6 papers
Quantum Theory of Exciton Magnetic Moment: Interaction and Topological Effects
Gurjyot Sethi, Jiawei Ruan, Fang Zhang +4
Combining magnetometry with optical spectroscopy has uncovered novel quantum phenomena and is emerging as a powerful probe of quantum materials. However, the theory of the magnetic…
Ferromagnetic Insulator to Metal Transition in Non-Centrosymmetric Graphene Nanoribbons
Aidan P. Delgado, Michael C. Daugherty, Weichen Tang +2
Engineering sublattice imbalance within the unit cell of bottom-up synthesized graphene nanoribbons (GNRs) represents a versatile tool for realizing custom-tailored quantum nanomat…
Engineering phase-frustration induced flat bands in an aza-triangulene covalent Kagome lattice
Yuyi Yan, Fujia Liu, Weichen Tang +4
Pi-conjugated covalent organic frameworks (COFs) provide a versatile platform for the realization of designer quantum nanomaterials. Strong electron-electron correlation within the…
Non-excitonic mechanism for electronic and structural phase transitions in Ta2Ni(Se,S)5
Weichen Tang, Zhenglu Li, Cheng Chen +2
We present a first-principles study based on density functional theory (DFT) on the electronic and structural properties of Ta2NiSe5, a layered transition metal chalcogenide that h…
Strong long-wavelength electron-phonon coupling in TaNi(Se,S)
Zhibo Kang, Burak Gurlek, Weichen Tang +9
The search for intrinsic excitonic insulators (EI) has long been confounded by coexisting electron-phonon coupling in bulk materials. Although the ground state of an EI may be diff…
Jahn-Teller-like Distortion in a One-dimensional Ï-Conjugated Polymer
Ziyi Wang, Boyu Qie, Weichen Tang +8
Structurally distorting low-dimensional Ï-conjugated systems can profoundly influence their electronic properties, but controlling such behavior in extended-width systems remains…