scholarly journals Critical exponents and fine-grid vortex model of the dynamic vortex Mott transition in superconducting arrays

2019 ◽  
Vol 100 (10) ◽  
Author(s):  
Enzo Granato
Keyword(s):  
Critical Exponents ◽  
Mott Transition ◽  
Fine Grid ◽  
Vortex Model ◽  
Superconducting Arrays

Dynamic vortex Mott transition in triangular superconducting arrays

2021 ◽  
Author(s):  
Pei Zi-Xi ◽  
Guo Wei-Gui ◽  
Qiu Xiang-Gang
Keyword(s):  
Magnetic Fields ◽  
Differential Resistance ◽  
Mott Transition ◽  
Top Down ◽  
Au Film ◽  
Magnetic Flux Quantum ◽  
Universality Classes ◽  
Potential Landscape ◽  
Superconducting Arrays ◽  
A Current

Abstract The proximity-coupled superconducting island arrays on a metallic film provide an ideal platform to study the phase transition of vortex states under mutual interactions between the vortex and potential landscape. We have developed a top-down microfabrication process for Nb island arrays on Au film by employing an Al hard mask. A current-induced dynamic vortex Mott transition has been observed under the perpendicular magnetic fields of $f$ magnetic flux quantum per unit cell, which is characterized by a dip-to-peak reversal in differential resistance $dV/dI$ vs. $f$ curve with the increasing current. The $dV/dI$ vs. $I$ characteristics show a scaling behavior near the magnetic fields of $f=\frac{1}{2}$ and $f=1$, with the critical exponents $\varepsilon$ of 0.45 and 0.3 respectively, suggesting different universality classes at these two fields.

Critical exponents for Ising-like systems on Sierpinski carpets

1987 ◽  
Vol 48 (4) ◽  
pp. 553-558 ◽  
Author(s):  
B. Bonnier ◽  
Y. Leroyer ◽  
C. Meyers
Keyword(s):  
Critical Exponents ◽  
Sierpinski Carpets

scholarly journals CO$$_{2}$$ Convection in Hydrocarbon Under Flowing Conditions

2021 ◽  
Author(s):  
Trine S. Mykkeltvedt ◽  
Sarah E. Gasda ◽  
Tor Harald Sandve
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Flow Behavior ◽  
Cost Effective ◽  
Fine Grid ◽  
Cost Effective Method ◽  
Gravity Effects ◽  
Petroleum Resources ◽  
Nearby Point ◽  
Diffusive Processes

AbstractCarbon-neutral oil production is one way to improve the sustainability of petroleum resources. The emissions from produced hydrocarbons can be offset by injecting capture CO$$_{2}$$ 2 from a nearby point source into a saline aquifer for storage or a producing oil reservoir. The latter is referred to as enhanced oil recovery (EOR) and would enhance the economic viability of CO$$_{2}$$ 2 sequestration. The injected CO$$_{2}$$ 2 will interact with the oil and cause it to flow more freely within the reservoir. Consequently, the overall recovery of oil from the reservoir will increase. This enhanced oil recovery (EOR) technique is perceived as the most cost-effective method for disposing captured CO$$_{2}$$ 2 emissions and has been performed for many decades with the focus on oil recovery. The interaction between existing oil and injected CO$$_{2}$$ 2 needs to be fully understood to effectively manage CO$$_{2}$$ 2 migration and storage efficiency. When CO$$_{2}$$ 2 and oil mix in a fully miscible setting, the density can change non-linearly and cause density instabilities. These instabilities involve complex convective-diffusive processes, which are hard to model and simulate. The interactions occur at the sub-centimeter scale, and it is important to understand its implications for the field scale migration of CO$$_{2}$$ 2 and oil. In this work, we simulate gravity effects, namely gravity override and convective mixing, during miscible displacement of CO$$_{2}$$ 2 and oil. The flow behavior due to the competition between viscous and gravity effects is complex, and can only be accurately simulated with a very fine grid. We demonstrate that convection occurs rapidly, and has a strong effect on breakthrough of CO$$_{2}$$ 2 at the outlet. This work for the first time quantifies these effects for a simple system under realistic conditions.

Pruned Distributed and Parallel Subarray Beamforming for 3-D Underwater Imaging With Fine-Grid Sparse Arrays

2021 ◽  
pp. 1-16
Author(s):  
Dongdong Zhao ◽  
Peng Chen ◽  
Yingtian Hu ◽  
Ronghua Liang ◽  
Haixia Wang ◽  
...  
Keyword(s):  
Underwater Imaging ◽  
Fine Grid ◽  
Sparse Arrays ◽  
Subarray Beamforming

scholarly journals Interacting stochastic topology and Mott transition from light response

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Philipp W. Klein ◽  
Adolfo G. Grushin ◽  
Karyn Le Hur
Keyword(s):  
Light Response ◽  
Mott Transition
Sign in / Sign up

Export Citation Format

Share Document