of their electron-correlationrelated physics,such as charge density wave(CDW),superconductivity,etc.In this paper,we report the high-resolution angle-resolved photoemission spectroscopy(ARPES)studies on the electronic structure of Ti-doped 1T-Ti_(x)Ta_(1-x)S_(2) with different doping levels.We observe a flat band that originates from the formation of the star of David super-cell at the x=5%sample at the low temperature.With the increasing Ti doping levels,the flat band vanishes in the x=8%sample due to the extra hole carrier.We also find the band shift and variation of the CDW gap caused by the Ti-doping.Meanwhile,the band folding positions and the CDW vector g_(CDW)intact.Our ARPES results suggest that the localized flat band and the correlation effect in the 1T-TMDCs could be tuned by changing the filling factor through the doping electron or hole carriers.The Ti-doped 1T-Ti_(x)Ta_(1-x)S_(2) provides a platform to fine-tune the electronic structure evolution and a new insight into the strongly correlated physics in the TMDC materials.
