scholarly journals Upper critical field for electrons in a two-dimensional lattice

1999 ◽  
Vol 60 (9) ◽  
pp. 6300-6303 ◽  
Author(s):  
Marcin Mierzejewski ◽  
Maciej M. Maśka
Keyword(s):  
Critical Field ◽  
Upper Critical Field ◽  
Two Dimensional ◽  
Dimensional Lattice

The Temperature of Berezinsky – Kosterlitz – Thouless Transition in Two-Dimensional Superconductor in an External Field

2014 ◽  
Vol 9 (3) ◽  
pp. 75-80
Author(s):  
Aleksandr Krinitsyn ◽  
Iliya Tikhomirov ◽  
Klimentiy Yugay
Keyword(s):  
Magnetic Field ◽  
Monte Carlo ◽  
External Magnetic Field ◽  
External Field ◽  
Critical Field ◽  
Applied Magnetic Field ◽  
Coherence Length ◽  
Upper Critical Field ◽  
Two Dimensional ◽  
Calculated Temperature

The Method of Monte-Carlo calculated temperature of Berezinsky – Kosterlitz – Thouless transition in twodimensional superconductor 2nd type in the presence of an external magnetic field. It is shown that near the upper critical field filling cells with a size of ξ × ξ relation, where ξ – coherence length at a given temperature, corresponds to half. It is also shown that ТBKT decreases with increasing interaction between the vortices and antivortices and increase of the external applied magnetic field

RESISTIVE UPPER CRITICAL FIELD OF SUPERCONDUCTING SPIN-LADDER Sr14-xCaxCu24O41

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3617-3622 ◽  
Author(s):  
T. NAKANISHI ◽  
N. MOTOYAMA ◽  
H. MITAMURA ◽  
N. TAKESHITA ◽  
H. TAKAHASHI ◽  
...  
Keyword(s):  
High Pressure ◽  
Critical Field ◽  
Pressure Range ◽  
Upper Critical Field ◽  
Anomalous Behavior ◽  
Spin Ladder ◽  
Two Dimensional ◽  
High Pressure Cell ◽  
Upward Curvature ◽  
Superconducting Oxides

We report the resistive upper critical field Hc2(T) of the hole-doped two-leg ladder Sr 14-x Ca x Cu 24 O 41(x=12) single crystal, which becomes superconducting with Tc~5 K in a pressure range above ~3.0 GPa . Using a newly developed compact high-pressure cell, the magneto-transport measurements have been performed at temperatures down to ~140 mK under high pressure above 3.5 GPa. It is found that Hc2 (perpendicular to the ladder Cu 2 O 3 plane) increases anomalously as the temperature is decreased having an upward curvature and shows no saturation down to T/T c ~ 0.03. Also, its temperature dependence is found to resemble that of the high-Tc superconducting oxide Tl 2 Ba 2 CuO 6. This fact suggests that the anomalous behavior of Hc2 has a common origin between the ladders and the two-dimensional high-Tc superconducting oxides.

Upper Critical Field in Two-Dimensional Superconductors

1983 ◽  
Vol 52 (4) ◽  
pp. 1352-1360 ◽  
Author(s):  
Sadamichi Maekawa ◽  
Hiromichi Ebisawa ◽  
Hidetoshi Fukuyama
Keyword(s):  
Critical Field ◽  
Upper Critical Field ◽  
Two Dimensional

scholarly journals Upper critical field in disordered two-dimensional superconductors

2000 ◽  
Vol 61 (9) ◽  
pp. 6352-6359 ◽  
Author(s):  
Robert A. Smith ◽  
Beccy S. Handy ◽  
Vinay Ambegaokar
Keyword(s):  
Critical Field ◽  
Upper Critical Field ◽  
Two Dimensional

Enhancement of critical temperature and upper critical field due to Nb substitution in Zr-V alloy superconductors

2020 ◽  
Author(s):  
Sabyasachi Paul ◽  
S. K. Ramjan ◽  
L. S. Sharath Chandra ◽  
Archna Sagdeo ◽  
M. K. Chattopadhyay
Keyword(s):  
Critical Temperature ◽  
Critical Field ◽  
Upper Critical Field

scholarly journals DISCRETE AND CONTINUUM APPROACHES TO THREE-DIMENSIONAL QUANTUM GRAVITY

1991 ◽  
Vol 06 (39) ◽  
pp. 3591-3600 ◽  
Author(s):  
HIROSI OOGURI ◽  
NAOKI SASAKURA
Keyword(s):  
Gauge Theory ◽  
Moduli Space ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Analogue Model ◽  
Gauge Invariant ◽  
Invariant Functions ◽  
Dimensional Lattice ◽  
Chern Simons ◽  
Dimensional Surface

It is shown that, in the three-dimensional lattice gravity defined by Ponzano and Regge, the space of physical states is isomorphic to the space of gauge-invariant functions on the moduli space of flat SU(2) connections over a two-dimensional surface, which gives physical states in the ISO(3) Chern–Simons gauge theory. To prove this, we employ the q-analogue of this model defined by Turaev and Viro as a regularization to sum over states. A recent work by Turaev suggests that the q-analogue model itself may be related to an Euclidean gravity with a cosmological constant proportional to 1/k2, where q=e2πi/(k+2).

scholarly journals Experimental and theoretical analysis of the upper critical field in ferromagnet–superconductor–ferromagnet trilayers

2013 ◽  
Vol 26 (8) ◽  
pp. 085003 ◽  
Author(s):  
E Antropov ◽  
M S Kalenkov ◽  
J Kehrle ◽  
V I Zdravkov ◽  
R Morari ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Critical Field ◽  
Upper Critical Field
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