Many electron theory of 1/f-noise in hopping conductivity

Many Electron Theory

Hopping Conductivity in Single Crystals (Cd0.6Zn0.32Mn0.08)3As2 (RESEARCH NOTE)

The growth processes of Tetragonal single crystals of solid solution (Cd0.6Zn0.32Mn0.08)3As2, space group P42/nmc, has been synthesized by Bridgman method. Conductivity and magnetoresistance of (Cd0.6Zn0.32Mn0.08)3As2 were measured in the range 1.6K to 300K and in magnetic field up to 25 T. Crossover from Mott variable-range-hopping conductivity mechanism close to helium temperatures. In this w...

Hopping Conductivity in Granular Metals

)Work supported by the National Science Foundation. *Alfred P. Sloan Research Fellow. E. F. Gross, Vsp. Fiz. Nauk 76, 433 (1962), and 103, 431 (1971) [Sov. Phys. Usp. 5, 195 (1962) and 14, 104 {1971)). A. Compaan and H. Z. Cuxnmins, Phys. Rev. B 6, 4753 (1972). Y. Petroff, P. Y. Yu, and Y. B. Shen, Phys. Bev. Lett. 29, 1558 (1972). P. Y. Yu, Y. R. Shen, Y. Petroff, and L. M. Falicov, Phys. Rev....

Many-electron conductivity of a non-degenerate 2D electron liquid in strong magnetic fields

We study the frequency-dependent conductivity of a nondegenerate two-dimensional electron system (2DES) in a quantizing magnetic field in the presence of weak short-range disorder. The 2DES is correlated, forming a liquid, which makes it necessary to account for electron–electron interaction (EEI) nonperturbatively. In strong magnetic fields, the low-frequency conductivity can be expressed pert...

MAGNETORESISTANCE AND HOPPING CONDUCTIVITY IN LaMnO3+δ

Resistivity, ρ (T), of LaMnO3+δ displays between δ = 0 − 0.154 an activated behavior both above and below the paramagnetic (PM) to ferromagnetic transition temperature, TC. The relative magnetoresistance at 8 T reaches the values of – 88 % near TC and – 98 % at T ≈ 20 K. In the PM phase ρ (T) satisfies between TC ~130 − 160 K and Tv ∼ 250 − 270 K the Shklovskii – Efros-like variable-range hoppi...