Early-stage relaxation of hot electrons by LO phonon emission Herve´ Castella
... 共SBE’s兲, which give the time evolution of the density distributions in both bands, and of the interband polarization.4 The scattering processes, however, are taken into account by instantaneous scattering rates as in Boltzmann equations, thus treating relaxation as totally incoherent and energy cons ...
... 共SBE’s兲, which give the time evolution of the density distributions in both bands, and of the interband polarization.4 The scattering processes, however, are taken into account by instantaneous scattering rates as in Boltzmann equations, thus treating relaxation as totally incoherent and energy cons ...
Electron-scattering cross sections for 1
... formula are taken directly; therefore, the TCS values presented in this work are in absolute scale. The statistical uncertainties (one standard deviation of the weighted mean value) of the TCS values are about 2% below 2 eV, while they do not exceed 1% over the whole remaining range of the electroni ...
... formula are taken directly; therefore, the TCS values presented in this work are in absolute scale. The statistical uncertainties (one standard deviation of the weighted mean value) of the TCS values are about 2% below 2 eV, while they do not exceed 1% over the whole remaining range of the electroni ...
1 Basics of Semiconductor and Spin Physics
... four electrons to form bonds). Replace one of the host atoms by an atom of As, which belongs to column V. Arsenic will give four of its valence electrons to participate in bonding, and give its remaining fifth electron to the conduction band of the crystal. Thus, arsenic is a donor for germanium. Th ...
... four electrons to form bonds). Replace one of the host atoms by an atom of As, which belongs to column V. Arsenic will give four of its valence electrons to participate in bonding, and give its remaining fifth electron to the conduction band of the crystal. Thus, arsenic is a donor for germanium. Th ...
1 Basics of Semiconductor and Spin Physics
... four electrons to form bonds). Replace one of the host atoms by an atom of As, which belongs to column V. Arsenic will give four of its valence electrons to participate in bonding, and give its remaining fifth electron to the conduction band of the crystal. Thus, arsenic is a donor for germanium. Th ...
... four electrons to form bonds). Replace one of the host atoms by an atom of As, which belongs to column V. Arsenic will give four of its valence electrons to participate in bonding, and give its remaining fifth electron to the conduction band of the crystal. Thus, arsenic is a donor for germanium. Th ...
Quantum Correlations in Optical Angle–Orbital Angular Momentum
... of two photons created by the nonlinear optical process of spontaneous parametric down-conversion. The discrete nature of orbital angular momentum and the continuous but periodic nature of angular position give rise to a special sort of entanglement between these two variables. The resulting correla ...
... of two photons created by the nonlinear optical process of spontaneous parametric down-conversion. The discrete nature of orbital angular momentum and the continuous but periodic nature of angular position give rise to a special sort of entanglement between these two variables. The resulting correla ...
Electrochemistry and Electrogenerated
... response from Coulomb blockade phenomena observed for single-charge injection to isolated individual dots in scanning tunneling microscopy (STM) experiments, also called “addition spectra” (17). Unlike the electrical response measured by STM, the electrochemical response is limited by quantum dot di ...
... response from Coulomb blockade phenomena observed for single-charge injection to isolated individual dots in scanning tunneling microscopy (STM) experiments, also called “addition spectra” (17). Unlike the electrical response measured by STM, the electrochemical response is limited by quantum dot di ...
Definitions You SHould Know
... are in the gaseous state. It is the average energy used to break that bond in different molecules. The greater the average bond enthalpy, the stronger the bond. Bond enthalpies are used to find the enthalpy change of a reaction: ...
... are in the gaseous state. It is the average energy used to break that bond in different molecules. The greater the average bond enthalpy, the stronger the bond. Bond enthalpies are used to find the enthalpy change of a reaction: ...
Computational
... All calculations were done within the density functional theory (DFT) formalism of electronic structure theory using the PBE0 exchange correlation functional.15 The geometries of studied systems were optimized with Gaussian 0916 employing def-TZVP basis sets;17 relativistic large core ECP basis sets ...
... All calculations were done within the density functional theory (DFT) formalism of electronic structure theory using the PBE0 exchange correlation functional.15 The geometries of studied systems were optimized with Gaussian 0916 employing def-TZVP basis sets;17 relativistic large core ECP basis sets ...
Two-Fluid Model for Heavy Electron Physics
... a finite temperature TL so that all f-electrons become itinerant below TL and one may obtain a Fermi liquid state at lower temperatures; for f0 < 1, a fraction of the local moments may persist down to very low temperatures and become magnetically ordered; f0 = 1 thus marks a crossover or a phase tra ...
... a finite temperature TL so that all f-electrons become itinerant below TL and one may obtain a Fermi liquid state at lower temperatures; for f0 < 1, a fraction of the local moments may persist down to very low temperatures and become magnetically ordered; f0 = 1 thus marks a crossover or a phase tra ...
