Strong electron-lattice coupling in correlated intermetallic compounds near valence- and structural instabilities (A01+)

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The project A01 (Wolf/Lang) will study the close interlocking of electronic and lattice degrees of freedom upon pressure-tuning systems into the vicinity of phase transitions. Special attention will be devoted to the expected occurrence of critical elasticity around the valence transition in EuPd2Si2 and related variants. A second focus will be the possibility to induce novel phases, such as valence-fluctuation-induced superconductivity, near the transition associated with the collapse of the tetragonal unit cell in Eu(Fe1−xNix)2P2.