Crystalline aluminum silicides with electride state and superconductivity under high pressure

Coexistence of superconductivity and electride states in Ca2H with an antifluorite-type motif under compression

“…89) and C2/ m Al 2 Si 3 . 90 Given that the excellent superconductivity in some hydrides can be retained under relatively lower pressures, 91,92 e.g., LaBH 8 (126 K at 50 GPa) 93 and LaBeH 8 (185 K at 20 GPa), 94 we concentrated on the evolution of the superconductivity of Fm 3m Ca 2 H electride under depressurized conditions. With decreasing pressure, the transition temperature of Ca 2 H shows a noticeable increase from 6.1 K at 1 Mbar to 9.6 K at 50 GPa, which is in stark contrast to the trends of superconducting electride Li 6 C 42 and P6/mmm Li 7 As.…”

High-Tc superconductivity of polyhydride Rb2MgH18 with a layered hydrogen structure at high pressure

“…The structure searches for Rb x Mg y H z (x = 1-2, y = 1-2, z = 1-4, 6, 8-10, 12, 16, 18, 24, 28) at 100, 200, and 300 GPa were carried out using a particle-swarm optimization algorithm implemented in the CALYPSO software, [45][46][47] which has been successfully applied to various high-pressure systems. [48][49][50][51][52][53] Simulated cells containing up to 62 atoms were adopted. The total number of searched structures in this work was around 151 000.…”

Superconductivity and superionic behaviors of Kagome lattices in Li–Si compounds under high pressure

“…13 Research on the relationship between ISQs and superconductivity in electrides is currently underway. [14][15][16][17] Liu et al 15 introduced a different type of p orbital electride, providing insights into the origin of ISQs and superconductivity, with a high T c of 41.36 K at 200 GPa. The effect of the dimension and shape of ISQs on T c has been progressively demonstrated.…”