n-type vs. p-type semiconduction at high temperatures in oxide superconductors

Su, M.-Y.; Elsbernd, C. E.; Mason, Thomas O.

doi:10.1016/0921-4534(89)90178-0

Cited by 19 publications

(9 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…indicating that the plots of S against ln(σ) give a linear relation provided that values of µ in the system remain almost unchanged. This representation is known as the Jonker plots, and is often adopted as a useful way of characterizing thermoelectric materials [16]. The present results for thermoelectric properties are displayed in ferent from the theoretical prediction a = 86.2 µV/K, indicating that the ICO films act as "effectively-ideal" semiconductors with renormalized factor a.…”

Section: B Thermoelectric Propertiessupporting

confidence: 55%

Thermoelectric Properties in Transparent-Conductive Cerium-Doped In2O3 Films

Môri

Ueno

Uesugi

et al. 2012

e-J. Surf. Sci. Nanotechnol.

View full text Add to dashboard Cite

Thermoelectric properties are studied in Ce-doped In2O3 (ICO) films with Ce content x up to 9 at.% prepared by dc sputtering. Films of ICO are transparent in the visible light region (transmission more than 80%), having the highest room-temperature conductivity σ300=120 S/cm for x = 3 at.%. Thermoelectric power at room temperature S300 is well correlated to the electron density n, showing a linear relation of S300 vs. ln(σ300) in the Jonker fashion. The temperature dependence of the thermoelectric power S(T) is well described in terms of a simple percolation model characterized by a formula Sp(T) = AT + (B/T) + C with fitting parameters A, B and C. We define a percolation index as Γ300 = |B/(AT 2)| at T = 300 K, the doping dependence of which is found to be related to that of the power factor P300 = S 2 300 • σ300 in the ICO films. Similar correlations are also shown in bulk-systems composed of rare-earth metal oxides.

show abstract

Section: B Thermoelectric Propertiessupporting

confidence: 55%

Thermoelectric Properties in Transparent-Conductive Cerium-Doped In2O3 Films

Môri

Ueno

Uesugi

et al. 2012

e-J. Surf. Sci. Nanotechnol.

View full text Add to dashboard Cite

show abstract

“…We have shown that doping with alkali earth ions for La in La2 CuO4 increased the electrical conductivity, but seriously decreased the thermoelectric power [6]. The electrical properties of a layered perovskite La2 CuO4 having an infinite two-dimensional sheet of the Cu-O-Cu as a conducting path will be affected by substituting Cu sites with foreign 3d transition metals.…”

Section: Introductionmentioning

confidence: 99%

The effect of Cu-sites doping on electrical properties of La2CuO4 as thermoelectric material

Seok

Park

1995

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

The electrical conductivity and thermoelectric power for solid solutions of La2Cu0.gM0.104 (M = Mn, Fe, Co and Ni) prepared by polymeric precursor synthesis were measured between 300 and 1173 K to test its suitability as a thermoelectric material. Fe-, Mn-and Ni-doped compositions exhibited a metal-semiconductor transition with decreasing temperature, whereas Co doping showed a semiconducting behaviour in the entire temperature range of measurement. With Cu-sites doping in La2CuO4, power factors were not enhanced.

show abstract

“…In this research, (Pr-Y) and (PrBa 2 Cu 3 O 7 ) 1-z -Ag z (Pr-Ag) systems are compared on the basis of a thermoelectric-power study which is known to provide reliable information about normal-state properties of oxide superconductors [6,7]. We present results for the thermoelectric power against the conductivity in the Joker fashion [8] showing evidently the existence of the percolation threshold in each system. Analyses for temperature dependences of the resistivity and the thermoelectric power are also reported.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of thermoelectric properties in (Pr,Y)Ba₂Cu₃O₇ and PrBa₂Cu₃O₇–Ag percolative systems

Môri

Okano

Furuya

2006

Physica Status Solidi (a)

View full text Add to dashboard Cite

PACS 72. 74.25.Fy, 74.72.Bk Measurements of the temperature-dependent thermoelectric power S(T) and resistivity ρ(T) were performed to characterize two kinds of polycrystalline systems (Pr 1-x Y x )Ba 2 Cu 3 O 7 and Ag-doped PrBa 2 Cu 3 O 7 , each of which exhibits percolative behaviour at a certain doping level. At room temperature, Jonker plots of the thermoelectric power against logarithm of the conductivity in both systems show a similar tendency that two different fitting lines are intercrossed at the percolation thresholds. The ρ(T) behaviour below 100 K in each system with low dopant content obeys the variable-range-hopping conduction. Variations of S(T) in both systems could be reconciled with the Boson -Fermion theory based on the resonating-valence-bond model with reasonable dependences of fitting parameters upon doping.

show abstract

n-type vs. p-type semiconduction at high temperatures in oxide superconductors

Cited by 19 publications

References 9 publications

Thermoelectric Properties in Transparent-Conductive Cerium-Doped In<sub>2</sub>O<sub>3</sub> Films

Thermoelectric Properties in Transparent-Conductive Cerium-Doped In<sub>2</sub>O<sub>3</sub> Films

The effect of Cu-sites doping on electrical properties of La2CuO4 as thermoelectric material

A comparative study of thermoelectric properties in (Pr,Y)Ba₂Cu₃O₇ and PrBa₂Cu₃O₇–Ag percolative systems

Contact Info

Product

Resources

About

n-type vs. p-type semiconduction at high temperatures in oxide superconductors

Cited by 19 publications

References 9 publications

Thermoelectric Properties in Transparent-Conductive Cerium-Doped In<sub>2</sub>O<sub>3</sub> Films

Thermoelectric Properties in Transparent-Conductive Cerium-Doped In<sub>2</sub>O<sub>3</sub> Films

The effect of Cu-sites doping on electrical properties of La2CuO4 as thermoelectric material

A comparative study of thermoelectric properties in (Pr,Y)Ba2Cu3O7 and PrBa2Cu3O7–Ag percolative systems

Contact Info

Product

Resources

About

A comparative study of thermoelectric properties in (Pr,Y)Ba₂Cu₃O₇ and PrBa₂Cu₃O₇–Ag percolative systems