High-temperature Superconductivity: Rare or Ubiquitous?
National University of Singapore
报告摘要：
The 1987 Nobel Prize in Physics celebrated the discovery of superconducting copper oxides (ceramics) with a transition temperature above the 30 Kelvin range. The year 1987 marked the beginning of “high-Tc” superconductivity which a diverse family of copper oxides discovered with “intrinsically” high-Tc superconductivity without the need for pressure, strain, or field modulation. In the following few decades, a broad class of oxide-based layered superconductors are investigated, including but not limited to the Ti-, Bi-, Ru-, Co-, Ni- based layered oxides. However, “intrinsic” high-Tc superconductivity above the 30 Kelvin range has never been observed in another oxide without copper. The unfathomable uniqueness of copper in the electron pairing mechanism has therefore been a longstanding mystery in condensed matter physics. “Is high-Tc unconventional superconductivity unique to copper?”
Here, I propose and demonstrate that (1) superconductivity is common in the periodic table of elements; (2) a model to increase the energy scale of superconductivity (Tc) in a general layered system; and therefore, the logical implication is “high-Tc superconductivity is ubiquitous”. Following this proposition, we made the first demonstration in a layered nickel oxide which high-Tc superconductivity is observed without the need for pressure, strain, or field modulation.
报告人简介：
S. Lin Er Chow is a Presidential Graduate Fellow. He is the youngest winner of the Best Graduate Researcher Award during his PhD at the National University of Singapore. He received the Highest Distinction (Honours.) for both B.Sc and B.Eng degrees and was a Physics Olympian. He leads and supervises the superconductivity research team of more than ten research fellows and students at NUS Ariando group. He is an invited speaker at multiple international conferences including the European Conference on Applied Superconductivity (EUCAS) and the International Workshop on High-Tc Nickel Oxide Superconductors.
腾讯会议ID: 733-720-170
邀请人：王宁宁
联系电话：82649290
