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Title
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Geometric dependence of transport and universal behavior in three dimensional carbon nanostructures.
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Creator
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Wang, Leizhi, Yin, Ming, Jaroszynski, Jan, Park, Ju-Hyun, Mbamalu, Godwin, Datta, Timir
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Abstract/Description
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Carbon nanostructures with the spherical voids exhibit interesting temperature and magnetic field dependent transport properties. By increasing the void size, the structures are tuned from metallic to insulating; in addition, the magnetoresistance (MR) is enhanced. Our investigation in the magnetic fields (B) up to 18 T at temperatures (T) from 250 mK to 20K shows that at high temperatures (T>2 K), the MR crosses over from quadratic to a non-saturating linear dependence with increasing...
Show moreCarbon nanostructures with the spherical voids exhibit interesting temperature and magnetic field dependent transport properties. By increasing the void size, the structures are tuned from metallic to insulating; in addition, the magnetoresistance (MR) is enhanced. Our investigation in the magnetic fields (B) up to 18 T at temperatures (T) from 250 mK to 20K shows that at high temperatures (T>2 K), the MR crosses over from quadratic to a non-saturating linear dependence with increasing magnetic field. Furthermore, all MR data in this temperature regime collapse onto a single curve as a universal function of B/T, following Kohler's rule. Remarkably, the MR also exhibits orientation insensitivity, i.e., it displays a response independent of the direction on the magnetic field. Published by AIP Publishing.
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Date Issued
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2016-09-19
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Identifier
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FSU_libsubv1_wos_000384558700054, 10.1063/1.4963261
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Format
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Citation
