Bosonization of Cooper pairs and novel Bose-liquid superconductivity and superfluidity in high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll" id="d1e1467" altimg="si443.gif"><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:math> cuprates and other exotic systems

Dzhumanov, S.

doi:10.1016/j.physa.2018.11.006

Cited by 12 publications

(1 citation statement)

References 88 publications

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“…Most importantly, with strong short-range magnetic correlation in the background, the two-body state is not necessarily a spin singlet. Due to their emergent nature, they contain the following key characteristics that distinguish them from other boson-like carriers proposed in the literature, such as bosonized Cooper pairs [45][46][47], resonating valence bond [48][49][50]:…”

Section: Key Characteristics Of the Boson In The Ebl Modelmentioning

confidence: 99%

Mottness induced superfluid phase fluctuation with increased density

Lang

Yang

2022

New J. Phys.

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Recent observation of diminishing superfluid phase stiffness upon increasing carrier density in cuprate high-temperature superconductors is unexpected from the quantum density-phase conjugation of superfluidity. Here, through analytic estimation and verified via variational Monte Carlo calculation of an emergent Bose liquid, we point out that Mottness of the underlying carriers can cause a stronger phase fluctuation of the superfluid with increasing carrier density. This effect turns the expected density-increased phase stiffness into a dome shape, in good agreement with the recent observation. Specifically, the effective mass divergence due to "jamming" of the low-energy bosons reproduces the observed nonlinear relation between phase stiffness and transition temperature. Our results suggest a new paradigm, in which unconventional superconductivity in some strongly correlated materials is described by physics of bosonic superfluidity, as opposed to pairing-strength limited Cooper pairing.

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