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Theory of electron-acoustic single phonon scattering has been reconsidered. It is assumed that the non-degenerate semiconductor has a spherical parabolic band structure. In the basis of the reconsideration there is a phenomenon of the…

材料科学 · 物理学 2015-06-15 S. V. Melkonyan , A. L. Harutyunyan , T. A. Zalinyan

Raman measurements on monolayer graphene folded back upon itself as an ordered but skew-stacked bilayer (i.e. with interlayer rotation) presents new mechanism for Raman scattering in sp2 carbons that arises in systems that lack coherent AB…

材料科学 · 物理学 2015-05-19 Awnish K. Gupta , Youjian Tang , Vincent H. Crespi , Peter C. Eklund

We calculate the total electronic Raman scattering spectrum for a system with a charge density wave on an infinite-dimensional hypercubic lattice. The problem is solved exactly for the spinless Falicov-Kimball model with dynamical…

强关联电子 · 物理学 2010-10-19 O. P. Matveev , A. M. Shvaika , J. K. Freericks

The high frequency component in blazars is thought to be due to inverse Compton scattered radiation. Recent observations by Fermi-LAT are used to evaluate the details of the scattering process. A comparison is made between the usually…

高能天体物理现象 · 物理学 2015-05-19 C. -I. Björnsson

We compare resonant electronic Raman scattering and photoluminescence measurements for the characterization of a spin-polarized two-dimensional electron gas embedded in $\text{Cd}_{1-x}\text{Mn}_x\text{Te}$ single quantum wells. From Raman…

We develop a theory for micro-Raman scattering by single and coupled two-donor states in silicon. We find the Raman spectra to have significant dependence on the donor exchange splitting and the relative spatial positions of the two donor…

介观与纳米尺度物理 · 物理学 2009-11-07 Belita Koiller , Xuedong Hu , H. D. Drew , S. Das Sarma

The vast majority of superconductors have more than one Fermi surface, on which the electrons pair below the critical temperature $T_C$, yet their superconducting behavior can be well described by a single-band Bardeen-Cooper-Schrieffer…

The line shape of the double-resonant $2D$ Raman mode in bilayer graphene is often considered to be characteristic for a certain laser excitation energy. Here, in a joint experimental and theoretical study, we analyze the dependence of the…

介观与纳米尺度物理 · 物理学 2018-12-19 Felix Herziger , Christoph Tyborski , Oliver Ochedowski , Marika Schleberger , Janina Maultzsch

The cross-section for the lowest order $2\rightarrow2$ elastic scattering between two charged scalars under external magnetic field mediated via a neutral scalar, has been computed in strong as well as weak magnetic field limits. This has…

高能物理 - 唯象学 · 物理学 2020-07-28 Snigdha Ghosh , Vinod Chandra

We have studied experimentally and theoretically the influence of electron-electron collisions on the propagation of electron beams in a two-dimensional electron gas for excess injection energies ranging from zero up to the Fermi energy. We…

介观与纳米尺度物理 · 物理学 2009-10-31 H. Predel , H. Buhmann , L. W. Molenkamp , R. N. Gurzhi , A. N. Kalinenko , A. I. Kopeliovich , A. V. Yanovsky

We study the electron-magnon scattering in bulk Fe, Co, and Ni within the framework of many-body perturbation theory implemented in the full-potential linearized augmented-plane-wave method. To this end, a $\mathbf{k}$-dependent self-energy…

强关联电子 · 物理学 2019-07-31 Mathias C. T. D. Müller , Stefan Blügel , Christoph Friedrich

The Raman scattering spectra from magnetic excitations in an antiferromagnetic spin-1/2 two leg ladder is investigated for weak and strong interladder coupling. In the first case, a cusp in the Raman intensityis obtained at a frequency…

强关联电子 · 物理学 2007-05-23 E. Orignac , R. Citro

Raman scattering experiments from silver nanocrystals embedded in films of amorphous silica are reported. In addition to the low-frequency peak due to vibrational quadrupolar modes, a broadband is observed in the high-frequency range, with…

凝聚态物理 · 物理学 2007-05-23 H. Portales , E. Duval , L. Saviot , M. Fujii , M. Sumitomo , S. Hayashi

The electronic dispersion of a graphene bilayer is highly dependent on rotational mismatch between layers and can be further manipulated by electrical gating. This allows for an unprecedented control over electronic properties and opens up…

材料科学 · 物理学 2016-08-31 Johannes C. Rode , Dmitri Smirnov , Hennrik Schmidt , Rolf J. Haug

Electromagnetic wave scattering by many parallel to $z-$axis, thin, impedance, circular infinite cylinders is studied asymptotically as $a\to 0$. Let $D_m$ be the crossection of the $m-$th cylinder, $a$ be its radius, and…

数学物理 · 物理学 2012-09-03 A. G. Ramm

Surface enhanced Raman spectra from molecules (bipyridyl ethylene) adsorbed on gold dumbells are observed to become increasingly asymmetric (Fano-like) at higher incident light intensity. The electronic temperature (inferred from the…

介观与纳米尺度物理 · 物理学 2016-01-12 S. Dey , M. Banik , E. Hulkko , K. Rodriguez , V. A. Apkarian , M. Galperin , A. Nitzan

Inelastic scattering of visible light (Raman effect) offers a window into properties of correlated metals such as spin, electron and lattice dynamics as well as their mutual interactions. In this review we focus on electronic and spin…

超导电性 · 物理学 2020-07-20 N Lazarevic , R Hackl

We report on a magneto-Raman scattering study of graphene flakes located on the surface of a bulk graphite substrate. By spatially mapping the Raman scattering response of the surface of bulk graphite with an applied magnetic field, we…

介观与纳米尺度物理 · 物理学 2014-10-31 C. Faugeras , J. Binder , A. A. L. Nicolet , P. Leszczynski , P. Kossacki , A. Wysmolek , M. Orlita , M. Potemski

Electronic Raman scattering measures a polarization-dependent scattering intensity which can provide information about the location of nodes in the energy gap of an unconventional superconductor as well as its overall symmetry. In this…

超导电性 · 物理学 2010-10-06 G. R. Boyd , P. J. Hirschfeld , T. P. Devereaux

This article is a review o over theory of superconductivity, which is constructed for systems with two overlapping energy bands at the Fermi surface and with arbitrary charge carrier density.There is taken into account all possible kinds of…

超导电性 · 物理学 2007-05-23 M. E. Palistrant