High-pressure superconducting phase diagram of 6Li: Isotope effects in dense lithium

High-pressure superconducting phase diagram of 6Li: isotope effects in dense lithium.

We measured the superconducting transition temperature of (6)Li between 16 and 26 GPa, and report the lightest system to exhibit superconductivity to date. The superconducting phase diagram of (6)Li is compared with that of (7)Li through simultaneous measurement in a diamond anvil cell (DAC). Below 21 GPa, Li exhibits a direct (the superconducting coefficient, α, T(c) proportional M(-α), is po...

Boron under Pressure: Phase Diagram and Novel High-pressure Phase

Boron has a unique chemistry, responsible for remarkable complexities even in the pure element. I review some of the history of the discovery of this element, and recent surprises found in boron under pressure. I discuss the recent discovery of a new high-pressure phase, γ-B28, consisting of icosahedral B12 clusters and B2 pairs in a NaCl-type arrangement: (B2)(B12), and displaying a significan...

Superconducting high pressure phase of germane.

High-pressure structures of germane (GeH4) are explored through ab initio evolutionary methodology to reveal a metallic monoclinic structure of C2/c (4 molecules/cell). The C2/c structure consists of layerlike motifs containing novel "H2" units. Enthalpy calculations suggest a remarkably wide decomposition (Ge+H2) pressure range of 0-196 GPa, above which C2/c structure is stable. Perturbative l...

Superconducting high-pressure phase of cesium iodide

Ying Xu,1 John S. Tse,1,2 Artem R. Oganov,3,4 Tian Cui,1 Hui Wang,1 Yanming Ma,1,* and Guangtian Zou1 1National Lab of Superhard Materials, Jilin University, Changchun 130012, People’s Republic of China 2Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E2 3Department of Materials, Laboratory of Crystallography, ETH Zurich, HCI G 515...

Thermodynamics of the UPt3 superconducting phase diagram.