2004/12/10 by Kyungsoo Ahn, Ahn, Kyungsoo, Reinhard K. Kremer +10
Chemistry · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Inorganic Chemistry and Materials #Iron-based superconductors research #Materials Science (cond-mat.mtrl-sci) #Rare-earth and actinide compounds #Superconductivity (cond-mat.supr-con) #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0412265
12 pages, 6 figures
arxiv created 2004/12/10 · openalex publication_date 2004/12/10 · arxiv updated 2009/12/01 · openalex created_date 2022/10/05 · openalex updated_date 2026/07/28
The structural properties under hydrostatic pressure up to 3 GPa of the\nlayered rare earth carbide halide superconductor Y2C2I2 are studied by neutron\npowder diffraction at room temperature. The compressibilities are anisotropic,\nsuch that the compressibility perpendicular to the layers being approximately\ntwice as large as within the layers. The atomic positional parameters\ndetermined from the powder diffraction patterns as a function of pressure were\nused as the basis for highly resolved electronic structure calculations. These\nreveal the electronic density of states at EF to increase with pressure. As is\nshown quantitatively, this effect outweighs the pressure induced lattice\nstiffening effects and is responsible for the pressure induced increase and\nsaturation of Tc towards 2 GPa.\n