B. Kohler et al., FORCE CALCULATION AND ATOMIC-STRUCTURE OPTIMIZATION FOR THE FULL-POTENTIAL LINEARIZED AUGMENTED PLANE-WAVE CODE WIEN, Computer physics communications, 94(1), 1996, pp. 31-48
Following the approach of Yu, Singh, and Krakauer [Phys, Rev. B 43 (19
91) 6411], we extended the linearized augmented plane wave code WIEN o
f Blaha, Schwarz, and coworkers by the evaluation of forces. In this p
aper we describe the approach, demonstrate the high accuracy of the fo
rce calculation, and use them for an efficient geometry optimization o
f poly-atomic systems.