Massive liquid Ar and Xe detectors for direct Dark Matter searches

Овчинников, Б. М.; Ovchinnikov, Yu. N.; Parusov, V. V.

doi:10.1134/s0021364012150076

Cited by 45 publications

(61 citation statements)

References 21 publications

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“…At zero temperature and half filling the optical conductivity has been comprehensively analyzed by both analytic and numerical methods [4][5][6][7]: the system is insulating and there is an optical gap [8] at ω = 2 , i.e., twice the Mott-Hubbard gap, below which the optical conductivity vanishes. Immediately above this gap, σ 1 (ω) exhibits a square-root increase.…”

Section: Dt E Iωt Gs|[j (T)j (0)]|gs (2)mentioning

confidence: 99%

Optical conductivity of the Hubbard chain away from half filling

et al. 2016

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We consider the optical conductivity σ 1 (ω) in the metallic phase of the one-dimensional Hubbard model. Our results focus on the vicinity of half filling and the frequency regime around the optical gap in the Mott insulating phase. By means of a density-matrix renormalization group implementation of the correction-vector approach, σ 1 (ω) is computed for a range of interaction strengths and dopings. We identify an energy scale E opt above which the optical conductivity shows a rapid increase. We then use a mobile impurity model in combination with exact results to determine the behavior of σ 1 (ω) for frequencies just above E opt which is in agreement with our numerical data. As a main result, we find that this onset behavior is not described by a power law.

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Section: Dt E Iωt Gs|[j (T)j (0)]|gs (2)mentioning

confidence: 99%

Optical conductivity of the Hubbard chain away from half filling

et al. 2016

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“…The quantities {δγ 1 /γ 1 , β} have been found in paper [4]. For T = 0, eight branches are found in paper [3] with different values of Q on the plane of parameters (γ 1 , γ 2 ), where…”

Section: Inhomogeneous Pairing Near Critical Transition Surfacementioning

confidence: 95%

“…Equation = 0 creates surface in this space: critical transition surface. The critical transition surface on the subspace spanned by magnetic field, spin-orbit interaction, and temperature was investigated in a low-temperature region in papers [3,4]. The point T = 0 is a singular point for such a system.…”

Section: Introductionmentioning

confidence: 99%

Singular Temperature Dependence of the Equation of State of Superconductors with Spin-Orbit Interaction in Low-Temperature Region – II

Ovchinnikov

2018

J Supercond Nov Magn

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We extend a previous study of the space and temperature dependence of the order parameter in an ultrathin superconducting film in a longitudinal magnetic field to the vicinity of the critical transition surface. In these films, the spin-orbit interaction can be sizeable. The calculations are restricted to the low-temperature regime. Special attention is given to the zero temperature limit where the state with the maximum value of the critical field is investigated for the given strength of the spin-orbit interaction.

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“…It was shown that the non-linear system of identical discrete particles periodically arranged in the space can support spatially localized vibrational modes [1][2][3]. The forerunners of this discovery can be called the works on the localization of vibrational energy in molecules and molecular crystals at high excitation levels [4,5], as well as the localization of energy in a nonlinear chain, considered from a continuum point of view [6]. It turned out that the discreteness and nonlinearity of media are the two main ingredients necessary for the existence of spatially localized modes, called discrete breathers (DB) or intrinsic localized modes (ILM).…”

Section: Introductionmentioning

confidence: 99%

Discrete breathers in crystals: achievements and open problems

Dmitriev

2016

LoM

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It has long been known that periodic discrete systems containing defects, in addition to traveling waves, allow for the existence of vibrational modes localized on defects. It turned out that if a periodic discrete system is nonlinear, it can support exact solutions in the form of spatially localized vibrational modes even in the absence of defects. Since all the nodes of the system are identical, only a special choice of initial conditions can distinguish the group of nodes, on which such localized mode, called discrete breather (DB), will be excited. Frequency of DB must lie outside the spectrum of small-amplitude traveling waves. Do not resonating with traveling waves and do not losing energy to their excitation, theoretically DB can maintain its vibrational energy forever, in the absence of thermal vibrations and other perturbations. Crystals are nonlinear discrete systems and discovery of DB in them was only a matter of time. Experimental studies of DB run into considerable technical difficulties, and the main tool of their study is by far the atomistic computer simulations. Having gained confidence in the existence of DB in crystals, we still poorly understand their role in solid state physics. This review covers issues specific to the physics of real crystals, which were not considered in the classical works on DB. In particular, it discusses the interaction of moving DB with crystal lattice defects, analyzes the influence of the elastic deformation of the lattice on the DB properties, presents recent works on the effect of nonlinear lattice excitations on the electron subsystem of the crystal, etc.

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Massive liquid Ar and Xe detectors for direct Dark Matter searches

Cited by 45 publications

References 21 publications

Optical conductivity of the Hubbard chain away from half filling

Optical conductivity of the Hubbard chain away from half filling

Singular Temperature Dependence of the Equation of State of Superconductors with Spin-Orbit Interaction in Low-Temperature Region – II

Discrete breathers in crystals: achievements and open problems

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