Interpretation of temperature-dependent resistivity of electron-doped cuprates

Abstract

The temperature-dependent normal state resistivity of single-crystal Nd1.85Ce0.15CuO4−δ is theoretically analysed within the framework of the classical electron–phonon model of resistivity, i.e. the Bloch–Gruneisen model. Due to inherent acoustic (low-frequency) phonons (ωac) as well as high-frequency optical phonons (ωop), the contributions to the resistivity have first been estimated. The optical phonons of the oxygen-breathing mode yield a relatively larger contribution to the resistivity compared to the contribution of acoustic phonons. The contribution to resistivity estimated by considering both phonons, i.e. ωac and ωop, along with the zero limited resistivity, when subtracted from single-crystal data, infers a quadratic temperature dependence over most of the temperature range (25 ≤ T ≤ 300 K). The quadratic temperature dependence of ρdiff = [ρexp − {ρ0 + ρe-ph( = ρac + ρop)}] is understood in terms of electron–electron inelastic scattering. The comparison of single-crystal experimental data with the present analysis appears to be favourable.

Metallic and semi-conducting resistivity behaviour of La0.7Ca0.3−x K x MnO3 (x = 0.05, 0.1) manganites

“…On the other hand, at higher temperatures, the electron conduction is due to the activation above the mobility edge. The above results are consistent with previous work [11,[47][48][49].…”

“…However, the computed values of Debye and Einstein temperatures for La 1-x Na x MnO 3 manganites following the EIoIP approach yield consistent results [47][48][49] with the available experimental results. Furthermore, the optical phonon mode is obtained as x TO & 65.8 (65.7) meV and x LO & 68.8 (68.7) meV for x = 0.05 (0.1), respectively, consistent with the Raman spectroscopy results [4].…”

Structural and transport properties of La1−xAgxMnO3 (x=0.075, 0.1, 0.125 and 0.15) manganites

“…Eq. (3) in terms of acoustic phonon contribution yields the Bloch-Gruneisen function of temperature dependence resistivity [34,45,53]:…”

Spin Fluctuation Effect on Electrical Resistivity of La0.8Ca0.2MnO3 Manganite Nanoparticles

“…The best¯t method for obtaining the value of A ac , A op and B is consistent with the metallic conduction in nanoparticles and other materials. [15][16][17] The relative contribution to resistivity due to electron-electron and electron-phonon interaction along with the spin°uctuation induced resistivity of 70 nm nanoparticles of La 0:8 Ca 0:2 MnO 3 manganite is plotted in Fig. 1.…”

“…This feature is consistent with many metallic conductors in which free electron gas exhibits quadratic temperature dependence of resistivity. [15][16][17][18] The contributions of acoustic ð ac Þ and optical phonons ð op Þ towards resistivity are shown separately in Fig. 1.…”