The recent discovery of the interfacial superconductivity (SC) of the BiTe/FeTe heterostructure has attracted extensive studies due to its potential as a novel platform for trapping and controlling Majorana fermions. Here we present studies of another topological insulator (TI)/FeTe heterostructure, SbTe/FeTe, which also has an interfacial 2-dimensional SC. The results of transport measurements support that reduction of the excess Fe concentration of the FeTe layer not only increases the fluctuation of its antiferromagnetic (AFM) order but also enhances the quality of the SC of this heterostructure system. On the other hand, the interfacial SC of this heterostructure was found to have a wider-ranging TI-layer thickness dependence than that of the BiTe/FeTe heterostructure, which is believed to be attributed to the much higher bulk conductivity of SbTe that enhances indirect coupling between its top and bottom topological surface states (TSSs). Our results provide evidence of the interplay among the AFM order, itinerant carries from the TSSs, and the induced interfacial SC of the TI/FeTe heterostructure system.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6955375 | PMC |
| http://dx.doi.org/10.1073/pnas.1914534117 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Pseudotunnel Magnetoresistance in Twisted van der Waals FeGeTe Homojunctions.
Adv Mater
January 2025
Faculty of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa, 252-5258, Japan.
Twistronics, a novel engineering approach involving the alignment of van der Waals (vdW) integrated two-dimensional materials at specific angles, has recently attracted significant attention. Novel nontrivial phenomena have been demonstrated in twisted vdW junctions (the so-called magic angle), such as unconventional superconductivity, topological phases, and magnetism. However, there have been only few reports on integrated vdW layers with large twist angles θ, such as twisted interfacial Josephson junctions using high-temperature superconductors.
View Article and Find Full Text PDFNickel-Doping Induced Oxygen Vacancies in MnO Hollow Cube with Enlarged Interlayer Spacing for Stable Sodium Ions Storage.
Small
January 2025
School of Chemistry, South China Normal University, Guangzhou, 510006, P. R. China.
Intrinsic low conductivity, poor structural stability, and narrow interlayer spacing limit the development of MnO in sodium-ion (Na) supercapacitors. This work constructs the hollow cubic Mn-PBA precursor through an ion-exchange process to in situ obtain a hollow cubic H-Ni-MnO composite with Ni doping and oxygen vacancies (O) via a self-oxidation strategy. Experiments and theoretical calculations show that the hollow nanostructure and the expanding interlayer spacing induced by Ni doping are beneficial for exposing more reactive sites, synergistically manipulating the Na transport pathways.
View Article and Find Full Text PDFToward Fast-Charging and Dendritic-Free Li Growth on Natural Graphite Through Intercalation/Conversion on MoS Nanosheets.
Adv Mater
January 2025
Institute for Superconducting & Electronic Materials (ISEM), Faculty of Engineering and Information Sciences, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW, 2500, Australia.
Article Synopsis
- During fast-charging, uneven lithium plating on graphite anodes leads to performance issues and safety risks for lithium-ion batteries due to the formation of a passivation layer known as the solid-electrolyte interphase (SEI).
- A molybdenum disulfide (MoS) coating on natural graphite modifies the SEI properties, resulting in faster charging times and improved long-term cycling performance by enhancing lithium transport and reducing interfacial resistance.
- The MoS-NG anode demonstrates superior fast-charging capabilities, achieving a charging time of 14.7 minutes at 80% state of charge, making it a viable option for electric vehicle applications over 300 cycles without sacrificing energy density.
Substrate-Free Inorganic-Based Films for Thermoelectric Applications.
Adv Mater
December 2024
Department of Physics and Texas Center for Superconductivity at the University of Houston (TcSUH), University of Houston, Houston, TX, 77204, USA.
Article Synopsis
- The rise of integrated electronics and the Internet of Things creates a need for effective thermal management and energy harvesting, positioning thermoelectric technology as a key solution for direct energy conversion between electricity and heat.
- Recent interest is growing in substrate-free inorganic thermoelectric thin films due to their better adhesion on curved surfaces and compact size, which contrasts with traditional rigid forms.
- The review examines various fabrication techniques for these thin films, explores strategies to improve their performance, discusses potential applications in power generation and cooling, and highlights ongoing challenges along with future research directions.
Latent Solvent-Induced Inorganic-Rich Interfacial Chemistry to Achieve Stable Potassium-Ion Batteries in Low-Concentration Electrolyte.
Angew Chem Int Ed Engl
December 2024
State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300401, China.
Low-concentration electrolytes (LCEs) have attracted great attention due to their cost effectiveness and low viscosity, but suffer undesired organic-rich interfacial chemistry and poor oxidative stability. Herein, a unique latent solvent, 1,2-dibutoxyethane (DBE), is proposed to manipulate the anion-reinforced solvation sheath and construct a robust inorganic-rich interface in a 0.5 M electrolyte.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!