Yeu, In Won Park, Jaehong Han, Gyuseung Hwang, Cheol Seong Choi, Jung-Hae 2024-01-20T00:33:05Z 2024-01-20T00:33:05Z 2021-09-05 2017-09-06 2045-2322 https://pubs.kist.re.kr/handle/201004/122300 A detailed understanding of the atomic configuration of the compound semiconductor surface, especially after reconstruction, is very important for the device fabrication and performance. While there have been numerous experimental studies using the scanning probe techniques, further theoretical studies on surface reconstruction are necessary to promote the clear understanding of the origins and development of such subtle surface structures. In this work, therefore, a pressure-temperature surface reconstruction diagram was constructed for the model case of the InAs (001) surface considering both the vibrational entropy and configurational entropy based on the density functional theory. Notably, the equilibrium fraction of various reconstructions was determined as a function of the pressure and temperature, not as a function of the chemical potential, which largely facilitated the direct comparison with the experiments. By taking into account the entropy effects, the coexistence of the multiple reconstructions and the fractional change of each reconstruction by the thermodynamic condition were predicted and were in agreement with the previous experimental observations. This work provides the community with a useful framework for such type of theoretical studies. English NATURE PUBLISHING GROUP INITIO MOLECULAR-DYNAMICS TOTAL-ENERGY CALCULATIONS INAS(001) TRANSITIONS STATE PHASE GAAS Surface reconstruction of InAs (001) depending on the pressure and temperature examined by density functional thermodynamics Article 10.1038/s41598-017-10881-2 1 SCIENTIFIC REPORTS, v.7 SCIENTIFIC REPORTS 7 scie scopus 000409439900109 2-s2.0-85028937864 Multidisciplinary Sciences Science & Technology - Other Topics Article INITIO MOLECULAR-DYNAMICS TOTAL-ENERGY CALCULATIONS INAS(001) TRANSITIONS STATE PHASE GAAS Surface reconstruction InAs (001) density functional thermodynamics