Superconductivity, Charge Orderings, Magnetism, and Their Phase Separations in the Ground State of Lattice Models of Superconductor with Very Short Coherence Length

Kapcia, Konrad Jerzy

doi:10.1007/s10948-014-2906-4

Cited by 16 publications

(22 citation statements)

References 46 publications

(103 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar as in previous case all transitions lines merge at a bicritical point B. Moreover, at T = 0 the PS:SC/CO state is degenerated with the MIX2:SC/CO phase (a coexistence of SC and CO in homogeneous phase, ∆q, n Q = 0), but at any T > 0 that degeneration is removed [8,9,29]. With increasing W > 0, the B-point moves along the SCNO boundary toward larger |μ| (|1 − n|).…”

Section: Superconductivity and Charge Orderingssupporting

confidence: 77%

“…also Refs. [8,9,24]) and they do not change with decreasing W < 0. The rst-order NONO transition line (vertical one for xedμ = 0) ends at critical point C located at kBT /WQ = 0.5.…”

Section: Superconductivity and Charge Orderingsmentioning

confidence: 90%

“…[25], whereas the behaviour of the system at T = 0 have been investigated in Ref. [9]. With increasing |J|, the B-point moves along the SCNO boundary toward larger |μ| (|1 − n|).…”

Section: Superconductivity and Magnetismmentioning

confidence: 99%

“…The region of the CO phase stability is extended, whereas the region of the SC phase occurrence is reduced, by increasing the ratio W/|I|. For W = |I| there homogeneous phases: SC, CO and MIX2 are degenerated at n = 1 [1,8,9], but the SC phase has a lowest energy for n = 1.…”

Section: Superconductivity and Charge Orderingsmentioning

confidence: 99%

See 3 more Smart Citations

Electron Phase Separations Involving Superconductivity in the Extended Hubbard Models with Pair Hopping Interaction

Kapcia

2015

Acta Phys. Pol. A

View full text Add to dashboard Cite

In this work the extended Hubbard models with pair hopping interaction (at the atomic limit) are investigated within the variational approach, which treats the on-site interaction term exactly and the intersite interactions within the mean-eld approximation (exact in d → +∞). We analyze mutual stability of the superconducting phase and charge or (ferro/antiferro-)magnetic orderings as well as homogeneous mixed phases. Our preliminary results for U = 0 show that the superconducting phase can coexist with the charge or (ferro/antiferro-)magnetic phases only in states with electron phase separation.

show abstract

Section: Superconductivity and Charge Orderingssupporting

confidence: 77%

“…also Refs. [8,9,24]) and they do not change with decreasing W < 0. The rst-order NONO transition line (vertical one for xedμ = 0) ends at critical point C located at kBT /WQ = 0.5.…”

Section: Superconductivity and Charge Orderingsmentioning

confidence: 90%

“…[25], whereas the behaviour of the system at T = 0 have been investigated in Ref. [9]. With increasing |J|, the B-point moves along the SCNO boundary toward larger |μ| (|1 − n|).…”

Section: Superconductivity and Magnetismmentioning

confidence: 99%

Section: Superconductivity and Charge Orderingsmentioning

confidence: 99%

See 2 more Smart Citations

Electron Phase Separations Involving Superconductivity in the Extended Hubbard Models with Pair Hopping Interaction

Kapcia

2015

Acta Phys. Pol. A

View full text Add to dashboard Cite

show abstract

“…In this section we present a brief review of the zerotemperature results for the atomic limit (t = 0) of model (1) derived in [22][23][24][25]. For large U, |J| t the effective magnetic interaction in model (1) can be obtained as K eff ≈ −4t 2 /(U − |J|).…”

Section: Results In the Atomic Limitmentioning

confidence: 99%

Ground State Phase Diagram of the Extended Hubbard Model with Pair-Hopping Interaction in the Limit of Very Narrow Bandwidth

