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Messages - fedawy

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1
General Questions and Answers / Re: CNT DOS
« on: April 6, 2011, 07:59 »
Dear Sir
thanks for help. but i want ask about the unit of the DOS (i guess it must be per eV per unit volume). why the DOS in the attached figure is only per eV?

2
General Questions and Answers / CNT DOS
« on: April 3, 2011, 19:18 »
Dear Sir
the armchair (5,5) carbon nanotube exhibits a metalic behavior i.e (finite value of charge carriers in the DOS at the fermi level) but when i run it on ATK i found that DOS = zero around the fermi levelas shown in attached figure.why is that? 

3
General Questions and Answers / Re: GNR
« on: March 20, 2011, 06:24 »
thanks for help sir

4
General Questions and Answers / Re: GNR
« on: March 18, 2011, 11:10 »
Dear sir
for GNR, if n=11 and m=0
the E-K diagram must show (no band gap)
but when i run this configuration in ATK, i found non-zero band gap
is this write?

5
General Questions and Answers / GNR
« on: March 18, 2011, 09:07 »
in nanohub simulation,the (4,0) GNR act as a semiconductor, but when i use ATK it act as metal .why is that?

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