English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We investigate the phase diagram of the half-filled SU(N) Hubbard-Heisenbergmodel with hopping t, exchange J and Hubbard U, on a square lattice. In thelarge-N limit, and as a function of decreasing values of t/J, the model shows atransition from a d-density wave state to a spin dimerized insulator. A similarbehavior is observed at N=6 whereas at N=2 a spin density wave insulatingground state is stabilized. The N=4 model, has a d-density wave ground state atlarge values of t/J which as a function of decreasing values of t/J becomesunstable to an insulating state with no apparent lattice and spin brokensymmetries. In this state, the staggered spin-spin correlations decay as apower-law,resulting in gapless spin excitations at q = (pi,pi). Furthermore,low lying spin modes with small spectral weight are apparent around the wavevectors q = (0,pi) and q = (pi,0). This gapless spin liquid state is equallyfound in the SU(4) Heisenberg model in the self-adjoint antisymmetricrepresentation. An interpretation of this state in terms of a pi-flux phase isoffered. Our results stem from projective (T=0) quantum Monte-Carlo simulationson lattice sizes ranging up to 24 X 24.Comment: 10 pages, 12 figure

physical review. b, condensed matter and materials physics

Phase diagram of the half-filled two-dimensional<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>SU</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mi>N</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>Hubbard-Heisenberg model: A quantum Monte Carlo study

Phase diagram of the half-filled two-dimensionalSU(N)Hubbard-Heisenberg model: A quantum Monte Carlo study