Superstripes and Percolating Nanoscale-Striped Puddles in Heterostructures at Atomic Limit

Bianconi, A.

doi:10.1007/s10948-014-2516-1

Cited by 4 publications

(2 citation statements)

References 49 publications

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“…Possible competition between these two mechanisms (superexchange bonds and spin-orbit) or enhancement of entanglement by their joint action is a challenging problem. It adds another aspect to the complexity of quantum matter in high-T c superconductors [40][41][42][43][44], intimately connected with quantum magnetism in strongly correlated transition metal oxides [45]. Here, we analyze the spin-orbital entanglement evolution on a minimal available model, consisting of SU(2)⊗SU(2) symmetric superexchange term [46] and Ising on-site spin-orbit coupling in one dimension.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling

et al. 2020

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Several realistic spin-orbital models for transition metal oxides go beyond the classical expectations and could be understood only by employing the quantum entanglement. Experiments on these materials confirm that spin-orbital entanglement has measurable consequences. Here, we capture the essential features of spin-orbital entanglement in complex quantum matter utilizing 1D spin-orbital model which accommodates SU(2)⊗SU(2) symmetric Kugel-Khomskii superexchange as well as the Ising on-site spin-orbit coupling. Building on the results obtained for full and effective models in the regime of strong spin-orbit coupling, we address the question whether the entanglement found on superexchange bonds always increases when the Ising spin-orbit coupling is added. We show that (i) quantum entanglement is amplified by strong spin-orbit coupling and, surprisingly, (ii) almost classical disentangled states are possible. We complete the latter case by analyzing how the entanglement existing for intermediate values of spin-orbit coupling can disappear for higher values of this coupling.

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Section: Introductionmentioning

confidence: 99%

Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling

et al. 2020

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“…The name of the series of stripes conferences changed its name into superstripes conferences in 2008 driven by clear evidence for phase separation in iron based superconductors [22,23]. This decision marked the shift of the scientific interest toward quantum phenomena in complex matter [24][25][26][27][28]. and toward a new paradigm: the multigap superconductivity near electronic topological Lifshitz transitions [29] with pairing in one of the Fermi surface pockets is in the BEC-BCS crossover regime [30] .…”

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confidence: 99%

Lifshitz Transitions In Multi-band Hubbard Models for Topological Superconductivity in Complex Quantum Matter

Bianconi¹

2018

J Supercond Nov Magn

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How the macroscopic quantum coherence can resist to the decoherence attacks of high temperature is a major challenge for the science of the 21st century. Superstripes 2017 conference held in Ischia on June 2017 has been focused on the new physics of high Tc superconductors made of complex quantum matter. Today the standard model of high Tc superconductivity which grabs the physics of complex quantum matter is the multi-band Hubbard model where the dome of Tc occurs by driving the chemical potential in the proximity of a topological Lifshitz transition. The multi-gap superconductivity in the Tc dome is driven by exchange interaction between a first condensate in the BEC-BCS crossover which coexists with second BCS condensates. The proximity to Lifshitz transitions in correlated electronic systems gives the ubiquitous arrested phase separation observed in all high temperature superconductors. Non Euclidean filamentary hyperbolic geometry is needed for the space description of superstripes textures produced by the coexistence of short range CDW puddles, hole poor SDW puddles and self organized dopants rich puddles. A road map to room temperature superconductors in particular organic compounds made of superlattices of quantum wires driven by Fano resonances with one of the condensates in the BEC-BCS crossover has been proposed.

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Two Mixed Superconducting Phases in (Hg, Re)-1223 Ceramics

Eleuterio

Amorim

Belich

et al. 2014

J Supercond Nov Magn

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Superstripes and Percolating Nanoscale-Striped Puddles in Heterostructures at Atomic Limit

Cited by 4 publications

References 49 publications

Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling

Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling

Lifshitz Transitions In Multi-band Hubbard Models for Topological Superconductivity in Complex Quantum Matter

Two Mixed Superconducting Phases in (Hg, Re)-1223 Ceramics

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