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1600682813

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11Â¥: Originally posted by ÖìÊ®Èý at 2014-08-13 21:37:56
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12Â¥2014-08-13 22:25:56
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metaliium

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1600682813: ½ð±Ò+6 2014-08-14 08:18:29
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13Â¥: Originally posted by metaliium at 2014-08-14 02:50:33
ÓÐÊ²Ã´Ææ¹ÖµÄ£¿¶ÔÒ»¸öÃæÇó¡°Ìå»ý¡±ÄDz»¾ÍÊÇÃæ»ýÁËô£¬ÌåÃܶȺÍÃæÃܶȵÄÇø±ð£¬µ¥Î»±¾À´¾ÍÓ¦¸Ã²»Ò»Ñù¡£¡£¡£

I see !Thanks a lot!
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14Â¥2014-08-14 08:19:00
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peterflyer

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peterflyer


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°´ËµÔØÁ÷×ÓŨ¶ÈµÄµ¥Î»ÊÇcm^-3,ÒòΪʯīϩÊǵ¥²ãʯīƬ£¬ºñ¶ÈΪÒÑÖª¶¨Öµ£¬ÔÝÇÒ¿ÉÒÔÓÃcm^-2×÷ÔØÁ÷×ÓŨ¶ÈµÄµ¥Î»£¬ÆäʵËüÒ²Ó¦¸ÃºÍǰÕßÒ»ÑùµÄÓÃcm^-3¡£
15Â¥2014-08-14 11:56:05
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1600682813

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15Â¥: Originally posted by peterflyer at 2014-08-14 11:56:05
°´ËµÔØÁ÷×ÓŨ¶ÈµÄµ¥Î»ÊÇcm^-3,ÒòΪʯīϩÊǵ¥²ãʯīƬ£¬ºñ¶ÈΪÒÑÖª¶¨Öµ£¬ÔÝÇÒ¿ÉÒÔÓÃcm^-2×÷ÔØÁ÷×ÓŨ¶ÈµÄµ¥Î»£¬ÆäʵËüÒ²Ó¦¸ÃºÍǰÕßÒ»ÑùµÄÓÃcm^-3¡£

That is not the story.
the difference in the unit of the conductance just results from the 2-dimensional nature of graphene.

For 3-dimensional bulk materials, the unit of conductance is [1/(Ohm x Meter)], as derived from a charge carrier density of [Coulomb/Meter^3]. The latter definition, i.e. charge per volume, makes no sense for a 2-dimensional sheet of material, such as graphene.

Calculating the conductance for a 2-dimensional sheet with with a charge carrier density in terms of charge per area, i.e. [Coulomb/meter^2], then results in [1/Ohm] as the unit of conductance. In the 2-dimensional case, the units of conductance and conductivity are the same. Don¡ät confuse!

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16Â¥2014-08-14 12:41:36
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ÖìÊ®Èý

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