2026-10-07T20:39:02Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33791845 2026-09-15T12:29:35Z category_30166 category_30181 category_30175 category_30169 item_type_3 month_year_09_2026

Spin-Triplet Half Excitonic Insulators in Monolayer CoCl₂ Shan Dong (24932918) Wen-kai Lou (21778955) Kai Chang (21779099) Condensed matter modelling and density functional theory Condensed matter physics not elsewhere classified Structural properties of condensed matter Electronic and magnetic properties of condensed matter; superconductivity excitonic insulators spin-triplet excitons monolayer 2d materials <p dir="ltr">We report the theoretical discovery of a spin‑triplet half excitonic insulator in monolayer CoCl₂—a new quantum state that integrates spin‑triplet and half excitonic properties within a single phase. Here, we predict: 1) A half-EI exclusively in the spin‑down channel, with a negative exciton excitation energy—a direct signature of spontaneous condensation; 2) A genuine spin-triplet half EI emerging when inter‑spin‑channel transitions are included, with a critical temperature above room temperature, retaining half-excitonic character and being directly detectable via transport measurements; 3) Robustness confirmed by dynamical BSE calculations.</p> 2026-09-15T12:29:35Z Dataset Dataset 10.6084/m9.figshare.33791845.v1 https://figshare.com/articles/dataset/Spin-Triplet_Half_Excitonic_Insulators_in_Monolayer_CoCl_sub_2_sub_/33791845 CC BY 4.0