Strongly correlated excitonic insulator in atomic double layers
2021年10月27日 · Excitonic insulators (EIs) arise from the formation of bound electron–hole pairs (excitons)1,2 in semiconductors and provide a solid-state platform for quantum many-boson physics3–8.
Evidence for a monolayer excitonic insulator | Nature Physics
2021年12月23日 · We provide evidence against alternative scenarios of a band insulator or a localized insulator and support the existence of an excitonic insulator phase in the clean limit.
Exciton-polariton topological insulator - Nature
2018年10月8日 · Our exciton-polariton topological insulator paves the way for topological phenomena that involve light–matter interaction, amplification and the interaction of exciton-polaritons as a...
激子绝缘体 - iphy.ac.cn
Abstract: An excitonic insulator is a new quantum phase proposed by the Nobel Prize winner in physics Nevill Mott in the early 1960s. It is well known that excitons are bound pairs formed by electron-hole Coulomb interaction in insulator and semiconductor systems where, traditionally, the single-particle energy gap is much larger than the ...
Correlated insulator of excitons in WSe2/WS2 moiré superlattices
We develop a pump probe spectroscopy method that we use to observe an exciton incompressible state at exciton filling ν ex = 1 and charge neutrality, indicating a correlated insulator of excitons. With varying charge density, the bosonic correlated insulator continuously transitions into an electron correlated insulator at charge filling ν e ...
Electrical Breakdown of Excitonic Insulators - Physical Review Link …
2024年6月18日 · We propose a new electrical breakdown mechanism for exciton insulators in the BCS limit, which differs fundamentally from the Zener breakdown mechanism observed in traditional band insulators. Our new mechanism results from the instability of the many-body ground state for exciton condensation, caused by the strong competition between the ...
Phys. Rev. 158, 462 (1967) - Excitonic Insulator - Physical Review …
Excitonic Insulator D. Jérome, T. M. Rice, and W. Kohn Phys. Rev. 158, 462 – Published 10 June 1967
Coexistence of insulator-like paramagnon and metallic spin-orbit ...
2024年12月11日 · At higher energies we find the spin-orbit exciton, also strongly broadened, but with an inverted dispersion and doubled periodicity that are controlled by the charge hopping. These results demonstrate that the AF paramagnon persists, somewhat counterintuitively, far into the metallic regime of the insulator-metal transition driven by the degree ...
Excitonic insulators: Experimental observation of a new class of …
2019年7月31日 · Excitonic insulators have been predicted to host many novel properties, including crystallized excitonium, superfluidity and excitonic high-temperature superconductivity, and breakthroughs...
Spin-Triplet Excitonic Insulator: The Case of Semihydrogenated Graphene
2020年4月22日 · While various excitonic insulators have been studied in the literature, due to the perceived too-small spin splitting, spin-triplet excitonic insulator is rare. In two-dimensional systems such as a semihydrogenated graphene (known as graphone), however, it is possible, as revealed by first-principles calculations coupled with Bethe-Salpeter ...