Holstein polarons, Rashba-like spin splitting and Ising superconductivity in electron-doped MoSe2
arXiv:2406.08025 · doi:10.1021/acsnano.4c07805
Abstract
Interaction between electrons and phonons in solids is a key effect defining physical properties of materials such as electrical and thermal conductivity. In transitional metal dichalcogenides (TMDCs) the electron-phonon coupling results in the creation of polarons, quasiparticles that manifest themselves as discrete features in the electronic spectral function. In this study, we report the formation of polarons at the alkali dosed MoSe2 surface, where Rashba-like spin splitting of the conduction band states is caused by an inversion-symmetry breaking electric field. In addition, we observe the crossover from phonon-like to plasmon-like polaronic spectral features at MoSe2 surface with increasing doping. Our findings support the concept of electron-phonon coupling mediated superconductivity in electron-doped layered TMDC materials, observed using ionic liquid gating technology. Furthermore, the discovered spin-splitting at the Fermi level could offer crucial experimental validation for theoretical models of Ising-type superconductivity in these materials.
References in corpus (25)
- Valley polarization in MoS2 monolayers by optical pumping
- Direct observation of the transition from indirect to direct bandgap in atomically thin epitaxial MoSe2
- First-principles study of the phonon-limited mobility in n-type single-layer MoS2
- Two Dimensional Ising Superconductivity in Gated MoS
- Superconductivity protected by spin-valley locking in ion-gated MoS2
- Universal Mechanism of Band-Gap Engineering in Transition-Metal Dichalcogenides
- Electronic Structure, Surface Doping, and Optical Response in Epitaxial WSe2 Thin Films
- Ising Superconductivity and Majorana Fermions in Transition Metal Dichalcogenides
- Electronic Structure of Epitaxial Single-Layer MoS
- First-principles theory of field-effect doping in transition-metal dichalcogenides: Structural properties, electronic structure, Hall coefficient, and electrical conductivity
- Observation of monolayer valence band spin-orbit effect and induced quantum well states (QWS) in MoX2
- A facility for the analysis of the electronic structures of solids and their surfaces by synchrotron radiation photoelectron spectroscopy
- Holstein polaron in a valley-degenerate two-dimensional semiconductor
- The Green's Function of the Holstein Polaron
- Type-II Ising superconductivity in two-dimensional materials with strong spin-orbit coupling
- Ising superconductivity and magnetism in NbSe
- Enhancement of the upper critical field in disordered transition metal dichalcogenide monolayers
- Polaron formation in the presence of Rashba spin-orbit coupling: implications for spintronics
- Two-dimensional plasmonic polarons in n-doped monolayer MoS2
- Electronic and Optical properties of transition metal dichalcogenides under symmetric and asymmetric field-effect doping
- Dual quantum confinement and anisotropic spin splitting in the multi-valley semimetal PtSe
- Enhanced superconductivity in bilayer PtTe by alkali-metal intercalations
- Metal-Insulator Transition and Emergent Gapped Phase in the Surface-Doped 2D Semiconductor 2H-MoTe
- Long living carriers in a strong electron-phonon interacting two-dimensional doped semiconductor
- Microscopic theory of in-plane critical field in two-dimensional Ising superconducting systems