Positron annihilation spectra and core
... can, however, tunnel through the repulsive nuclear potential and annihilate on the core electrons. The γrays produced in the annihilation events have a Dopplerbroadened energy spectrum that is characteristic of the electronic states involved, e.g., annihilation on the tightly-bound core electrons re ...
... can, however, tunnel through the repulsive nuclear potential and annihilate on the core electrons. The γrays produced in the annihilation events have a Dopplerbroadened energy spectrum that is characteristic of the electronic states involved, e.g., annihilation on the tightly-bound core electrons re ...
Density Functional Theory for Systems with Electronic Edges
... The last relation is clearly a contradiction, and thus it can be concluded that for systems without degenerate ground states, two different potentials cannot give the same ground state electron density. This means that if we know the ground state electron density, n(r) we could also obtain all other ...
... The last relation is clearly a contradiction, and thus it can be concluded that for systems without degenerate ground states, two different potentials cannot give the same ground state electron density. This means that if we know the ground state electron density, n(r) we could also obtain all other ...
Article - Archive ouverte UNIGE
... problem was finally resolved in a Letter by Roos published in 2003 [37], where accurate spectroscopic constants and bond length, as well as bond energy were obtained. This work was done with a basis set of the atomic natural orbital type (ANO) [45] using the Douglas–Kroll Hamiltonian [46] to account ...
... problem was finally resolved in a Letter by Roos published in 2003 [37], where accurate spectroscopic constants and bond length, as well as bond energy were obtained. This work was done with a basis set of the atomic natural orbital type (ANO) [45] using the Douglas–Kroll Hamiltonian [46] to account ...
Triple to quintuple quantum dots for making multiple qubits
... standard semiconductor fabrication. High-frequency microwave pulses can be used to prepare arbitrary quantum states of the spin qubits, with fidelity in excess of 99%. Our latest experiment on the 31P nucleus has established the record coherence time (35 seconds) for any single qubit in solid state ...
... standard semiconductor fabrication. High-frequency microwave pulses can be used to prepare arbitrary quantum states of the spin qubits, with fidelity in excess of 99%. Our latest experiment on the 31P nucleus has established the record coherence time (35 seconds) for any single qubit in solid state ...
Flatland Electrons in High Magnetic Fields
... exponentially increases with decreasing T , signaling an insulating behavior. The nature of this insulating state is not entirely clear, but it is generally believed that it is a pinned Wigner solid, a “crystal” of electrons with long-range positional order (see Fig. 2). Now look at what happens at ...
... exponentially increases with decreasing T , signaling an insulating behavior. The nature of this insulating state is not entirely clear, but it is generally believed that it is a pinned Wigner solid, a “crystal” of electrons with long-range positional order (see Fig. 2). Now look at what happens at ...
Principles of Chemistry: A Molecular Approach
... Atoms combine in simple, whole-number ratios to form molecules of compounds. In a chemical reaction, atoms of one element cannot change into atoms of another element. They simply rearrange the way they are attached. ...
... Atoms combine in simple, whole-number ratios to form molecules of compounds. In a chemical reaction, atoms of one element cannot change into atoms of another element. They simply rearrange the way they are attached. ...
Atomic orbital
An atomic orbital is a mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom. This function can be used to calculate the probability of finding any electron of an atom in any specific region around the atom's nucleus. The term may also refer to the physical region or space where the electron can be calculated to be present, as defined by the particular mathematical form of the orbital.Each orbital in an atom is characterized by a unique set of values of the three quantum numbers n, ℓ, and m, which respectively correspond to the electron's energy, angular momentum, and an angular momentum vector component (the magnetic quantum number). Any orbital can be occupied by a maximum of two electrons, each with its own spin quantum number. The simple names s orbital, p orbital, d orbital and f orbital refer to orbitals with angular momentum quantum number ℓ = 0, 1, 2 and 3 respectively. These names, together with the value of n, are used to describe the electron configurations of atoms. They are derived from the description by early spectroscopists of certain series of alkali metal spectroscopic lines as sharp, principal, diffuse, and fundamental. Orbitals for ℓ > 3 continue alphabetically, omitting j (g, h, i, k, …).Atomic orbitals are the basic building blocks of the atomic orbital model (alternatively known as the electron cloud or wave mechanics model), a modern framework for visualizing the submicroscopic behavior of electrons in matter. In this model the electron cloud of a multi-electron atom may be seen as being built up (in approximation) in an electron configuration that is a product of simpler hydrogen-like atomic orbitals. The repeating periodicity of the blocks of 2, 6, 10, and 14 elements within sections of the periodic table arises naturally from the total number of electrons that occupy a complete set of s, p, d and f atomic orbitals, respectively.