Counterintuitive effects of isotopic doping on the phase diagram of H <sub>2</sub> –HD–D <sub>2</sub> molecular alloy
Xiaodi Liu, Philip Dalladay‐Simpson, Ross T. Howie, Hui-Chao Zhang, Wan Xu, Jack Binns, Graeme J. Ackland, Ho‐kwang Mao, Eugene Gregoryanz
Abstract
) range. We find that mixtures of [Formula: see text], HD, and [Formula: see text] behave as an isotopic molecular alloy (ideal solution) and exhibit symmetry-breaking phase transitions between phases I and II and phase III. Surprisingly, all transitions occur at higher pressures for the alloys than either pure [Formula: see text] or [Formula: see text] This runs counter to any quantum effects based on isotope mass but can be explained by quantum trapping of high-kinetic energy states by the exchange interaction.
Topics & Concepts
CounterintuitivePhase diagramAlloyDopingPhase (matter)DiagramMaterials scienceCrystallographyChemistryChemical physicsPhysicsCondensed matter physicsMathematicsMetallurgyStatisticsQuantum mechanicsQuantum, superfluid, helium dynamicsAdvanced Chemical Physics StudiesHigh-pressure geophysics and materials