scholarly journals Spin-dependent Seebeck effect and spin caloritronics in magnetic graphene

2015 ◽  
Vol 91 (15) ◽  
Author(s):  
Babak Zare Rameshti ◽  
Ali G. Moghaddam
Keyword(s):  
Seebeck Effect ◽  
Spin Caloritronics ◽  
Magnetic Graphene

Hydrogenated carbon nanotube-based spin caloritronics

2017 ◽  
Vol 19 (32) ◽  
pp. 21507-21513 ◽  
Author(s):  
Hong-Li Zeng ◽  
Yan-Dong Guo ◽  
Xiao-Hong Yan ◽  
Jie Zhou
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Electric Field ◽  
Gate Voltage ◽  
Seebeck Effect ◽  
Partial Hydrogenation ◽  
Spin Caloritronics ◽  
Spin Seebeck Effect ◽  
Or Gate

The spin-Seebeck effect (SSE) in linearly hydrogenated carbon nanotubes (CNTs) is realized, where partial hydrogenation makes CNTs acquire magnetism. Moreover, an odd–even effect of the SSE is observed, and the even cases could be used as spin-Seebeck diodes, without the need for an electric field or gate voltage.

scholarly journals How to realize the spin-Seebeck effect with a high spin figure of merit in magnetic boron–nitrogen nanoribbon and nanotube structures?

2018 ◽  
Vol 6 (39) ◽  
pp. 10603-10610 ◽  
Author(s):  
Dan-Dan Wu ◽  
Hua-Hua Fu ◽  
Qing-Bo Liu ◽  
Ruqian Wu
Keyword(s):  
High Spin ◽  
Figure Of Merit ◽  
Seebeck Effect ◽  
The Core ◽  
Spin Caloritronics ◽  
Spin Seebeck Effect ◽  
Boron Nitrogen

The spin-Seebeck effect (SSE) has been regarded as one of the core topics in spin caloritronics.

How to realize a spin-dependent Seebeck diode effect in metallic zigzag γ-graphyne nanoribbons?

Nanoscale ◽  
2017 ◽  
Vol 9 (46) ◽  
pp. 18334-18342 ◽  
Author(s):  
Dan-Dan Wu ◽  
Qing-Bo Liu ◽  
Hua-Hua Fu ◽  
Ruqian Wu
Keyword(s):  
Seebeck Effect ◽  
The Core ◽  
Spin Caloritronics

The spin-dependent Seebeck effect (SDSE) is one of the core topics of spin caloritronics.

scholarly journals Bipolar Magnetic and Thermospin Transport Properties of Graphene Nanoribbons with Zigzag and Klein Edges

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Xingyi Tan ◽  
Gang Xu ◽  
Youchang Jiang ◽  
Dahua Ren
Keyword(s):  
Transport Properties ◽  
Temperature Difference ◽  
Graphene Nanoribbons ◽  
Seebeck Effect ◽  
One Dimensional ◽  
Spin Caloritronics ◽  
Flow Directions

Magnetic nanoribbons based on one-dimensional materials are potential candidates for spin caloritronics devices. Here, we constructed ferromagnetic graphene nanoribbons with zigzag and Klein edges (N-ZKGNRs, N = 4–21) and found that the N-ZKGNRs are in the indirect-gap bipolar magnetic semiconducting state (BMS). Moreover, when a temperature difference is applied through the nanoribbons, spin-dependent currents with opposite flow directions and opposite spin directions are generated, indicating the occurrence of the spin-dependent Seebeck effect (SDSE). In addition, the spin-dependent Seebeck diode effect (SDSD) also appeared in these devices. More importantly, we found that the BMS with a larger bandgap is promising for generating the SDSD, while the BMS with a smaller bandgap is promising for generating the SDSE. These findings show that ZKGNRs are promising candidates for spin caloritronics devices.

Spin Seebeck effect

2017 ◽  
Author(s):  
K. Uchida ◽  
R. Ramos ◽  
E. Saitoh
Keyword(s):  
Magnetic Field ◽  
Spin Current ◽  
Seebeck Effect ◽  
Crucial Importance ◽  
Multilayer Systems ◽  
Thermoelectric Conversion ◽  
Spin Caloritronics ◽  
Spin Seebeck Effect ◽  
Field Response ◽  
Basic Characteristics

Chapter 18 This chapter discusses the spin Seebeck effect (SSE), which stands for the generation of a spin current, a flow of spinangular momentum, as a result of a temperature gradient in magnetic materials. In spintronics and spin caloritronics, the SSE is of crucial importance because it enables simple and versatile generation of a spin current from heat. Since the SSE is driven by thermally excited magnon dynaimcs, the thermal spin current can be generated not only from ferromagnetic conductors but also from insulators. Therefore, the SSE is applicable to “insulator-based thermoelectric conversion” which was impossible if only conventional thermoelectric technologies were used. In this chapter, after introducing basic characteristics and mechanisms of the SSE, important experimental progresses, such as the high-magnetic-field response of the SSE and the enhancement of the SSE in multilayer systems, are reviewed.

