Electrophysical Properties of Onion-Like Carbon
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Translated
|
| Journal |
Russian Physics Journal
ISSN: 1064-8887
, E-ISSN: 1573-9228
|
| Output data |
Year: 2016,
Volume: 59,
Number: 2,
Pages: 171-176
Pages count
: 6
DOI:
10.1007/s11182-016-0756-1
|
| Tags |
electrical resistivity, magnetoresistivity, onion-like carbon |
| Authors |
Tkachev E.N.
1
,
Romanenko A.I.
1,2
,
Zhdanov K.R.
1
,
Anikeeva O.B.
1
,
Buryakov T.I.
3
,
Kuznetsov V.L.
4,5
,
Moseenkov S.I.
4
|
| Affiliations |
| 1 |
A. V. Nikolaev Institute of Inorganic Chemistry of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
|
| 2 |
National Research Tomsk State University, Tomsk, Russia
|
| 3 |
V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University, Tomsk, Russia
|
| 4 |
G. K. Boreskov Institute of Catalysis of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
|
| 5 |
Novosibirsk State University, Novosibirsk, Russia
|
|
Funding (3)
|
1
|
Federal Agency for Scientific Organizations
|
V.45.3.5.
|
|
2
|
Russian Foundation for Basic Research
|
14-03-31355
|
|
3
|
Russian Foundation for Basic Research
|
15-32-50712
|
The paper examines electrophysical properties of onion-like carbon (OLC) samples, where particles have the average size of 4–8 nm and are formed by 5–10 nested fullerene-like spheres connected by 1-3 common curved graphene shells into aggregates with a size of 50–300 nm. We measured the temperature dependence of electrical resistance from 4.2 to 300 K and dependence of magnetoresistance in magnetic fields up to 6 T at the temperature of 4.2 K. Temperature dependences of electrical resistance of samples can be described within the framework of the Mott law with variable hop length for the one-dimensional case or within the framework of the Efros–Shklovskii Coulomb gap. We observed the quadratically increasing positive magnetoresistance up to 6 T associated with compression of wave functions of conduction electrons. Negative magnetoresistance was observed in the range of magnetic fields up to 1–2 T in the case of some samples. This is due to the fact that magnetic field suppresses the contributions to magnetoresistance made by interference effects in the area of hopping conductivity. The measurements were used to estimate the localization radius that is comparable to the diameter of OLC particles (nano-onions).