Superconductivity in two-dimensional materials has gained significant attention in the last few years. In this work, we report phonon-mediated superconductivity investigations in monolayer Tungsten monofluoride (WF) by solving anisotropic Migdal Eliashberg equations as implemented in EPW. By employing first-principles calculations, our examination of phonon dispersion spectra suggests that WF is dynamically stable. Our results show that WF has weak electron-phonon coupling (EPC) strength () of 0.49 with superconducting transition temperature () of 2.6 K. A saddle point is observed at 0.11 eV below the Fermi level () of WF, which corresponds to the Van Hove singularity (VHS). On shifting the Fermi level to the VHS by hole doping (3.7 × 10cm), the EPC strength increases to 0.93, which leads to an increase in theto 11 K. However, the superconducting transition temperature of both pristine and doped WF increases to approximately 7.2 K and 17.2 K, respectively, by applying the Full Bandwidth (FBW) anisotropic Migdal-Eliashberg equations. Our results provide a platform for the experimental realization of superconductivity in WF and enhancement of the superconducting transition temperature by adjusting the position ofto the VHS.

Download full-text PDF

Source
http://dx.doi.org/10.1088/1361-648X/ad2d47DOI Listing

Publication Analysis

Top Keywords

superconducting transition
12
transition temperature
12
van hove
8
hove singularity
8
superconductivity two-dimensional
8
tungsten monofluoride
8
epc strength
8
fermi level
8
singularity driven
4
driven enhancement
4

Similar Publications

Computational prediction of novel two-dimensional tungsten nitride superconductors.

J Phys Condens Matter

January 2025

Escuela de Artes Plásticas y Audiovisuales, Benemerita Universidad Autonoma de Puebla, Av. San Claudio y Blvd. 18 Sur, Edificios 1IF1, 2IF1 y 3IF1, Ciudad Universitaria, Colonia San Manuel, Puebla, Puebla, 72570, MEXICO.

Transition metal nitrides are well-known 3D superconductor materials. However, there is a lack of knowledge related to their two-dimensional (2D) counterparts, which have several potential technological applications. In this work, we predict, using an evolutionary algorithm coupled with a first-principles approach, a set of novel 2D superconductive structures based on tungsten nitride.

View Article and Find Full Text PDF

Thickness-dependent polaron crossover in tellurene.

Sci Adv

January 2025

Department of Electrical and Computer Engineering and the Rice Advanced Materials Institute, Rice University, Houston, TX 77005, USA.

Polarons, quasiparticles from electron-phonon coupling, are crucial for material properties including high-temperature superconductivity and colossal magnetoresistance. However, scarce studies have investigated polaron formation in low-dimensional materials with phonon polarity and electronic structure transitions. In this work, we studied polarons of tellurene, composed of chiral Te chains.

View Article and Find Full Text PDF
Article Synopsis
  • Discovering the optoelectronic properties of transition metal dichalcogenides (TMDCs) is crucial for next-gen electronic devices, with a focus on the impact of external strains on Dirac states, an area still being explored.
  • A comprehensive database of 90 TMDC types was created, revealing that 27.3% exhibit Dirac materials with three distinct types of Dirac cones, influenced by external strain-induced electron localization.
  • The study shows that TMDCs from tellurides with 1H phase enhance the formation of Dirac cones under stress, leading to metallic properties and increased charge transport, ultimately offering insights for the development of TMDCs in superconducting and optoelectronic applications.
View Article and Find Full Text PDF

Flexible Control of Chiral Superconductivity in Optically Driven Nodal Point Superconductors with Antiferromagnetism.

Phys Rev Lett

December 2024

Institute for Structure and Function and Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics, Chongqing University, Chongqing 400044, People's Republic of China and Center of Quantum Materials and Devices, Chongqing University, Chongqing 400044, People's Republic of China.

Article Synopsis
  • Recent studies focus on creating hybrid systems of magnets and superconductors that exhibit topological superconductivity.
  • The research demonstrates that using Floquet engineering with antiferromagnetic layers and s-wave superconductors can induce chiral topological superconductivity through light interaction that disrupts time-reversal symmetry.
  • The ability to control these topological phases with elliptically polarized light offers a novel way to manipulate superconducting properties through related changes in valley pairs, making this approach promising for experimental exploration.
View Article and Find Full Text PDF

Recently, the emergence of two-dimensional (2D) multiferroic materials has opened a new perspective for exploring topological states. However, instances of tuning topological phase transitions through ferroelectric (FE) polarization in 2D ferromagnetic (FM) materials are relatively rare. Here, we found that 11 single layer (SL) materials, named the MMGeX family, possess both FE and FM properties.

View Article and Find Full Text PDF

Want 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!