Consistent Low-Energy Reduction of the Three-Band Model for Electrons and Holes in Copper Oxides to the Effective t - J Model

1995 ◽  
pp. 443-448
Author(s):  
V. I. Belinicher ◽  
A. L. Chernyshev ◽  
L. V. Popovich
Keyword(s):  
Low Energy ◽  
Copper Oxides ◽  
Energy Reduction ◽  
Band Model

Consistent low-energy reduction of the three-band model for electrons and holes in copper oxides to the effective t-J model

1994 ◽  
Vol 235-240 ◽  
pp. 2183-2184
Author(s):  
V.I. Belinicher ◽  
A.L. Chernyshev ◽  
L.V. Popovich
Keyword(s):  
Low Energy ◽  
Copper Oxides ◽  
Energy Reduction ◽  
Band Model

Two band model for superconducting copper oxides

1988 ◽  
Vol 126 (4) ◽  
pp. 287-290 ◽  
Author(s):  
P. Prelovšek
Keyword(s):  
Copper Oxides ◽  
Band Model ◽  
Two Band Model

scholarly journals Hybrid Non-Volatile Flip-Flops Using Spin-Orbit-Torque (SOT) Magnetic Tunnel Junction Devices for High Integration and Low Energy Power-Gating Applications

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1406
Author(s):  
Jaeyoung Park
Keyword(s):  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Low Energy ◽  
The Other ◽  
Energy Reduction ◽  
Power Gating ◽  
Spin Orbit ◽  
Flip Flop ◽  
Area Overhead ◽  
Nmos Transistors

This paper presents two novel hybrid non-volatile flip-flops (NVFFs) comprised of the conventional CMOS flip-flop for static storage in normal operations and Spin-Orbit-Torque Magnetic Tunnel Junction (SOT-MTJ) devices for temporary storage during power gating. The proposed NVFFs re-utilize a part of the standard CMOS flip-flop infrastructure for storing and restoring data onto MTJs for reducing the area. Furthermore, the proposed NVFFs re-use a write current, which is used for storing an MTJ, to write the other MTJ at a time, resulting in 50% storing energy reduction. To reduce the area further, the number of external terminals of an MTJ is reduced by shorting the shorting physical terminals. Removing a terminal using the proposed STT-Like SOT configuration results in fewer transistors to control. The proposed NVFF circuits are evaluated using a compact MTJ model targeting implementation in a 14-nm technology node. Analysis indicates that area overheads are only 10.3% and 6.9% compared to the conventional D flip-flop because three or two minimum-sized NMOS transistors are added for accessing MTJs. Compared to the best previously known NVFFs, the proposed NVFF has an improvement by a factor of 2–8 in terms of the area overhead.

Criterion for the validity of thet-Jmodel based upon a two-band model for copper oxides

1990 ◽  
Vol 41 (4) ◽  
pp. 1969-1972 ◽  
Author(s):  
J. L. Shen ◽  
C. S. Ting
Keyword(s):  
Copper Oxides ◽  
Band Model ◽  
Two Band Model

scholarly journals Low energy production impact on lean flow

2015 ◽  
Vol 26 (3) ◽  
pp. 412-428 ◽  
Author(s):  
Peter Ball
Keyword(s):  
Energy Efficiency ◽  
Energy Use ◽  
Low Energy ◽  
Energy Reduction ◽  
Manufacturing Companies ◽  
Production Flow ◽  
Content Type ◽  
Product Flow ◽  
The Impact ◽  
Production Facilities

Purpose – Rising energy costs and potential scarcity are driving energy reduction initiatives in manufacturing companies. The reduction in energy use is complementary to the classic lean production philosophy and the lean and green literature implies that reducing energy waste supports lean objectives. The purpose of this paper is to examine this perceived positive correlation and identify the impact level of energy reduction of lean product flow. Design/methodology/approach – To achieve this, published case studies and practices from interview were gathered and categorised against a waste management hierarchy. Findings – Energy reduction activities implicitly reduce waste which is compatible with the lean waste objective, however, when applying the waste hierarchy principle to energy efficiency practice, lean product flow is progressively constrained or compromised towards the lower levels of the hierarchy. Research limitations/implications – The hierarchical classification seeks to communicate how reported energy efficiency improvements will/will not impact on flow. The research focuses on the modification of existing discrete part production facilities towards greater energy efficiency and neglects alternative production technologies and new build. The results suggest that as manufacturers seeking to be more energy efficient move away from preventative actions to more reduce and reuse actions then production flexibility could become restricted and the design of production facilities make re-think the fast, linear and short flow of product. Practical implications – Examples of industrial practices are provided to show the implications of energy reduction practice on production flow. Originality/value – Categorises the relationship between classic lean and industrial low-energy initiatives to provide insight to how higher energy cost could impact on production.

RESONATING VALENCE BONDS: A NEW STATE FOR MIXED VALENCE SYSYEMS?

1988 ◽  
Vol 02 (05) ◽  
pp. 721-729 ◽  
Author(s):  
D. H. Lee
Keyword(s):  
Heisenberg Model ◽  
Energy Charge ◽  
Mixed Valence ◽  
Valence Bond ◽  
Low Energy ◽  
Copper Oxides ◽  
The Novel ◽  
Charge Transfer Process ◽  
New Form ◽  
Pair Hopping

In this paper, we briefly review the recent efforts to understand the novel resonating valence bond (RVB) state for the S = 1/2 antiferromagnetic (AFM) Heisenberg model. We propose a pair hopping mechanism which generates a new form of AFM superexchange, and argue that the RVB wavefunction is successful because it takes full advantage of this pair hopping. Finally, we will argue that the high T c copper oxides represent a new fixed point of mixed valence systems, in which the low energy charge transfer process is governed by pair hopping between copper and oxygen orbitals.

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