Anagram & Information om | Engelska ordet EXCITON

Exempel på hur du använder EXCITON i en mening

• An electron and an electron hole that are attracted to each other by the Coulomb force can form a bound state called an exciton.
• This corresponds to separating an electron from a halide ion; the energy required is about 2 eV more than exciton formation.
• An exciton is formed by the coulombic attraction between the electron and the hole, and it may either be in a singlet state or a triplet state, depending on the spin states of these two bound species.
• In 1930 to 1931, Frenkel showed that neutral excitation of a crystal by light is possible, with an electron remaining bound to a hole created at a lattice site identified as a quasiparticle, the exciton.
• The energized electron (exciton) of P680 is captured by a primary electron acceptor of the photosynthetic electron transport chain and thus exits photosystem II.
• His two key achievements are the experimental observation of the fine structure of Rayleigh scattering line due to Brillouin-Mandelstam light scattering on acoustic waves in condensed matter (1930) and the experimental discovery of the exciton (in semiconductor crystals of cuprous oxide) through evidence of its hydrogen-like optical spectrum.
• The same phenomena have been demonstrated in an organic exciton polariton fluid, representing the first achievement of room-temperature superfluidity of a hybrid fluid of photons and excitons.
• He is Deputy Director of the ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), an Australian research centre developing ultra-low energy electronics based on technologies including topological materials, exciton superfluids, non-equilibrium physics, atomically-thin materials and nanodevice fabrication.
• Thus, a biexciton binding energy exceeding the inhomogeneous exciton line width is predicted for a wide range of nanotubes.
• This same mechanism has also been shown to be responsible for exciton transfer between QD's and within molecular systems and biosystems (though incoherently, as a mechanism for photosynthesis), all of which may be treated in a similar formulation.
• The motional narrowing manifests in a peculiar temperature dependence of spin dephasing: The dephasing becomes slower at higher sample temperature where the exciton velocity becomes larger and the excitons more quickly experience environments with different magnetization.
• Theoretical work suggests that a series of optically distinct chromophores are capable of supporting an excitonic state whose symmetry is such that in the course of the exciton relaxing, a radiation mode of non-zero topological charge is created directly.
• In his 1957 paper, Pekar advanced a theory of electromagnetic waves near exciton resonances currently known as polaritons.
• He has contributed to theories of the integer and fractional quantum Hall effects, spintronics in metals and semiconductors, topological Bloch bands and momentum-space Berry curvature phenomena, correlated electron-hole fluids and exciton and polariton condensates, and two-dimensional materials.
• These are often referred to as exciton solutions and they formally describe Coulombic binding by oppositely charged electrons and holes.
• At first, this consequence of SLEs seems counterintuitive because in few-particle picture an unbound electron–hole pair cannot recombine and release energy corresponding to the exciton resonance because that energy is well below the energy an unbound electron–hole pair possesses.
• These are often referred to as exciton solutions and they formally describe Coulombic binding by oppositely charged electrons and holes.
• "Optical nonlinearities and Rabi flopping of an exciton population in a semiconductor interacting with strong terahertz fields".
• Working principle of the Fullerene based BHJ OPVs device involves four fundamental steps namely (i) photons absorption and exciton creation, (ii) exciton diffusion and splitting at the D-A interface, (iii) charge transportation, and, (iv) charge collection.
• It is an important property of typical molecular crystals with two or more symmetrically-equivalent molecules in the elementary cell, such as benzine and naphthalene, that their exciton absorption spectra consist of doublets (or multiplets) of bands strongly polarized along the crystal axes as was demonstrated by Antonina Prikhot'ko.

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