睿涉者 · 前沿科学论坛是由蔻享学术平台和Quantum Design中国联合发起的公益性前沿学术论坛,内容涉及超导、量子光学、纳米材料、低温及磁学、化学等相关领域。睿涉者,谐音Researcher,中文寓意为在科学探索路上跋涉的睿者。睿涉者 · 前沿科学论坛旨在凝聚集体智慧,在新的形势下提升我国科学知识传播,为前沿科学创新和服务国家重大需求贡献力量。我们将秉承“源于科学,致力科学”的理念,致力于服务科学、传播科学、共享科学的宗旨,为国内外广大科研工作者提供高品质、以前沿科学技术为核心的系列直播课程及学术报告和交流平台。同时,本论坛也特别成立了专家委员会,由国内顶尖的科研院所专家组成,每一期将由委员会组织邀请领域内专家讲解前沿实验技术、研究成果,与广大研究人员共同探索前沿科学。
2021年睿涉者.前沿科学论坛成功举办后在学术界反响强烈,备受好评,2022年蔻享学术平台与Quantum Design中国升级合作,携手共同举办“睿涉者.前沿科学论坛-大师讲”,邀请国内外专家分享前沿的科研创新进展、研究成果等,增进海内外学者之间的学术交流,拓宽学术视野,为广大科研工作者带来一场高水平的学术盛宴。
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Majorana zero-modes (MZMs) are spatially-localized zero-energy fractional quasiparticles with non-Abelian braiding statistics. They are believed to hold great promise for topological quantum computing. By using low-temperature and strong-magnetic-field scanning tunneling microscopy/spectroscopy, a breakthrough of Majorana zero mode has been achieved in a single material platform of high-Tc iron-based superconductor, FeTe0.55Se0.45,. This material combines the advantages of a simple material, high-Tc, and large ratio of Δ/EF. The mechanism of two distinct classes of vortices presented in this system was revealed, which directly tied with the presence or absence of zero-bias peak. We further found the Majorana conductance plateau in vortices on the iron-based superconductor FeTe0.55Se0.45. Both the extrinsic instrumental convoluted broadening and the intrinsic quasiparticle poisoning can reduce the conductance plateau value, and when extrinsic instrumental broadening is removed by deconvolution, the plateau is found to nearly reach a 2e²/h quantized value. Moreover, we confirmed the existence of MZMs in the vortex cores of CaKFe4As4 and LiFeAs, single-material superconductors belonging to the iron pnictide family. Most recently, we have successfully achieved the large-scale, highly-ordered and tunable MZM lattice in strained LiFeAs. These results show the great potential of the single-material platforms for Majorana research and application in the future.
报告人介绍
高鸿钧 院士
中国科学院物理研究所
微信号:QuantumDesign
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