NDLI: Self-trapping and Binding of Particles from Singular Pockets in Weakly Doped AFM Mott Insulator

Content Provider	Springer Nature Link
Author	Rojo Bravo, A. Brazovskii, S.
Copyright Year	2009
Abstract	We consider effects of binding and self-trapping of particles added or excited over the insulating state of an antiferromagnetic Mott insulator. The state of an electron or a hole (as appears in ARPES), or of their bound pair (as appears in optics) can be modified by interactions with collective degrees of freedom—deformations of the lattice or of the spin environment. The resulting self-localized state lowers the total particle energy, enhances its effective mass and splits off the electronic level below the nominal insulating gap. We show theoretically that the effect is particularly pronounced for states near the antinodal (π, 0) type point of the Brillouin zone of the CuO$_{2}$ because of proximity to the van Hove singularity. We study also the van Hove enhancements for bound states of the electron with neutral and charged impurities and for inter-gap excitons. The results are clearly important for undoped and electron-doped cuprates where the antinodal points correspond to the spectrum bottom for electrons. The effect is indirectly important for lightly hole-doped cuprates concerning the ARPES spectrum transfer between the nodal arcs and the dark antinodal regions.
Starting Page	229
Ending Page	233
Page Count	5
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	22
Issue Number	3
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2009-01-09
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Undoped cuprates Electron doped cuprates Antinodal points Van Hove singularity Bound state Self-trapped state Polaron Exciton AFM insulator Characterization and Evaluation of Materials Magnetism, Magnetic Materials Superconductivity, Superfluidity, Quantum Fluids Condensed Matter
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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