131 citations
- National Center for Theoretical SciencesTW39 papers
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4 papers · 1 filter
A complete Raman mapping of phase transitions in Si under indentation
C. R. Das, H. C. Hsu, S. Dhara +7
Crystalline Si substrates are studied for pressure induced phase transformation under indentation at room temperature using Berkovich tip. Raman scattering study is used for the id…
Influence of sintering temperature on resistivity, magnetoresistance and thermopower of La0.67Ca0.33MnO3
G. Venkataiah, Y. K. Lakshmi, P. V. Reddy
A systematic investigation of La0.67Ca0.33MnO3 manganites has been undertaken, mainly to understand the influence of varying crystallite size (nanometer range) on electrical resist…
Recrystallization of epitaxial GaN under indentation
S. Dhara, C. R. Das, H. C. Hsu +6
We report recrystallization of epitaxial (epi-) GaN(0001) film under indentation.Hardness value is measured close to 10 GPa, using a Berkovich indenter. Pop-in burst in the loading…
Ab initio Studies of the Possible Magnetism in BN Sheet by Non-magnetic Impurities and Vacancies
Ru-Fen Liu, Ching Cheng
We performed first-principles calculations to investigate the possible magnetism induced by the different concentrations of non-magnetic impurities and vacancies in BN sheet. The a…