Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session B36: Room temperature superconductivity in superhydrides at extreme pressures
11:15 AM–2:15 PM,
Monday, March 2, 2020
Sponsoring Units: DCOMP DCMP
Chair: Renata Wentzcovitch, Columbia Univ
Abstract: B36.00001 : Clathrate Superhydrides Under High Pressure: A Class of Extraordinarily Hot Conventional Superconductors
View Presentation Abstract
We recently found a general phenomenon on the common formation of clathrate structures at high pressure in rare earth (RE) superhydrides having three stoichiometries of REH6, REH9, and REH10, some of which exhibit high-T superconductivity2. Subsequent experiments synthesized the predicted clathrate YH6, YH9, and LaH10 with the measured Tc values at 224, 243, and 260 K, respectively, setting up Tc records among known superconductors. These discoveries open up the door of achieving Room-T superconductors.
In the talk, I will give an overview on the current status of research progress on superconductive hydrides, and then discuss the design principle for achieving Room-T superhydrides. As an example, our recent prediction on clathrate superhydride in Li-Mg-H ternary system3 with a predicted Tc at ~400 K will be discussed.
1Wang, et al., PNAS 109, 6463 (2012)
2Peng, et al., PRL 119, 107001 (2017)
3Sun, et al., PRL 123, 097001 (2019)
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