scholarly journals Nonlinear Response of a Superconductor of the Bi-Sr-Ca-Cu-O System to an Alternating Magnetic Field in the Superconducting Transition Temperature Range

2018 ◽  
Vol 185 ◽  
pp. 08005
Author(s):  
Alexander Sergeev ◽  
Igor Golev ◽  
Victoria Gvozdevskaya ◽  
Anastasia Barkalova
Keyword(s):  
Magnetic Field ◽  
Nonlinear Response ◽  
Alternating Magnetic Field ◽  
Resistive State ◽  
Superconducting Transition ◽  
Critical Temperatures ◽  
Temperature Range ◽  
Nonlinear Properties ◽  
Current Voltage ◽  
Current Voltage Characteristics

The nonlinear response of the superconductor of the Bi-Sr-Ca-Cu-O system in the temperature range of the superconducting transition under the action of a harmonic alternating magnetic field is experimentally studied. For multiphase superconductors having in their volume regions with distinct critical temperatures, the effect of odd harmonics in the response signal is observed. The contribution of crystallites and the system of weak bonds between the crystallites in the nonlinear response is singled out. It was found that the nonlinear properties of the investigated samples in the resistive state are determined mainly by the nonlinear current-voltage characteristics of the system of weak bonds between the crystallites.

SOLITON TRAINS AND I–V CHARACTERISTICS OF LONG JOSEPHSON JUNCTIONS

1995 ◽  
Vol 05 (02) ◽  
pp. 491-505 ◽  
Author(s):  
A.G. MAKSIMOV ◽  
V.I. NEKORKIN ◽  
M.I. RABINOVICH
Keyword(s):  
Magnetic Field ◽  
Josephson Junction ◽  
Josephson Junctions ◽  
Gordon Equation ◽  
Alternating Magnetic Field ◽  
Equation Modeling ◽  
Sine Gordon Equation ◽  
Soliton Dynamics ◽  
Current Voltage ◽  
Current Voltage Characteristics

Soliton dynamics in a perturbed sine-Gordon equation modeling a long Josephson junction is investigated. Solitons are found to exist in both simple and chaotic forms. Soliton synchronization by an alternating magnetic field is analysed. Current-voltage characteristics of Josephson junction are plotted.

scholarly journals Влияние электронного и дырочного допирования на транспортные характеристики халькогенидных систем

2021 ◽  
Vol 63 (5) ◽  
pp. 606
Author(s):  
О.Б. Романова ◽  
C.C. Аплеснин ◽  
Л.В. Удод
Keyword(s):  
Magnetic Field ◽  
Electrical Properties ◽  
Hall Effect ◽  
Charge Carriers ◽  
Hall Constant ◽  
Temperature Range ◽  
Current Voltage ◽  
Semiconductor Compounds ◽  
Current Voltage Characteristics ◽  
Ohmic Conductivity

The electrical properties and the Hall effect in semiconductor compounds Ag0.01Mn0.99S and Tm0.01Mn0.99S have been studied in the temperature range 80–400 K in a magnetic field of 12 kOe. The mechanism of conduction is established, which depends on the type of doping and concentration from the current - voltage characteristics. At the replacement of manganese by silver, the Mott type was found, and the replacement by thulium causes ohmic conductivity. The mobility and type of charge carriers are found from the Hall constant.

scholarly journals Исследование критической температуры T-=SUB=-c-=/SUB=- гомофазных сверхпроводников (Bi-=SUB=-1.7-=/SUB=-Pb-=SUB=-0.3-=/SUB=-Sr-=SUB=-2-=/SUB=-Ca-=SUB=-(n-1)-=/SUB=-Cu-=SUB=-n-=/SUB=- O-=SUB=-y-=/SUB=- (n=3, 4, 5) и вольт-амперных характеристик сэндвич-пар полупроводник InP-сверхпроводник Bi/Pb (2223, 2234, 2245)

2019 ◽  
Vol 89 (4) ◽  
pp. 583
Author(s):  
Д.Д. Гуламова ◽  
А.В. Каримов ◽  
Д.Г. Чигвинадзе ◽  
С.М. Ашимов ◽  
О.В. Маградзе ◽  
...  
Keyword(s):  
Single Phase ◽  
Nominal Composition ◽  
Superconducting Transition ◽  
Critical Temperatures ◽  
Current Voltage ◽  
Anisotropic Superconductors ◽  
Bismuth Cuprates ◽  
Current Voltage Characteristics ◽  
The Relationship

