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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

A consistent microscopic theory of pseudogap phenomena and novel Bose-liquidsuperconductivity (superfluidity) is presented, based on the fact that inhigh-$T_c$ cuprates and related systems the energy $\varepsilon_A$ of theeffective attraction between fermions is comparable with their Fermi energy$\varepsilon_F$ and the bosonic Cooper pairs are formed above $T_c$ and then apart of such Cooper pairs condense into a Bose superfluid at $T_c$. High-$T_c$cuprates and other systems with low Fermi energies($\varepsilon_F\sim\varepsilon_A$) are bosonic superconductors/superfluids andexhibit pseudogap phases above $T_c$, $\lambda$-like superconducting transitionat $T_c$ and Bose-liquid superconductivity below $T_c$. The relevant chargecarriers in high-$T_c$ cuprates are polarons which are bound into bosonicCooper pairs above $T_c$. Polaronic and pseudogap effects weaken withincreasing the doping and disappear at a quantum critical point. The modifiedBCS-like theory describes another pseudogap regime but the superfluidtransition in high-$T_c$ cuprates and other systems is neither BCS-liketransition nor usual Bose-Einstein condensation. The criteria for bosonizationof Cooper pairs are formulated. The mean-field theory of the coherent singleparticle and pair condensates of bosonic Cooper pairs describes fairly well thenovel superconducting states and properties of high-$T_c$ cuprates in fullagreement with the experimental findings. The unusualsuperconducting/superfluid states and properties of other exotic systems (e.g.,heavy-fermion and organic compounds, $\rm{Sr_2RuO_4}$, $^3$He, $^4$He andatomic Fermi gases) are explained more clearly by the theory of Bosesuperfluids. Finally, the new criteria and principles of unconventionalsuperconductivity and superfluidity are formulated.

Microscopic theory of pseudogap phenomena and unconventional Bose-liquid superconductivity and superfluidity in high-$T_c$ cuprates and other systems