Abstract
The second-order elastic constants (SOECs) and third-order elastic constants (TOECs) of superconducting MgB2 are investigated by first principles methods combined with homogeneous deformation theory. The Anderson-Grüneisen parameter is obtained from the SOECs and TOECs. The obtained value is 2.13, that is in consistent with the experimental result. The effective elastic constants and Debye temperature are also predicted from SOECs and TOECs, which increase with the increasing of pressure.
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Acknowledgments
This work is supported by the Natural Science Foundation of China (11104361), State Key Laboratory of Coal Mine Disaster Dynamics and Control in Chongqing University (2011DA105287FW201210), and the Fundamental Research Funds for the Central Universities(CDJZR14328801)
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Wang, K., Wu, X., Li, W. et al. Third Order Elastic Constants and Debye Temperature of MgB2 Under Different Pressure: First-Principles Methods. J Supercond Nov Magn 28, 1483–1489 (2015). https://doi.org/10.1007/s10948-014-2927-z
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DOI: https://doi.org/10.1007/s10948-014-2927-z