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作者丁颖,赵林,闫宏涛,高强,刘静,胡成,黄建伟,李聪,徐煜,蔡永青,戎洪涛,吴定松,宋春尧,周花雪,董晓莉,刘国东,王庆艳,张申金,王志敏,张丰丰,杨峰,彭钦军,许祖彦,陈创天,周兴江（2019）在《Disappearance of Superconductivity and a Concomitant Lifshitz Transition in Heavily Overdoped Bi2Sr2CuO6 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy》一文中研究指出：By partially doping Pb to effectively suppress the superstructure in single-layered cuprate Bi2Sr2CuO6+δ（Pb-Bi2201） and annealing them in vacuum or in high pressure oxygen atmosphere, a series of high quality Pb-Bi2201 single crystals are obtained with Tc covering from 17 K to non-superconducting in the overdoped region. High resolution angle resolved photoemission spectroscopy measurements are carried out on these samples to investigate the evolution of the Fermi surface topology with doping in the normal state. Clear and complete Fermi surfaces are observed and quantitatively analyzed in all of these overdoped Pb-Bi2201 samples. A Lifshitz transition from holelike Fermi surface to electron-like Fermi surface with increasing doping is observed at a doping level of 0.35. This transition coincides with the change that the sample undergoes superconducting-to-non-superconducting states.Our results reveal the emergence of an electron-like Fermi surface and the existence of a Lifshitz transition in heavily overdoped Bi2201 samples. This provides important information in understanding the connection between the disappearance of superconductivity and the Lifshitz transition in the overdoped region.
Abstract
By partially doping Pb to effectively suppress the superstructure in single-layered cuprate Bi2Sr2CuO6+δ（Pb-Bi2201） and annealing them in vacuum or in high pressure oxygen atmosphere, a series of high quality Pb-Bi2201 single crystals are obtained with Tc covering from 17 K to non-superconducting in the overdoped region. High resolution angle resolved photoemission spectroscopy measurements are carried out on these samples to investigate the evolution of the Fermi surface topology with doping in the normal state. Clear and complete Fermi surfaces are observed and quantitatively analyzed in all of these overdoped Pb-Bi2201 samples. A Lifshitz transition from holelike Fermi surface to electron-like Fermi surface with increasing doping is observed at a doping level of 0.35. This transition coincides with the change that the sample undergoes superconducting-to-non-superconducting states.Our results reveal the emergence of an electron-like Fermi surface and the existence of a Lifshitz transition in heavily overdoped Bi2201 samples. This provides important information in understanding the connection between the disappearance of superconductivity and the Lifshitz transition in the overdoped region.
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论文作者分别是来自Chinese Physics Letters的丁颖,赵林,闫宏涛,高强,刘静,胡成,黄建伟,李聪,徐煜,蔡永青,戎洪涛,吴定松,宋春尧,周花雪,董晓莉,刘国东,王庆艳,张申金,王志敏,张丰丰,杨峰,彭钦军,许祖彦,陈创天,周兴江，发表于刊物Chinese Physics Letters2019年01期论文，是一篇关于,Chinese Physics Letters2019年01期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自Chinese Physics Letters2019年01期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。