AN EFFICIENT METHOD OF DETERMINING SUPERCONDUCTING TRANSITION TEMPERATURE Tc

2005 ◽  
Vol 19 (05) ◽  
pp. 221-224
Author(s):  
DEHUA LIN ◽  
CHAORONG ZHONG ◽  
ZHIFENG LI ◽  
BINGQUAN HU ◽  
XINGANG WU ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Influencing Factors ◽  
Efficient Method ◽  
Superconducting Transition Temperature ◽  
Simple Technique ◽  
Transition Temperatures ◽  
Superconducting Transition

In this paper, by using simple technique we introduce an efficient method of determining superconducting transition temperatures in experiment, we have also figured out the main influencing factors on the accuracy of Tc measurement. We present a useful relationship and the calculating formulae. This method is suited to determine superconducting transition temperatures in superconductors at temperatures of liquid He as well.

scholarly journals Pressure dependence of the superconducting transition temperatures in La1.85Sr0.15CuO4 to 8 GPa

1987 ◽  
Vol 2 (6) ◽  
pp. 783-785 ◽  
Author(s):  
D. Erskine ◽  
E. Hess ◽  
P. Y. Yu ◽  
A. M. Stacy
Keyword(s):  
Transition Temperature ◽  
Pressure Dependence ◽  
Superconducting Transition Temperature ◽  
Diamond Anvil Cell ◽  
Experimental Results ◽  
Transition Temperatures ◽  
Superconducting Transition ◽  
Diamond Anvil ◽  
Phonon Model

Pressure dependence of the superconducting transition temperature in La1.85Sr0.15CuO4 has been measured to 8 GPa using a diamond anvil cell. The experimental results are discussed within the conventional electron-phonon model of superconductivity.

scholarly journals Enhancing superconductivity in SrTiO3 films with strain

2019 ◽  
Vol 5 (4) ◽  
pp. eaaw0120 ◽  
Author(s):  
Kaveh Ahadi ◽  
Luca Galletti ◽  
Yuntian Li ◽  
Salva Salmani-Rezaie ◽  
Wangzhou Wu ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
Resistive State ◽  
Theoretical Studies ◽  
Oxide Materials ◽  
Transition Temperatures ◽  
Superconducting Transition ◽  
Oxide Superconductor ◽  
Localization Behavior ◽  
Intense Debate

The nature of superconductivity in SrTiO3, the first oxide superconductor to be discovered, remains a subject of intense debate several decades after its discovery. SrTiO3 is also an incipient ferroelectric, and several recent theoretical studies have suggested that the two properties may be linked. To investigate whether such a connection exists, we grew strained, epitaxial SrTiO3 films, which are known to undergo a ferroelectric transition. We show that, for a range of carrier densities, the superconducting transition temperature is enhanced by up to a factor of two compared to unstrained films grown under the same conditions. Moreover, for these films, superconductivity emerges from a resistive state. We discuss the localization behavior in the context of proximity to ferroelectricity. The results point to new opportunities to enhance superconducting transition temperatures in oxide materials.

scholarly journals Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic Disorder

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5830
Author(s):  
Andrzej Ślebarski ◽  
Maciej M. Maśka
Keyword(s):  
High Temperature ◽  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
High Temperature Superconductors ◽  
Superconducting Phase ◽  
Length Scale ◽  
Superconducting Transition ◽  
Atomic Disorder ◽  
Strong Inhomogeneity ◽  
Related Compounds

We investigated the effect of enhancement of superconducting transition temperature Tc by nonmagnetic atom disorder in the series of filled skutterudite-related compounds (La3M4Sn13, Ca3Rh4Sn13, Y5Rh6Sn18, Lu5Rh6Sn18; M= Co, Ru, Rh), where the atomic disorder is generated by various defects or doping. We have shown that the disorder on the coherence length scale ξ in these nonmagnetic quasiskutterudite superconductors additionally generates a non-homogeneous, high-temperature superconducting phase with Tc⋆>Tc (dilute disorder scenario), while the strong fluctuations of stoichiometry due to increasing doping can rapidly increase the superconducting transition temperature of the sample even to the value of Tc⋆∼2Tc (dense disorder leading to strong inhomogeneity). This phenomenon seems to be characteristic of high-temperature superconductors and superconducting heavy fermions, and recently have received renewed attention. We experimentally documented the stronger lattice stiffening of the inhomogeneous superconducting phase Tc⋆ in respect to the bulk Tc one and proposed a model that explains the Tc⋆>Tc behavior in the series of nonmagnetic skutterudite-related compounds.

Electron Irradiation of YBa2Cu3O7 at low Temperatures

1987 ◽  
Vol 99 ◽  
Author(s):  
B. Stritzker ◽  
W. Zander ◽  
F. Dworschak ◽  
U. Poppe ◽  
K. Fischer
Keyword(s):  
Transition Temperature ◽  
Electron Irradiation ◽  
Normal State ◽  
Low Temperatures ◽  
Superconducting Transition Temperature ◽  
Superconducting Transition ◽  
Radiation Induced ◽  
State Resistance ◽  
Normal State Resistance

ABSTRACTBulk samples of YBa2Cu3O7−x have been homogenously irradiated with 3 MeV electrons at temperatures below 20 K. Whereas the superconducting transition temperature, Tc, drops dramatically with increasing dose the width of the transition remains unchanged (Δ Tc ≤ 1.5 K). The normal state resistance at 100 K increases substantially during the electron irradiation. Several irreproducible experiments can be interpreted with a radiation induced, unstable increase of Tc.

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