Geometric dependence of transport and universal behavior in three dimensional carbon nanostructures
- Univ. of South Carolina, Columbia, SC (United States). Dept. of Physics and Astronomy
- Benedict College, Columbia, SC (United States). Dept. of Physics and Engineering
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
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. Here, our investigation in the magnetic fields (B) up to 18 T at temperatures (T) from 250 mK to 20 K 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.
- Research Organization:
- Univ. of South Carolina, Columbia, SC (United States). Dept. of Physics and Astronomy
- Sponsoring Organization:
- USDOE; National Science Foundation (NSF)
- Grant/Contract Number:
- NA0002630
- OSTI ID:
- 1468935
- Alternate ID(s):
- OSTI ID: 1325837
- Journal Information:
- Applied Physics Letters, Vol. 109, Issue 12; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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