β-Tin→imma→sh phase transitions of germanium
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
|Journal / Publication||Physical Review Letters|
|Publication status||Published - 30 Mar 2011|
|Link to Scopus||https://www.scopus.com/record/display.uri?eid=2-s2.0-79960043665&origin=recordpage|
New paths were designed for the investigations of the beta-tin -> Imma -> sh phase transitions in nanocrystalline Ge under conditions of hydrostatic stress. A second-order transition between the beta-tin and Imma phases was identified at 66 GPa, and a first-order transition between the Imma and sh phases was determined at 90 GPa. Superconductivity was obtained up to 190 GPa using the acquired structural data in first-principles calculations. This provides evidence that the standard electron-phonon coupling mechanism is responsible for superconductivity in Ge, as evidenced by the good agreement between the calculations and existing experiments.