Spiral magnetism and collective excitations in doped Hubbard models

doi:https://doi.org/10.1007/BF00752301

Title: Spiral magnetism and collective excitations in doped Hubbard models

Full Record
Other Related Research

Abstract

We discuss the ground state properties and the collective dynamics of spiral magnetic states in the two dimensional Hubbard model. In particular we present the phase diagram in the presence of a finite next-nearest-neighbor hopping integral t{prime}. In contrast to the plain t Hubbard-model we find a region of stable antiferromagnetism in an extended interval of electron (hole) doping off half filling for a negative (positive) ratio of t{prime}/t. In addition we investigate the coupled charge and spiral spin-excitations off half filling. The resulting collective modes are found to be highly anisotropic and strongly Landau damped.

Authors:

Brenig, W ^[1]

Universitaet zu Koeln (Germany)

Publication Date:: 1995-05-01

Sponsoring Org.:: USDOE

OSTI Identifier:: 107584

Report Number(s):: CONF-9409365-
Journal ID: JLTPAC; ISSN 0022-2291; TRN: 95:021295

Resource Type:: Journal Article

Journal Name:: Journal of Low Temperature Physics

Additional Journal Information:: Journal Volume: 99; Journal Issue: 3-4; Conference: International Euroconference on magnetic correlations, metal-insulator-transitions, and superconductivity in novel materials, Wuerzburg (Germany), 26-30 Sep 1994; Other Information: PBD: May 1995

Country of Publication:: United States

Language:: English

Subject:: 66 PHYSICS; 36 MATERIALS SCIENCE; HUBBARD MODEL; GROUND STATES; MAGNETIC PROPERTIES; COPPER OXIDES; CORRELATIONS; LANDAU DAMPING; TWO-DIMENSIONAL CALCULATIONS; DOPED MATERIALS; HOLES; HIGH-TC SUPERCONDUCTORS

Citation Formats


                    Brenig, W. Spiral magnetism and collective excitations in doped Hubbard models.  United States: N. p., 1995. 
        Web.  doi:10.1007/BF00752301.

Copy to clipboard


                    Brenig, W. Spiral magnetism and collective excitations in doped Hubbard models.  United States.  https://doi.org/10.1007/BF00752301

Copy to clipboard


                    Brenig, W. Mon .  
        "Spiral magnetism and collective excitations in doped Hubbard models".  United States.  https://doi.org/10.1007/BF00752301.

Copy to clipboard


                    
@article{osti_107584,

  title        = {Spiral magnetism and collective excitations in doped Hubbard models},

  author       = {Brenig, W},

  abstractNote = {We discuss the ground state properties and the collective dynamics of spiral magnetic states in the two dimensional Hubbard model. In particular we present the phase diagram in the presence of a finite next-nearest-neighbor hopping integral t{prime}. In contrast to the plain t Hubbard-model we find a region of stable antiferromagnetism in an extended interval of electron (hole) doping off half filling for a negative (positive) ratio of t{prime}/t. In addition we investigate the coupled charge and spiral spin-excitations off half filling. The resulting collective modes are found to be highly anisotropic and strongly Landau damped.},

  doi          = {10.1007/BF00752301},

  url          = {https://www.osti.gov/biblio/107584},
  journal      = {Journal of Low Temperature Physics},
number       = 3-4,

  volume       = 99,

  place        = {United States},

  year         = {1995},

  month        = {5}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1007/BF00752301

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Superconductivity in the doped Hubbard model and its interplay with next-nearest hopping t ′

Journal Article Jiang, Hong-Chen ; Devereaux, Thomas P. - Science

The Hubbard model is widely believed to contain the essential ingredients of high-temperature superconductivity. Yet, proving definitively that the model supports superconductivity is challenging. Here, we report a large-scale density matrix renormalization group study of the lightly doped Hubbard model on four-leg cylinders at hole doping concentration δ = 12.5%. We reveal a delicate interplay between superconductivity and charge density wave and spin density wave orders tunable via next-nearest neighbor hopping t ^$$\prime$$. For finite t ^$$\prime$$, the ground state is consistent with a Luther-Emery liquid with power-law superconducting and charge density wave correlations associated with half-filled charge stripes. Inmore »« less
Cited by 13
https://doi.org/10.1126/science.aal5304
Phase diagram of the half-filled extended Hubbard model in two dimensions