A spin-Seebeck diode with a negative differential spin-Seebeck effect in a hydrogen-terminated zigzag silicene nanoribbon heterojunction

2016 ◽  
Vol 18 (18) ◽  
pp. 12742-12747 ◽  
Author(s):  
Hua-Hua Fu ◽  
Lei Gu ◽  
Dan-Dan Wu
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Seebeck Effect ◽  
Low Power Consumption ◽  
Central Topic ◽  
Spin Caloritronics ◽  
Spin Seebeck Effect

The spin-Seebeck effect (SSE), the central topic of spin caloritronics, provides a new direction for future low power consumption technology.

Proposal of a Thermoelectric Microgenerator based on Seebeck Effect to Energy Harvesting in Industrial Processes

2014 ◽  
pp. 56-61
Author(s):  
O.H. Ando Junior ◽  
J.L. Ferro ◽  
C.L. Izidoro ◽  
E. Maestrelli ◽  
A.D. Spacek ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Seebeck Effect ◽  
Industrial Processes

Development of A Novel System Based on Green Magnetic / Graphene Oxide / Chitosan /Allium Sativum / Quercus / Nanocomposite for Targeted Release of Doxorubicin Anti-Cancer Drug

2020 ◽  
Vol 20 (9) ◽  
pp. 1094-1104 ◽  
Author(s):  
Omid Arjmand ◽  
Mehdi Ardjmand ◽  
Ali M. Amani ◽  
Mohmmad H. Eikani
Keyword(s):  
Graphene Oxide ◽  
Allium Sativum ◽  
Cytotoxicity Assay ◽  
Targeted Treatment ◽  
Cancer Drug ◽  
Magnetic Graphene Oxide ◽  
Magnetic Graphene ◽  
Anti Cancer ◽  
Cancerous Cells ◽  
Targeted Release

Background: Doxorubicin, as a strong anti-cancer agent for clinical treatment of various cancer types along with other drugs, is widely utilized. Due to the physiology of the human body and cancerous tissues, the applicability of doxorubicin is still limited and the targeted treatment of the different types of cancers is considered. Also, the side effects of the conventional forms of chemotherapy medicines, damaging and stressing the normal cells are considerable. Objective: This study introduces a novel and effective system for the targeted release of doxorubicin by successfully fabricating the green magnetic graphene oxide, chitosan, allium sativum, and quercus nanocomposite. Methods: The in vitro release of doxorubicin loaded on the nanocomposite was evaluated and investigated at pH 7.4 and 6.5, respectively. The drug diffusivity in the plasma environment was assessed for a more accurate analysis of the drug diffusion process. The nanocomposite loaded drug release mechanism and kinetics, as well as cytotoxicity assay was investigated. Results: The efficiency of the drug encapsulation was significantly enhanced using natural extract ingredients and consequently, the efficacy of the targeted treatment of cancerous tissues was improved. The developed nanocomposite provided a controlled release of doxorubicin in similar acidic conditions of the normal and cancerous cells and affirming that the fabricated system is thoroughly pH-dependent. Conclusion: The cytotoxicity assay confirmed that the fabricated nanocomposite at a high growth rate of cancerous cells has an anticancer property and acts as a toxic agent against tumor cells, suggesting that in conjunction with doxorubicin, it can be highly improved for killing cancerous cells.

scholarly journals Thermoelectric current in a graphene Cooper pair splitter

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Z. B. Tan ◽  
A. Laitinen ◽  
N. S. Kirsanov ◽  
A. Galda ◽  
V. M. Vinokur ◽  
...  
Keyword(s):  
Cooper Pair ◽  
Theoretical Description ◽  
Seebeck Effect ◽  
Normal Metal ◽  
Electric Voltage ◽  
Power Generators ◽  
Metal Structures ◽  
Fundamental Phenomenon ◽  
Non Local ◽  
Cooper Pair Splitting

AbstractGeneration of electric voltage in a conductor by applying a temperature gradient is a fundamental phenomenon called the Seebeck effect. This effect and its inverse is widely exploited in diverse applications ranging from thermoelectric power generators to temperature sensing. Recently, a possibility of thermoelectricity arising from the interplay of the non-local Cooper pair splitting and the elastic co-tunneling in the hybrid normal metal-superconductor-normal metal structures was predicted. Here, we report the observation of the non-local Seebeck effect in a graphene-based Cooper pair splitting device comprising two quantum dots connected to an aluminum superconductor and present a theoretical description of this phenomenon. The observed non-local Seebeck effect offers an efficient tool for producing entangled electrons.

scholarly journals Approximate models for the lattice thermal conductivity of alloy thermoelectrics

2021 ◽  
Author(s):  
Jonathan Skelton
Keyword(s):  
Thermal Conductivity ◽  
Energy Efficiency ◽  
Lattice Thermal Conductivity ◽  
Waste Heat ◽  
Seebeck Effect ◽  
Thermoelectric Generators ◽  
Approximate Models

Thermoelectric generators (TEGs) convert waste heat to electricity and are a leading contender for improving energy efficiency at a range of scales. Ideal TE materials show a large Seebeck effect,...

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