skip to main content

DOE PAGESDOE PAGES

Title: Geometric dependence of transport and universal behavior in three dimensional carbon nanostructures

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.
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [3] ;  [2] ;  [1]
  1. Univ. of South Carolina, Columbia, SC (United States). Dept. of Physics and Astronomy
  2. Benedict College, Columbia, SC (United States). Dept. of Physics and Engineering
  3. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Publication Date:
Grant/Contract Number:
NA0002630
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 12; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of South Carolina, Columbia, SC (United States). Dept. of Physics and Astronomy
Sponsoring Org:
USDOE; National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1468935
Alternate Identifier(s):
OSTI ID: 1325837