Transverse resistance in HoBa2Cu3O7−δ single crystals

The transverse electrical resistance of HoBa2Cu3O[Formula: see text] single crystals is investigated in the temperature range [Formula: see text] for optimally-doped [Formula: see text] and oxygen-poor [Formula: see text] samples. With decreasing temperature, the resistivity of the optimally-doped samples has been found to transit from the regime of scattering on phonons and defects to the regime of “semiconductor” character and, near [Formula: see text], of the fluctuation conductivity. The oxygen-poor samples have been revealed to exhibit only a variable range hopping conductivity of “semiconductor” character, which near [Formula: see text] transits into the fluctuation conductivity. A significant anisotropy of the residual resistivity and characteristics of the fluctuation conductivity is observed for samples of both types.

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Variable-range hopping conductivity in Cu2ZnGeSe4 single crystals

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2014.04.004 ◽

2014 ◽

Vol 127 ◽

pp. 87-91 ◽

Cited By ~ 9

Author(s):

M. Guc ◽

K.G. Lisunov ◽

E. Hajdeu ◽

S. Levcenko ◽

V. Ursaki ◽

...

Keyword(s):

Single Crystals ◽

Variable Range Hopping ◽

Hopping Conductivity ◽

Variable Range

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Magnetic field and temperature dependences of the electrical resistance of onion structure carbon

Siberian Journal of Physics ◽

10.54362/1818-7919-2008-3-2-95-98 ◽

2010 ◽

Vol 3 (2) ◽

pp. 95-98

Author(s):

Evgeny N. Tkachev ◽

Anatoliy I. Romanenko ◽

Olga B. Anikeeva ◽

Timofey I. Buryakov ◽

Kamil R. Zhdanov ◽

...

Keyword(s):

Magnetic Field ◽

Physical Properties ◽

Fermi Level ◽

Density Of States ◽

Electrical Resistance ◽

Variable Range Hopping ◽

Hopping Conductivity ◽

Variable Range ◽

Localization Radius ◽

Temperature Dependences

In this paper electro physical properties of samples of onion-like carbon have been investigated. Samples have been synthesized by method of thermal graphitization of nanodiamonds. 1D Mott variable-range hopping conductivity has been observed for temperature dependences of resistance of nanoonions volume samples at temperature range 4.2 K – 300 K. Also second-degree increase of positive magnetoresistance up to 6 tesla has been revealed. Some coefficients such as localization radius a, density of states on Fermi level N(EF) have been estimated.

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Variable range hopping conductivity at low temperatures in CuGaS2 single crystals

physica status solidi (c) ◽

10.1002/pssc.201400339 ◽

2015 ◽

Vol 12 (6) ◽

pp. 789-792

Author(s):

N. A. Abdullayev ◽

Kh. V. Aliquliyeva ◽

I. Qasimoglu ◽

T. G. Kerimova ◽

I. A. Mamedova

Keyword(s):

Single Crystals ◽

Low Temperatures ◽

Variable Range Hopping ◽

Hopping Conductivity ◽

Variable Range

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Transverse conductivity and the pseudogap in YBCO single crystals irradiated with fast electrons

Modern Physics Letters B ◽

10.1142/s0217984919502336 ◽

2019 ◽

Vol 33 (20) ◽

pp. 1950233

Author(s):

G. Ya. Khadzhai ◽

R. V. Vovk ◽

Yu. V. Litvinov ◽

V. V. Sklyar ◽

O. V. Dobrovolskiy

Keyword(s):

Single Crystals ◽

Electrical Resistance ◽

Irradiation Dose ◽

Charge Carriers ◽

Variable Range Hopping ◽

Fast Electrons ◽

Variable Range ◽

Before And After ◽

Temperature Dependences ◽

Transverse Conductivity

Temperature dependences of the electrical resistance along the c-axis of [Formula: see text] single crystals are investigated before and after irradiation with electrons at 0.5–2.5 MeV energies. The irradiation was done at [Formula: see text] K and the irradiation dose was varied from [Formula: see text] to [Formula: see text]. An enhancement of the charge carriers localization with increase of the irradiation dose has been revealed. A crossover from the pseudogap (PG) regime to the variable-range hopping conductivity has been observed.

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Conductivity Study of Co3O2BO3 and Co3-xFexO2BO3 Oxyborates

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.152-153.104 ◽

2009 ◽

Vol 152-153 ◽

pp. 104-107 ◽

Cited By ~ 8

Author(s):

N.V. Kazak ◽

N.B. Ivanova ◽

V.V. Rudenko ◽

S.G. Ovchinnikov ◽

A.D. Vasil’ev ◽

...

Keyword(s):

Crystal Structure ◽

Experimental Data ◽

Electrical Resistivity ◽

Single Crystals ◽

Temperature Region ◽

Electric Properties ◽

Variable Range Hopping ◽

Hopping Conductivity ◽

Variable Range ◽

The Difference

Single crystals of cobalt oxyborates Co3O2BO3 and Co3-xFexO2BO3 were synthesized. The crystal structure and electric properties were investigated. The difference in the electrical resistivity behaviors was found. For parent Co3O2BO3 nor simple activation law, nor Mott variable range hopping (VRH) are acquirable to describe the experimental data in wide temperature region. In contrast for Co3-xFex O2BO3 Mott’s variable-range hopping conductivity clearly dominates.

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