The possible coexistence of superconductivity and topological electronic states in 1T-RhSeTe

Abstract

Transition metal dichalcogenides (TMDs), exhibit a range of crystal structures and topological quantum states. The 1$T$ phase, in particular, shows promise for superconductivity driven by electron-phonon coupling, strain, pressure, and chemical doping. In this theoretical investigation, we explore 1$T$-RhSeTe as a novel type of TMD superconductor with topological electronic states. The optimal doping structure and atomic arrangement of 1$T$-RhSeTe are constructed. Phonon calculations validate the integrity of the constructed doping structure. The analysis of the electron-phonon coupling (EPC) using the Electron-phonon Wannier (EPW) method has confirmed the existence of a robust electron-phonon interaction in 1$T$-RhSeTe, resulting in total EPC constant $\lambda$ = 2.02, the logarithmic average frequency ${\omega }_{\text{log}}$ = 3.15 meV and $T_c$ = 4.61 K, consistent with experimental measurements and indicative of its classification as a BCS superconductor. The band structure analysis revealed the presence of Dirac-like band crossing points. The topological non-trivial electronic structures of the 1$T$-RhSeTe are confirmed via the evolution of Wannier charge centers (WCCs). Collectively, these distinctive properties underscore 1$T$-RhSeTe as a possible candidate for a topological superconductor, warranting further investigation into its potential implications and applications.

arXiv comment7 pages, 4 figures

References in corpus (25)

• Topological insulators and superconductors
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Non-Abelian Anyons and Topological Quantum Computation
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• WannierTools: An open-source software package for novel topological materials
• Topological superconductors: a review
• EPW: Electron-phonon coupling, transport and superconducting properties using maximally localized Wannier functions
• Majorana Zero Modes and Topological Quantum Computation
• An equivalent expression of Z2 Topological Invariant for band insulators using Non-Abelian Berry's connection
• Observation of the Quantum Spin Hall Effect up to 100 Kelvin in a Monolayer Crystal
• Lorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe${}_2$
• Wannier representation of Z_2 topological insulators
• Entanglement spectrum of topological insulators and superconductors
• Gate-induced Superconductivity in atomically thin MoS2 crystals
• Two-dimensional superconductivity at the interface of a Bi2Te3/FeTe heterostructure
• Magnetic Field Driven Nodal Topological Superconductivity in Monolayer Transition Metal Dichalcogenides
• Possibility of Combining Ferroelectricity and Rashba-like spin splitting in Monolayers of 1T-type Transition-Metal Dichalcogenides MX2
• Topological phase singularities in atomically thin high-refractive-index materials
• Three-Dimensional Electronic Structure of type-II Weyl Semimetal WTe${}_2$
• Manipulation of type-I and type-II Dirac points in PdTe2 superconductor by external pressure
• Intrinsic topological superconductivity with exactly flat surface bands in the quasi-one-dimensional A${}_2$Cr${}_3$As${}_3$ (A=Na, K, Rb, Cs) superconductors
• Phonon-mediated superconductivity in the Sb-square-net compound LaCuSb${}_2$
• Superconducting Properties of Topological Semimetal 1$T$-RhSeTe