Reentrant Charge Ordering Caused by Polaron Formation

  title={Reentrant Charge Ordering Caused by Polaron Formation},
  author={Qingshan Yuan and Peter Thalmeier},
  journal={Physical Review Letters},
Based on a two-dimensional extended Hubbard model with electron-phonon interaction, we have studied the effect of polaron formation on the charge ordering (CO) transition. It is found that for fully ferromagnetically ordered spins the CO state may go through a process of appearance, collapse, and reappearance with decreasing temperature. This is entirely due to a temperature-dependent polaron bandwidth. On the other hand, when a paramagnetic spin state is considered, only a simple reentrant… 
11 Citations
Formation and temperature evolution of correlated polarons in colossal magnetoresistive manganites.
  • L. Hao, L. Sheng
  • Physics, Medicine
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2009
The peak structure in the quasiadiabatic regime provides an explanation for the temperature dependence of the polaron correlation in nanoscale charge ordered polaron clusters observed in the manganites with intermediate to narrow bandwidths.
Theory of the reentrant charge-order transition in the manganites
A theoretical model for the reentrant charge-order transition in the manganites is examined. This transition is studied with a purely electronic model for the eg Mn electrons: the extended Hubbard
Re-entrant charge-ordering behaviour in the layered manganites La2-2xSr1+2xMn2O7
We have investigated the charge-ordering (CO) behaviour of the layered manganites La2-2xSr1+2xMn2O7 (0.3≤x≤0.8) by means of transport and magnetization measurements. It is found that the CO
Ferromagnetism and colossal magnetoresistance from phase competition.
It is shown that doping an AFM or CO state always generates a FM component, and that FM, AFM, and CO necessarily coexist in a particle-hole asymmetric system.
Charge and Orbital Ordering of Manganites Observed by Resonant X-Ray Scattering
In the study of magnetoresistive manganites, it has been recognized that the orbital degree of freedom plays an important role in the electric and magnetic properties together with the spin and
Orbital and Charge Ordering in LaSr_2Mn_2O_7 Observed by Resonant X-Ray Scattering : Condensed Matter: Electronic Properties, etc.
Orbital and charge ordering phenomena in bilayered perovskite manganite LaSr 2 Mn 2 O 7 have been studied by resonant X-ray scattering. Superlattice reflections corresponding to these orderings are
We study the charge ordering behavior in a three-dimensional extended Hubbard model using the Coherent potential approximation (CPA). It is shown that the charge ordering transition occurs due to the
Interface-mediated pairing in field effect devices
We consider the pairing induced in a strictly 2D electron gas (2DEG) by a proximate insulating film with polarizable localized excitations. Within a model of interacting 2D electrons and localized
Charge Ordering under a Magnetic Field in the Extended Hubbard Model
We study the charge ordering behavior under magnetic field H in the extended Hubbard model within the coherent potential approximation. At quarter filling, for small H we find that the relative
Charge ordering and structural distortions at low temperature in La2-2xSr1+2xMn2O7 (x=0.475 and 0.5).
In this paper we present x-ray scattering results of charge and orbital ordering in the bilayer manganite La 2 0 2 x Sr 1 + 2 x Mn 2 O 7 with doping levels x=0.5 and x= 0.475. Using high-energy x-ray


Charge ordering via electron-electron interactions in the colossal-magnetoresistive manganites
The coupled magnetic and charge-order transition observed in the manganites of the type R1-xMxMnO3 near half filling (x similar or equal to 1/2) is shown to be the result of the interplay between the
Reentrant charge order transition in the extended Hubbard model.
We study the extended Hubbard model with both on-site and nearest neighbor Coulomb repulsion ($U$ and $V$, respectively) in the Dynamical Mean Field theory. At quarter filling, the model shows a
Theoretical Model for the Semi-Metal Yb4As3
We present a model which can explain semi-quantitatively a number of the unusual properties of Yb4As3. The structural phase transition at Tc 300 K is described by a band Jahn-Teller effect of
Interplay of the CE-Type Charge Ordering and the A-Type Spin Ordering in Half-Doped Bilayer Manganite LaSr 2Mn 2O 7
We demonstrate that the 50% hole-doped bilayer manganite LaSr 2 Mn 2 O 7 exhibits CE-type charge- and spin-ordered states below T N, CO A =210 K and below T N CE ∼145 K, respectively. However, the
Pairing of charge-ordered stripes in (La,Ca)MnO3
The propensity of systems of charge and spin to form, under certain conditions, ‘stripe’ phases has recently attracted much attention, as it has been suggested that dynamically fluctuating stripe
Subsurface bonding of hydrogen in niobium: A molecular-dynamics study
Binding energy of hydrogen in a (100) niobium slab is investigated through molecular-dynamics simulations. We introduce a hydrogen-niobium interaction potential that contains an attractive as well as
Crystallization of electrons confined to a lattice
A necessary condition for electron crystallization is the dominance of the electronic Coulomb repulsion as compared with the kinetic energy. We show that 4f systems are good candidates for electron
New type of Cooper pairing in systems with strong electron-phonon interaction.
  • Hang
  • Physics, Medicine
    Physical review. B, Condensed matter
  • 1988
It is shown that a new phonon coherent state must be introduced to serve as the ground state of the phonon subsystem, so that the ground-state energy of the interacting system can be made a stable minimum and an appropriate condensationenergy of the superconducting ground state may be obtained.
Heavy Fermion Behavior in Extremely Low Carrier Concentration System Yb4As3
We have investigated the series of Yb pnictides with anti-Th 3 P 4 structure. The valence of Yb varies from about 2 of Yb 4 Bi 3 to 2.25 of Yb 4 As 3 with the decreasing weight of the pnictogen. In