Gothenburg Mesoscopic lecture 

Titel: “The never-ending frontier of advancing the superconductivity Tc to a higher record value of 149 K at ambient without pressure”

Talare: Ching W (Paul) Chu, University of Houston, and Texas Center for Superconductivity.

Abstract: 

The search for higher Tc has provided the essential impetus for the continuous interest and efforts in superconductivity science and technology research for more than a century. Great progress has been made. Unfortunately, all record high Tc’s in different compound systems are achieved only under high pressures, e.g. 163 K in stable cuprate HBCCO under 31 GPaa and 260 K in unstable hydride LaH10 under 180-200 GPab. The high pressure required to achieve these high Tc’s has impeded the development of superconductivity science and application. Recently, we have successfully alleviated this impasse by achieving a record-high Tc of 151 K in HBCCO at ambient pressure via the use of a Pressure Quench Protocol (PQP). In this Lecture, I shall present our experimental results and discuss the rationale, the execution and the potential implications of PQP in the development of high-temperature superconductors and compounds with significant properties other than superconductivity in their metastable states.

a L. Gao et al. PRB50, 4260(R) (1994)

b M. Somayazulu et al. PRL 122, 027001(2019)

The Göteborg Mesoscopic Lectures are sponsored by the Royal Swedish Academy of Sciences through its Nobel Institute of Physics. Further information by Tord Claeson, Per Delsing, or Mats Jonson