Synthesis and superconductivity in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mi>La</mml:mi><mml:mo>,</mml:mo><mml:mi>Ca</mml:mi></mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:msub><mml:mi mathvariant="normal">H</mml:mi><mml:mn>10</mml:mn></mml:msub></mml:mrow></mml:math> under high pressure

Abstract

The discovery of binary lanthanum hydrides provides a platform for exploring ternary hydrides with excellent properties. Here, the authors synthesize two lanthanum-calcium hydrides with superconducting critical temperature (${T}_{c}$) of 247 and 230 K, respectively. The results show that Ca doping has a negligible effect on the ${T}_{c}$ of LaH${}_{10}$, but affects the stability of the structure, suggesting that Ca may not be an ideal dopant. This study will help the future search for room-temperature superconductors in more diverse hydride materials.

Topics & Concepts