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20002025
most citedCritical phenomena in complex networks

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Showing 2007Show all

69 papers · 1 filter

astro-ph2007★ 74 cited

Bounds on the fine structure constant variability from FeII absorption lines in QSO spectra

Paolo Molaro, Dieter Reimers, Irina I. Agafonova +1

The Single Ion Differential alpha Measurement (SIDAM) method for measuring fine stucture variations (daa)and its figures of merit are illustrated together with the results produced…

cond-mat.mes-hall2007★ 81 cited

Electric field effect on electron spin splitting in SiGe/Si quantum wells

M. O. Nestoklon, E. L. Ivchenko, J. -M. Jancu +1

Effect of electric field on spin splitting in SiGe quantum wells (QWs) has been studied theoretically. Microscopical calculations of valley and spin splittings are performed in the…

astro-ph2007★ 77 cited

UVES radial velocity accuracy from asteroid observations. Implications for the fine structure constant variability

P. Molaro, S. A. Levshakov, S. Monai +4

High resolution observations of the asteroids Iris and Juno have been performed by means of the UVES spectrograph at the ESO VLT to obtain the effective accurac y of the spectrogra…

cond-mat.mes-hall2007★ 63 cited

Symmetry and spin dephasing in (110)-grown quantum wells

V. V. Bel'kov, P. Olbrich, S. A. Tarasenko +7

Symmetry and spin dephasing of in (110)-grown GaAs quantum wells (QWs) are investigated applying magnetic field induced photogalvanic effect (MPGE) and time-resolved Kerr rotation.…

cond-mat.mes-hall2007★ 7 cited

Magnetotransport in low-density -Si/SiGe heterostructures: From metal through hopping insulator to Wigner glass

I. L. Drichko, A. M. Dyakonov, I. Yu. Smirnov +6

We study DC and AC transport in low-density Si/SiGe heterostructures at low temperatures and in a broad domain of magnetic fields up to 18 T. Complex AC conductance is determin…

cond-mat.mtrl-sci2007★ 27 cited

Magnetoelastic and thermal effects in the BiMn2O5 lattice: a high-resolution x-ray diffraction study

E. Granado, M. S. Eleoterio, A. F. Garcia-Flores +3

High-resolution synchrotron x-ray diffraction measurements were performed on single crystalline and powder samples of BiMn2O5. A linear temperature dependence of the unit cell volu…

cond-mat.mes-hall2007★ 26 cited

Quantum and classical multiple scattering effects in spin dynamics of cavity polaritons

M. M. Glazov, L. E. Golub

The transport properties of exciton-polaritons are studied with allowance for their polarization. Both classical multiple scattering effects and quantum effects such as weak locali…

cond-mat.other2007★ 13 cited

Quantum dot cascade laser: Arguments in favor

I. A. Dmitriev, R. A. Suris

Quantum cascade lasers are recognized as propitious candidates for future terahertz optoelectronics. Here we demonstrate several definite advantages of quantum dot cascade structur…

cond-mat.dis-nn2007★ 17 cited

Magnetotransport of electrons in quantum Hall systems

I. A. Dmitriev, F. Evers, I. V. Gornyi +3

Recent theoretical results on magnetotransport of electrons in a 2D system in the range of moderately strong transverse magnetic fields are reviewed. The phenomena discussed includ…

cond-mat.mtrl-sci2007★ 37 cited

Resonant light delay in GaN with ballistic and diffusive propagation

T. V. Shubina, M. M. Glazov, A. A. Toropov +8

We report on a strong delay in light propagation through bulk GaN, detected by time-of-flight spectroscopy. The delay increases resonantly as the photon energy approaches the energ…

cond-mat.mes-hall2007★ 29 cited

Resonant Fibonacci Quantum Well Structures

A. N. Poddubny, L. Pilozzi, M. M. Voronov +1

We propose a resonant one-dimensional quasicrystal, namely, a multiple quantum well (MQW) structure satisfying the Fibonacci-chain rule with the golden ratio between the long and s…

cond-mat.str-el2007★ 75 cited

Quasiparticles at the verge of localization near the Mott metal-insulator transition in a two-dimensional material

