Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202313679
Keywords
Cohesive energies; Cuboidal phase transitions; Dispersion corrections; Groups 1 and 11 elements; Relativistic effects
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This study investigates the differences in crystalline structures between Group 1 and Group 11 elements using relativistic density functional theory. The results show that many-body effects, vibrational contributions, and dispersion interactions play a crucial role in explaining these differences.
Why the Group 1 elements crystallize in the body-centered cubic (bcc) structure, and the iso-electronic Group 11 elements in the face-centered cubic (fcc) structure, remains a mystery. Here we show that a delicate interplay between many-body effects, vibrational contributions and dispersion interactions obtained from relativistic density functional theory offers an answer to this long-standing controversy. It also sheds light on the Periodic Table of Crystal Structures. A smooth diffusionless transition through cuboidal lattices gives a detailed insight into the bcc -> fcc phase transition for the Groups 1 and 11 elements. Relativistic density functional calculations for the cuboidal phase transition show that small effects such as dispersion interactions and phonon contributions can tip the balance between the body-centered and face-centered cubic structures shedding light into the difference between the Groups 1 and 11 elements in the Periodic Table.image
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