Journal Article Chattopadhyay, B ; Gaitonde, D M - Physical Review, B: Condensed Matter

We consider an extended Hubbard model of interacting fermions on a lattice. The fermion kinetic energy corresponds to a tight-binding Hamiltonian with nearest-neighbor ({minus}t) and next-nearest-neighbor (t{sup {prime}}) hopping matrix elements. In addition to the on-site Hubbard interaction (U) we also consider a nearest-neighbor repulsion (V). We obtain the zero-temperature phase diagram of our model within the Hartree-Fock approximation. We consider ground states having charge- and spin-density-wave ordering as well as states with orbital antiferromagnetism or spin nematic order. The latter two states correspond to particle-hole binding with d{sub x{sup 2}{minus}y{sup 2}} symmetry in the charge and spin channels, respectively.more »« less
https://doi.org/10.1103/PhysRevB.55.15364
Charge dynamics and spin order in doped Hubbard models

Journal Article Kampf, A P ; Brenig, W - Journal of Low Temperature Physics

Hole motion in an antiferromagnetic (AF) environment is accompanied by the emission of spin wave excitations. Spin-wave shakeoffs are responsible for incoherent contributions to the dynamics of propagating holes. Using a spin-density-wave polaron scheme the authors calculate the optical conductivity {sigma}({omega}) and show that the incoherent part of the hole spectrum contributes to the low-frequency part of {sigma}({omega}). Separately, the authors discuss the possible formation of spiral spin patterns upon doping of the half-filled one-band Hubbard model. In particular, the authors consider the influence of band structure effects arising from nearest- and next-nearest-neighbor hopping processes on a square lattice. Differencesmore »« less
https://doi.org/10.1007/BF00754949
Ground state phase diagram of the doped Hubbard model on the four-leg cylinder

Journal Article Jiang, Yi-Fan ; Zaanen, Jan ; Devereaux, Thomas P. ; ... - Physical Review Research

We study the ground state properties of the Hubbard model on a four-leg cylinder with doped hole concentration per site δ ≤ 12.5% using density-matrix renormalization group. By keeping a large number of states for long system sizes, we find that the nature of the ground state is remarkably sensitive to the presence of next-nearest-neighbor hopping t'. Without t' the ground state of the system corresponds to the insulating filled stripe phase with long-range charge-density-wave (CDW) order, and short-range incommensurate spin correlations appears. However, for a small negative t' a phase characterized by coexisting algebraic d-wave superconducting (SC) and algebraicmore »« less
https://doi.org/10.1103/PhysRevResearch.2.033073
Hole motion in the t - J and Hubbard models: Effect of a next-nearest-neighbor hopping

Journal Article Gagliano, E ; Bacci, S ; Dagotto, E - Physical Review, B: Condensed Matter; (USA)

Using exact diagonalization techniques, we study one dynamical hole in the two-dimensional {ital t}-{ital J} and Hubbard models on a square lattice including a next-nearest-neighbor hopping {ital t}{prime}. We present the phase diagram in the parameter space ({ital J}/{ital t},{ital t}{prime}/{ital t}), discussing the ground-state properties of the hole. At {ital J}=0, a crossing of levels exists at some value of {ital t}{prime} separating a ferromagnetic from an antiferromagnetic ground state. For nonzero {ital J}, at least four different regions appear where the system behaves like an antiferromagnet or a (not fully saturated) ferromagnet. We study the quasiparticle behavior ofmore »« less
https://doi.org/10.1103/PhysRevB.42.6222

Similar Records