Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Shvaika, A. M."'
Autor:
Dobushovskyi, D. A., Shvaika, A. M.
Publikováno v:
Condens. Matter Phys., 2020, vol. 23, No. 1, 13703
An influence of the localization of itinerant electrons induced by correlated hopping on the electronic charge and heat transport is discussed for the lightly doped Mott insulator phase of the Falicov-Kimball model. The case of strongly reduced hoppi
Externí odkaz:
http://arxiv.org/abs/2003.02076
Autor:
Chen, Yuan, Wang, Yao, Jia, Chunjing, Moritz, Brian, Shvaika, Andrij M., Freericks, James K., Devereaux, Thomas P.
Publikováno v:
Phys. Rev. B 99, 104306 (2019)
Time-resolved measurements of materials provide a wealth of information on quasiparticle dynamics, and have been the focus of optical studies for decades. In this paper, we develop a theory for explicitly evaluating time-resolved resonant inelastic X
Externí odkaz:
http://arxiv.org/abs/1901.11255
Publikováno v:
Phys. Rev. B 99, 125137 (2019)
We calculate the finite temperature X-ray photoemission spectroscopy for the Falicov-Kimball model using a Weiner-Hopf sum equation approach. In the metallic state, the core-hole spectral function shows two side peaks corresponding to the creation of
Externí odkaz:
http://arxiv.org/abs/1808.10694
Publikováno v:
Phys. Rev. Lett. 122, 247402 (2019)
One of the goals of pump/probe spectroscopies is to determine how electrons relax after they have been driven out of equilibrium. It is challenging to determine how close electrons are to a thermal state solely by fitting their distribution to a Ferm
Externí odkaz:
http://arxiv.org/abs/1808.07944
Publikováno v:
Condens. Matter Phys., 2018, vol. 21, No. 3, 33707
The effect of the pulse-shape on pump-probe spectroscopies is examined for the simplest model of noninteracting fermions on an infinite-dimensional hypercubic lattice. The probe-modified density of states follows the time evolution of the pump and di
Externí odkaz:
http://arxiv.org/abs/1808.04983
Autor:
Dobushovskyi, D. A., Shvaika, A. M.
Publikováno v:
Condens. Matter Phys., 2018, vol. 21, No. 2, 23702
Optical conductivity spectra are studied for the Falicov-Kimball model with correlated hopping on the Bethe lattice. An expression for the current-current correlation function is derived using dynamical mean field theory. In the metallic phase with s
Externí odkaz:
http://arxiv.org/abs/1806.10010
In this review, we develop the formalism employed to describe charge-density-wave insulators in pump/probe experiments using ultra short driving pulses of light. The theory emphasizes exact results in the simplest model for a charge-density wave insu
Externí odkaz:
http://arxiv.org/abs/1610.02613
Publikováno v:
Phys. Rev. B 95, 125133 (2017)
The effect of correlated hopping on the charge and heat transport of strongly correlated particles is studied for the Falicov-Kimball model on the Bethe lattice. Exact solutions for the one particle density of states (DOS) and two particle transport
Externí odkaz:
http://arxiv.org/abs/1609.07098
Publikováno v:
Phys. Rev. B 94, 115167 (2016)
We determine the exact time-resolved photoemission spectroscopy for a nesting driven charge-density-wave (described by the spinless Falicov-Kimball model within dynamical mean-field theory). The pump-probe experiment involves two light pulses: the fi
Externí odkaz:
http://arxiv.org/abs/1607.04363
Autor:
Devereaux, T. P., Shvaika, A. M., Wu, K., Wohlfeld, K., Jia, C. J., Wang, Y., Moritz, B., Chaix, L., Lee, W. -S., Shen, Z. -X., Ghiringhelli, G., Braicovich, L.
Publikováno v:
Phys. Rev. X 6, 041019 (2016)
The coupling between lattice and charge degrees of freedom in condensed matter materials is ubiquitous and can often result in interesting properties and ordered phases, including conventional superconductivity, charge density wave order, and metal-i
Externí odkaz:
http://arxiv.org/abs/1605.03129