Kapcia

Czart

2016

Acta Phys. Pol. A

View full text Add to dashboard Cite

The extended Hubbard model with the pair-hopping interaction, i.e. the Penson-Kolb-Hubbard model, is one of the conceptually simplest phenomenological models for studying correlations and for description of superconductivity in very narrow-band systems with short-range, almost unretarded pairing. We present ground state phase diagrams of the model derived within the broken-symmetry Hartree-Fock approximation in the narrow-bandwidth regime and compare these results with the exact ones in the atomic limit for the limit of high dimensions. The investigation of the diagrams of the model show that results obtained within both approaches are consistent, although for the case of the finite single-electron hopping phases with magnetic long-range order also occur.

show abstract

Superstripes in the Low Energy Physics of Complex Quantum Matter at the Mesoscale

Bianconi

2015

J Supercond Nov Magn

View full text Add to dashboard Cite

A new low energy (in the range between 5 and 250 meV) physics focusing in the mesoscale (extending in the range between 1 nm and 100 μm) world is emerging. The intricate mesoscale world driven by quantum critical charge, orbital, and lattice fluctuations is now becoming the main topic of the Superstripes conference series.This field started in 1992 driven by the interest to understand the nanoscale phase separation of both "electronic matter" and "lattice matter" in cuprate perovskites [1], followed in 1996 by the series of Stripes conferences [2] and in 2008 by the present series of Superstripes conferences [3]. While the majority of the scientific community working in high temperature physics was accepting for 25 years the dogma of a uniform CuO 2 plane and a single electronic component, the small scientific community of the Stripes conferences proposed that an intrinsic nontrivial inhomogeneity, with different electronic components and anomalous local lattice fluctuations, was a key feature for the emergence of high temperature superconductivity [3][4][5][6]. The complex scenario object of discussions was characterized by a nanoscale phase separation with the competition of different phases in nanoscale domains: (i) short-range spin density wave SDW puddles,; ii) short-range incommensurate charge density wave CDW puddles, and (iii)A. Bianconi ( ) Rome International Center for Materials Science Superstripes, RICMASS, Via dei Sabelli 119/A, 00185, Rome, Italy e-mail: antonio.bianconi@ricmass.eu superconducting domains. This new scenario, called "superstripes" [7,8] is similar to emulsions in soft matter, where multiple phases at small length scales coexist. The superstripes scenario is today well supported by new experimental methods. The nanoscale phase separation takes place in the mesoscopic world intermediate between the atomic scale (for d less than 1 nm) and the macroscopic world (for d larger than 100 μm). All experiments show that the essential interactions are in the low energy range which is the same range as that of many body interactions determining the emergence of life in the cell.In materials science, the new low energy physics is determining advances in new nanotechnologies controlling the structure and textures in the mesoscopic scale.Several research groups have reported at Superstripes 2014 advances on charge density wave physics [9][10][11]. A new type of light, synchrotron radiation (SR), to investigate the mesoscale matter organization, became available worldwide only in this last 20 years. The invention of the synchrotron radiation source, the storage ring, was made in the 1960s, in Frascati by Bruno Touschek, and the first large synchrotron radiation facilities were developed at Stanford and Frascati in the 1970s. But it was only in these last 20 years that synchrotron radiation was available worldwide and it has allowed to image and control magnetic, lattice, and charge complexity in the mesoscale. The new methodologies probe multiscale spatial and temporal complexity in the low energy ...

show abstract

Superconductivity, Charge Orderings, Magnetism, and Their Phase Separations in the Ground State of Lattice Models of Superconductor with Very Short Coherence Length

Cited by 16 publications

References 46 publications

Electron Phase Separations Involving Superconductivity in the Extended Hubbard Models with Pair Hopping Interaction

Electron Phase Separations Involving Superconductivity in the Extended Hubbard Models with Pair Hopping Interaction

Ground State Phase Diagram of the Extended Hubbard Model with Pair-Hopping Interaction in the Limit of Very Narrow Bandwidth

Superstripes in the Low Energy Physics of Complex Quantum Matter at the Mesoscale

Contact Info

Product

Resources

About