J. Merino, M. Dumm, N. Drichko +2

The dynamics of charge carriers close to the Mott transition is explored theoretically and experimentally in the quasi two-dimensional organic charge-transfer salt -(BEDT-TTF)$_…

cond-mat.mes-hall2007★ 30 cited

Electron scattering in quantum wells subjected to an in-plane magnetic field

S. A. Tarasenko

It is shown that the electron scattering by static defects, acoustic or optical phonons in quantum wells subjected to an in-plane magnetic field is asymmetric. The probability of s…

quant-ph2007★ 8 cited

Photoionization accompanied by excitation at intermediate photon energies

E. G. Drukarev, E. Z. Liverts, M. Ya. Amusia +2

We calculate the photoionization with excitation-to photoionization ratios for atomic helium and heliumlike ions at intermediate values of the photon energies. The final state inte…

cond-mat.other2007★ 10 cited

Manifestation of spin-orbit interaction in tunneling between 2D electron layers

I. V. Rozhansky, N. S. Averkiev

An influence of spin-orbit interaction on the tunneling between two 2D electron layers is considered. Particular attention is addressed to the relation between the contribution of…

physics.atm-clus2007

On photoionization of the subvalent subshells of noble gas endohedral atoms

M. Ya. Amusia, A. S. Baltenkov, L. V. Chernysheva

We demonstrate strong interference patterns in the photoionization cross-section of the subvalent subshells of noble gas (NG) endohedral atoms NG@F. This interference is a result o…

physics.atm-clus2007★ 5 cited

On the photoionization of the outer electrons in noble gas endohedral atoms

M. Ya. Amusia, A. S. Baltenkov, L. V. Chernysheva

We demonstrate the prominent modification of the outer shell photoionization cross-section in noble gas (NG) endohedral atoms NG@F under the action of the fullerene F electron shel…

cond-mat.dis-nn2007★ 4 cited

The tensor of interaction of a two-level system with an arbitrary strain field

D. V. Anghel, T. Kühn, Y. M. Galperin +1

The interaction between two-level systems (TLS) and strain fields in a solid is contained in the diagonal matrix element of the interaction hamiltonian, , which, in general, has…

astro-ph2007★ 20 cited

Observations of the Prompt Gamma-Ray Emission of GRB 070125

Eric C. Bellm, Kevin Hurley, Valentin Pal'shin +17

The long, bright gamma-ray burst GRB 070125 was localized by the Interplanetary Network. We present light curves of the prompt gamma-ray emission as observed by Konus-WIND, RHESSI,…

quant-ph2007★ 10 cited

Creation of macroscopic quantum superposition states by a measurement

I. E. Mazets, G. Kurizki, M. K. Oberthaler +1

We propose a novel protocol for the creation of macroscopic quantum superposition (MQS) states based on a measurement of a non-monotonous function of a quantum collective variable.…

astro-ph2007★ 36 cited

Theory of cooling neutron stars versus observations

D. G. Yakovlev, O. Y. Gnedin, A. D. Kaminker +1

We review current state of neutron star cooling theory and discuss the prospects to constrain the equation of state, neutrino emission and superfluid properties of neutron star cor…

cond-mat.mtrl-sci2007★ 41 cited

Suppression of electron spin relaxation in Mn-doped GaAs

G. V. Astakhov, R. I. Dzhioev, K. V. Kavokin +7

We report a surprisingly long spin relaxation time of electrons in Mn-doped p-GaAs. The spin relaxation time scales with the optical pumping and increases from 12 ns in the dark to…

cond-mat.mes-hall2007★ 10 cited

Magneto-gyrotropic photogalvanic effects in GaN/AlGaN two-dimensional systems

W. Weber, S. Seidl, S. N. Danilov +8

The magneto-gyrotropic photogalvanic and spin-galvanic effects are observed in (0001)-oriented GaN/AlGaN heterojunctions excited by terahertz radiation. We show that free-carrier a…

cond-mat.other2007★ 19 cited

Nonlinearly driven Landau-Zener transition with telegraph noise

J. I. Vestgarden, J. Bergli, Y. M. Galperin

We study Landau-Zener like dynamics of a qubit influenced by transverse random telegraph noise. The telegraph noise is characterized by its coupling strength, and switching rat…