Investigation of Quantum Effects in Carbonaceous Materials Near the Metal-Insulator Transition by Means of THz Photoconductivity

• Authors: V. Dorosinets , V. Ksenevich , D. Seliuta , Z. Martūnas , G. Valušis
• Languages of publication: EN

Abstracts

EN

A series of carbonaceous fibers with conductivity tuned to the metal-insulator transition were prepared by heat treatment of chemically modified polymer precursors. Peculiar behaviour of the resistivity versus temperature dependence R(T) at low temperatures suggests quantum corrections to the Drude conductivity due to weak localization and electron-electron interaction dominating in the conductivity. The THz conductivity method is employed to study the modification of the density of states and provides evidence for a strong change in density of states at the Fermi level caused by the quantum effects.

Keywords

EN

71.30.+h; 72.15.Rn

Discipline

• 71.30.+h: Metal-insulator transitions and other electronic transitions
• 72.15.Rn: Localization effects (Anderson or weak localization)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 3
• Pages: 875-878

Dates

published

2008-03

received

2007-08-26

Contributors

author

V. Dorosinets

• Belarussian State University, Nezaliezhnasti av.4, 220030 Minsk, Belarus

author

V. Ksenevich

• Belarussian State University, Nezaliezhnasti av.4, 220030 Minsk, Belarus

author

D. Seliuta

• Semiconductor Physics Institute, A. Goštauto 11, LT- 01108 Vilnius, Lithuania

author

Z. Martūnas

• Semiconductor Physics Institute, A. Goštauto 11, LT- 01108 Vilnius, Lithuania

author

G. Valušis

• Semiconductor Physics Institute, A. Goštauto 11, LT- 01108 Vilnius, Lithuania

References

• 1. I. Bashmakov, V. Dorosinets, M. Lukashevich, A. Mazanik, T. Tihonova, T. Zabel, B. Wiedenhorst, H. Micklitz, J. Mater. Res. 16, 2832 (2001)
• 2. P.A. Lee, T.V. Ramakrishnan, Rev. Mod. Phys. 57, 287 (1985)
• 3. G. Du, V.N. Prigodin, A. Burns, J. Joo, C.S. Wang, A.J. Epstein, Phys. Rev. B 58, 4485 (1998)

Identifiers

DOI

10.12693/APhysPolA.113.875