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General Questions and Answers / Number of kpoints needed for GMR structures
« on: February 24, 2011, 13:44 »
Dear colleagues,
I am now working on the transmission properties of GMR junctions. I have found in ATK manual(version 2008.10) that, for TMR structure Fe/MgO/Fe, it is always necessary to include large number of kpoints for transmission spectrum calculation (k-mesh 301x301 as in the tutorial).
Here is my question : what about GMR structures, say, Co/Cu/Co , or Co2MnSi/Ag/Co2MnSi which has demostrated the largest MR ratio experimentally? Approximately how many kpoints are needed for such systems when calculating transmission spectrum or IV curve?
Manny thanks.
baizq
I am now working on the transmission properties of GMR junctions. I have found in ATK manual(version 2008.10) that, for TMR structure Fe/MgO/Fe, it is always necessary to include large number of kpoints for transmission spectrum calculation (k-mesh 301x301 as in the tutorial).
Here is my question : what about GMR structures, say, Co/Cu/Co , or Co2MnSi/Ag/Co2MnSi which has demostrated the largest MR ratio experimentally? Approximately how many kpoints are needed for such systems when calculating transmission spectrum or IV curve?
Manny thanks.
baizq