AbstractThe electrophysical properties of semiconductor–superconductor sandwich pairs (InP–Bi/Pb 2223, 2234, 2245) are investigated, in which homophase superconductors based on bismuth cuprates with high reproducible critical temperatures of superconducting transition T _ c = 107–180 K are used. The advantage of melt solar technology for obtaining superconducting materials is demonstrated. The microstructure and phase composition of strongly anisotropic superconductors with nominal composition Bi_1.7Pb_0.3Sr_2Ca_( n _– 1)Cu_ n O_ y ( n = 3, 4, 5) are researched. A technique of experimental determination of superconducting transition critical temperatures T _ c in single-phase and homophase HTSC samples is presented. The current–voltage characteristics of InP–Bi/Pb pairs are investigated. The relationship between the electrical resistance of sandwich pairs and superconductor critical temperature T _ c is established.

Point-contact spectroscopy probing the NbSe3 CDW gap in different crystallographic orientations

2002 ◽  
Vol 12 (9) ◽  
pp. 119-122
Author(s):  
A. A. Sinchenko ◽  
P. Monceau
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
Applied Magnetic Field ◽  
Energy Gap ◽  
Point Contact ◽  
Point Contacts ◽  
Energy Gaps ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Crystallographic Orientations

We have measured the differential current-voltage characteristics of normal metal-NbSe3 direct point contacts (without insulating barrier) formed along different crystallographic orientations under applied magnetic field with different orientations. At low temperature two energy gaps, $\Delta_{p1}$ and $\Delta_{p2}$, corresponding to the high and the low-temperature CDW were observed simultaneously as a singulanty of the excess resistance which is attributed to an analog of Andreev reflection, in which the incident electron reflects on the Peierls energy gap barriers with its charge unchanged. An applied magnetic field up to 8.5 T does not lead to a change in the density of states and in the Peierls energy gaps, suggesting that the large magnetoresistance observed in NbSe3 might not result from the change in the CDW order parameter with magnetic field but rather from the increase of scattering of non-condensed to CDW carriers.

Resistive Width of Superconducting Transition in Titanium Nitride Thin Film

2011 ◽  
Vol 6 (2) ◽  
pp. 50-56
Author(s):  
Svetlana V. Postolova ◽  
Alexey Yu. Mironov ◽  
Tatyana I. Baturina
Keyword(s):  
Transition Temperature ◽  
Titanium Nitride ◽  
Electron Interaction ◽  
Nitride Film ◽  
Superconducting Transition ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Superconducting Fluctuations ◽  
Width Of Superconducting Transition ◽  
Titanium Nitride Film

The transition to the superconducting state of the ultrathin (5 nm thick) titanium nitride film was studied. It is found that the nonmonotonic temperature dependence of the resistance, R(T), is a consequence of competition between the contributions to conductivity from quantum corrections stemming from the electron-electron interaction in the diffusion and Cooper channels. It is shown that the appreciable decrease in the resistance at T > Tc (Tc is the superconducting transition temperature) results from the superconducting fluctuations. We present the results of the analysis of low-temperature (T < Tc ) current-voltage characteristics V(I). It is found that they follow the power-law behavior V∝ I α(T) , with α(T) increasing rapidly with the decreasing temperature. The Berezinskii-Kosterlitz-Thouless transition temperature, TBKT, and width of the superconducting transition ∆T = Tc − TБКТ were determined

SPACE-CHARGE EFFECT IN UNINTENTIONALLY N-DOPED SILICON

2012 ◽  
Vol 26 (08) ◽  
pp. 1250048 ◽  
Author(s):  
KANKAN CONG ◽  
YANG JI
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Space Charge ◽  
Space Charge Effect ◽  
Charge Effect ◽  
Temperature Range ◽  
Ohmic Behavior ◽  
Current Voltage ◽  
Doped Silicon ◽  
High Bias

We report experimental results on current–voltage characteristics of Au-Ti/n-Si/Au-Ti devices made on unintentionally n-doped silicon, which depend dramatically on temperature and external magnetic field. While such devices show Ohmic behavior in the temperature range 154–300 K, space-charge effect dominates at high bias voltages in the temperature range 77–154 K. In the later case, external magnetic field may increase its breakdown voltage, thus inducing large positive magnetoresistance similar to those reported by other groups.

Sign in / Sign up

Export Citation Format

Share Document