The generation of spin currents is a significant issue in spintronics. A spin current can be induced by a temperature gradient in the spin-dependent Seebeck effect, which has attracted growing interest over recent years. Herein we propose spin caloritronic devices based on magnetic graphether nanoribbons and investigate the spin thermoelectric properties by first-principles calculations. Owing to the symmetrical spin-resolved transmission spectra, our devices exhibit a robust spin-dependent Seebeck effect and could generate a pure spin current. Moreover, they manifest a high spin Seebeck coefficient and a giant spin figure of merit. Our findings demonstrate that graphether-nanoribbon-based devices possess remarkable spin thermoelectric performance, and might be promising candidates for spin caloritronics.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1039/d2nr02175g | DOI Listing |
Phys Chem Chem Phys
December 2024
College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210046, China.
Inspired by the recently reported novel two-dimensional material BCP, we performed one-dimensional shearing along the zigzag direction to obtain four BCP nanoribbons with various edge atom combinations. An asymmetric hydrogen passivation scheme was employed to modulate the electronic properties and successfully open the band gap, especially the 2H-1H passivation with dihydrogenation and monohydrogenation at the top and bottom edges, respectively, achieving bipolar magnetic semiconductors with edge P-atoms contributing to the main magnetism. Furthermore, three crucial spin-polarized transmission spectra yielded a significant spin-dependent Seebeck effect (SDSE), displaying superior thermoelectric conversion capabilities by generating pure spin currents.
View Article and Find Full Text PDFPhys Chem Chem Phys
November 2024
College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China.
Phys Chem Chem Phys
November 2024
Department of Physics, University of Kashan, Kashan, 87317-53153, Iran.
This study explores the spintronic properties of an innovative device incorporating in-plane bent zigzag phosphorene nanoribbons (ZPNRs). The device features ZPNRs with a channel length of 23.4 nm, bent into circular arcs with varying curvatures.
View Article and Find Full Text PDFSci Rep
October 2024
Department of Physics, Kyushu University, Fukuoka, 819-0395, Japan.
In ferromagnetic metal (FM)/non-magnetic metal (NM) bilayer structures, dynamical spin injection is primarily attributed to spin pumping at the interface. However, thermal effects, such as the spin (dependent) Seebeck effect (S(d)SE) caused by FMR heating effect, are also expected to contribute, particularly farther from the interface within the FM layer. In this study, the detailed mechanism of dynamical spin injection in CoFeB/Pt bilayer films has been investigated.
View Article and Find Full Text PDFPhys Chem Chem Phys
October 2024
College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China.
In spin caloritronics, the spin-dependent Seebeck effect provides a method for significantly reducing Joule heating and achieving ultra-high integration density. Here, we investigate the electronic transport and spin thermoelectric properties of zigzag-edge antimonene nanoribbons (ZANRs) with different widths using first-principles calculations. The results show that the ZANRs exhibit an excellent spin-dependent Seebeck effect.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!