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Showing 1 to 20 of 108 for “"electron gas"”.
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Charge Echo In An Electron Gas
… or Loschmidt echo of a system of spinless electrons described by a simple tight-binding Hamiltonian. For this system it is possible to construct a unitary operator, T, that reverses the time evolution of the electron degrees of freedom. The electron gas is prepared in an initially …
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Hydrodynamic Properties of an Electron Gas
Made available in DSpace on 2014-12-05T21:49:58Z (GMT). No. of bitstreams: 1 0002731.pdf: 3419813 bytes, checksum: 6a65b9261b33e7fb719fb340e4422a95 (MD5) Previous issue date: 1951
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Probing (with) a two dimensional electron gas
Contains fulltext : 18733_probwia_t.pdf (Publisher’s version ) (Open Access)
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Correlation in the One Dimensional Electron Gas
… in our simulations. We find that decreasing the electron density drives the system from a liquid to a state with rather strong 4kF correlations. This crossover takes place around 22 microm-1, near the density where the electron localization occurs in the experiment. The charge and spin velocities …
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Path integral Monte Carlo and the electron gas
… successfully employed to study the low density electron gas, high-pressure hydrogen, and superfluid helium. For systems where the role of Fermi statistics is important, however, traditional path integral Monte Carlo simulations have an exponentially decreasing efficiency with decreased …
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Tunneling spectroscopy of the two-dimensional electron gas
… density of states (DOS) of a two-dimensional electron system (2DES) in a GaAs/AlGaAs heterostructure. Using a technique that we call "Time Domain Capacitance Spectroscopy" (TDCS), we measure the complete current-voltage characteristics for tunneling into the 2DES without making ohmic contacts …
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On the dynamic structure factor for the electron gas
We cast the well-known electron gas model into a path integral version, then studied its dynamic structure factor S(q,q0 ) systematically. Our study shows that qc defined in RPA not only is the threshold for a bare plasmon, but also in general the one for any number of renormalized plasmons. We …
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Single particle spectrum of the two dimensional electron gas
… Typical energy scales are on the order of a millielectron volt (meV), requiring high resolution, while correlated states of interest, such as those found in the integer and fractional quantum Hall effect, are destroyed by excessive electron heating. Approaches based on tunneling have been hampered …
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Spin Polarization of Ground State Electron Gas at Low Densities
The electron gas is of great interest in condensed matter physics. It is a simple yet intriguing model that exhibits rich results that help our understanding of the electronic structure of materials. In this work we use Quantum Monte Carlo simulations to study the spontaneous polarization of …
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Cooling an electron gas using quantum dot based electronic refrigeration
Studies of two-dimensional electron gases (2DEGs) in semiconductors form an active and productive field of condensed matter physics research. As well as having interesting inherent properties, they are used as the foundation for constructing various nano-scale electronic devices, such as quantum …
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Nonlinear transport in two-dimensional electron gas at large filling factors.
… electrical transport in high-mobility 2D electron gas (2DEG) forming in modulation-doped GaAs/AlGaAs quantum wells. Transport nonlinearities induced by a pure dc electric field as well as by coexisting dc and microwave fields were studied at very high Landau level filling factors. It was …
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A quantum Monte Carlo study of the two-dimensional electron gas
… state and excited states of the two-dimensional electron gas. For ground state properties we have used variational and fixed-node diffusion Monte Carlo methods, the latter of which is a nearly exact method for a system of many fermions. With introduction of backflow and three-body correlations, …
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Transport studies of reentrant integer quantum Hall states forming in the two-dimensional electron gas
<p>The two dimensional electron gas subjected to a magnetic field has been a model system in contemporary condensed matter physics which generated many beautiful experiments as well as novel fundamental concepts. These novel concepts are of broad interests and have benefited other fields of …
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Zigzag Phase Transition in Quantum Wires and Localization in the Inhomogeneous One-Dimensional Electron Gas
… physics of the interacting one-dimensional (1D) electron gas: the transition from one-dimensional to higher dimensional behavior, and the role of inhomogeneity. The interplay between interactions, reduced dimensionality, and inhomogeneity drives a rich variety of phenomena in mesoscopic physics. …
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Optical properties of a spherical 2D electron gas in the presence of a uniform magnetic field
… RPA, we calculate the plasmon frequencies of an electron gas on a two-dimensional spherical surface in the presence of a weak magnetic field. We show that the magnetic field results in a coupling between electronic states with different angular momentum numbers. This coupling results in a …
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Ferroelectric System Dynamics and the Properties of Ferroelectric / Two-Dimensional Electron Gas Heterostructures: a Ginzburg–Landau Study
Understanding the electronic response of materials to applied electric fields is an outstanding goal in solid-state theory. One aspect of this goal is to accurately predict the electric polarization of certain materials and how that polarization changes the electronic structure of adjacent solids. …
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Experimental Study of the Diamagnetism of the Electron Gas in Gaseous Plasmas With Electron and Nuclear Spin Resonance Techniques
Made available in DSpace on 2015-05-12T17:12:23Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6101642.PDF: 6221768 bytes, checksum: 927e8fdb086c1da95a5472e701388ea1 (MD5) Previous issue date: 1961
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Experimental investigation of the interaction between the electron gas and the excited atoms in a plasma by means of a xenon laser
The study of the interaction between the electron gas and the atoms in excited states has been undertaken for a gas discharge situated in a high gain optical cavity. Of particular interest is the effect of lasering upon this interacti.on. Spatially resolved electron density and electron temperature …
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