Study on excess conductivity in YBCO + xAg composites

Bilal A. Malik; Gowher H. Rather; K. Asokan; Manzoor A. Malik

doi:10.1007/s00339-021-04448-2

Excess conductivity studies in the paracoherence region of Bi-Sr-Ca-Cu-O superconductors

Solid State Communications ◽

10.1016/0038-1098(95)00488-2 ◽

1995 ◽

Vol 96 (7) ◽

pp. 441-444 ◽

Cited By ~ 3

Author(s):

E. Isaac Samuel ◽

S. Ravi ◽

V. Seshu Bai

Keyword(s):

Excess Conductivity

Download Full-text

LIGHT-INDUCED EXCESS CONDUCTIVITY AND THE ROLE OF ARGON IN THE DEPOSITION OF DOPING-MODULATED AMORPHOUS SILICON SUPERLATTICES.

MRS Proceedings ◽

10.1557/proc-56-399 ◽

1985 ◽

Vol 56 ◽

Author(s):

F.-C. Su ◽

S. Levine ◽

P. E. Vanier ◽

F. J. Kampas

Keyword(s):

Amorphous Silicon ◽

Amorphous Semiconductor ◽

Excess Conductivity ◽

The Novel ◽

Semiconductor Superlattice ◽

Deposition Parameters ◽

Superlattice Structures ◽

Argon Dilution ◽

P Type

AbstractAmorphous semiconductor superlattice structures consisting of alternating n-type and p-type doped layers of hydrogenated amorphous silicon (a-Si:H) have been made by silane glow discharge in a single chamber system. These multilayered films show the novel phenomenon of light-induced excess conductivity (LEC) associated with a metastable state having a lifetime of order of days. This report shows that the LEC effect is quite dependent on the specific details of the deposition parameters, namely dilution of the silane with inert gas, substrate temperature and layer thickness. In order to investigate the origin of the LEC effect, argon dilution was used for specific regions of the structure. This experiment shows that the slow states are distributed throughout the layers, and are not concentrated at the interfaces.

Download Full-text

On the Fluctuation Induced Excess Conductivity in Stainless Steel Sheathed MgB2 Tapes

Journal of Materials ◽

10.1155/2013/898607 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 5

Author(s):

Suchitra Rajput ◽

Sujeet Chaudhary

Keyword(s):

Magnetic Field ◽

Experimental Data ◽

Stainless Steel ◽

Coherence Length ◽

Three Dimensional ◽

Excess Conductivity ◽

Scaling Functions ◽

Critical Fluctuations ◽

Scaling Models

We report on the analyses of fluctuation induced excess conductivity in the - behavior in the in situ prepared MgB2 tapes. The scaling functions for critical fluctuations are employed to investigate the excess conductivity of these tapes around transition. Two scaling models for excess conductivity in the absence of magnetic field, namely, first, Aslamazov and Larkin model, second, Lawrence and Doniach model, have been employed for the study. Fitting the experimental - data with these models indicates the three-dimensional nature of conduction of the carriers as opposed to the 2D character exhibited by the HTSCs. The estimated amplitude of coherence length from the fitted model is ~21 Å.

Download Full-text