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 present a low-energy effective model for the charge degrees of freedom intwo-leg t-J ladders. Starting from SU(2) mean-field theory, we exclude the spindegrees of freedom which have an energy gap. At low temperatures, themean-field solution is the staggered-flux phase. For gapless charge excitationsthe effective theory is the Luther-Emery liquid. Our analysis is applicable atlow doping and in the ``physical'' range of parameters $t/J\sim 3$ where thereis only one massless mode in the charge sector and no massless modes in thespin sector. Within our model we make predictions about correlation exponentsand the superconductivity order parameter, and discuss the comparison with theexisting numerical results.Comment: ReVTeX, 14 pages, 11 figures, uses eps

physical review. b, condensed matter

Bipolaronic charge excitations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>t</mml:mi><mml:mo>−</mml:mo><mml:mi>J</mml:mi></mml:math>two-leg ladders

Bipolaronic charge excitations int−Jtwo-leg ladders