Phase separation and charge density waves: Possible sources of non-Fermi liquid behavior and pairing in high-temperature superconductors

1996 ◽  
Vol 9 (4) ◽  
pp. 413-424 ◽  
Author(s):  
C. Castellani ◽  
C. Di Castro ◽  
M. Grilli
Keyword(s):  
Phase Separation ◽  
High Temperature ◽  
Charge Density ◽  
Fermi Liquid ◽  
High Temperature Superconductors ◽  
Charge Density Waves ◽  
Density Waves ◽  
Liquid Behavior ◽  
Fermi Liquid Behavior

scholarly journals LUTTINGER LIQUID, SINGULAR INTERACTION AND QUANTUM CRITICALITY IN CUPRATE MATERIALS

2012 ◽  
Vol 26 (22) ◽  
pp. 1244003
Author(s):  
C. DI CASTRO ◽  
S. CAPRARA
Keyword(s):  
Fermi Liquid ◽  
High Temperature Superconductors ◽  
Effective Interaction ◽  
Luttinger Liquid ◽  
Metallic Phase ◽  
Quantum Criticality ◽  
Electron Interaction ◽  
Research Activity ◽  
Liquid Behavior ◽  
Fermi Liquid Behavior

With particular reference to the role of the renormalization group (RG) approach and Ward identities (WI's), we start by recalling some old features of the one-dimensional Luttinger liquid as the prototype of non-Fermi-liquid behavior. Its dimensional crossover to the Landau normal Fermi liquid implies that a non-Fermi liquid, as, e.g., the normal phase of the cuprate high temperature superconductors, can be maintained in d>1 only in the presence of a sufficiently singular effective interaction among the charge carriers. This is the case when, nearby an instability, the interaction is mediated by critical fluctuations. We are then led to introduce the specific case of superconductivity in cuprates as an example of avoided quantum criticality. We will disentangle the fluctuations which act as mediators of singular electron–electron interaction, enlightening the possible order competing with superconductivity and a mechanism for the non-Fermi-liquid behavior of the metallic phase. This paper is not meant to be a comprehensive review. Many important contributions will not be considered. We will also avoid using extensive technicalities and making full calculations for which we refer to the original papers and to the many good available reviews. We will here only follow one line of reasoning which guided our research activity in this field.

scholarly journals High-temperature charge density wave correlations in La1.875Ba0.125CuO4 without spin–charge locking

2017 ◽  
Vol 114 (47) ◽  
pp. 12430-12435 ◽  
Author(s):  
H. Miao ◽  
J. Lorenzana ◽  
G. Seibold ◽  
Y. Y. Peng ◽  
A. Amorese ◽  
...  
Keyword(s):  
High Temperature ◽  
Charge Density ◽  
Density Wave ◽  
Charge Density Waves ◽  
Charge Ordering ◽  
Density Waves ◽  
Spin Correlations ◽  
Spin Order ◽  
Charge Correlations ◽  
Ordering Transition

Although all superconducting cuprates display charge-ordering tendencies, their low-temperature properties are distinct, impeding efforts to understand the phenomena within a single conceptual framework. While some systems exhibit stripes of charge and spin, with a locked periodicity, others host charge density waves (CDWs) without any obviously related spin order. Here we use resonant inelastic X-ray scattering to follow the evolution of charge correlations in the canonical stripe-ordered cuprate La1.875Ba0.125CuO4 across its ordering transition. We find that high-temperature charge correlations are unlocked from the wavevector of the spin correlations, signaling analogies to CDW phases in various other cuprates. This indicates that stripe order at low temperatures is stabilized by the coupling of otherwise independent charge and spin density waves, with important implications for the relation between charge and spin correlations in the cuprates.

scholarly journals Translation-Invariant Bipolarons and Charge Density Waves in High-Temperature Superconductors

2021 ◽  
Vol 9 ◽  
Author(s):  
Victor D. Lakhno
Keyword(s):  
Charge Density ◽  
High Temperature Superconductors ◽  
Bose Condensate ◽  
Density Wave ◽  
Charge Density Waves ◽  
Superconducting Transition ◽  
Density Waves ◽  
Translation Invariant ◽  
Pseudogap Phase ◽  
Pair Density

A correlation is established between the theories of superconductivity based on the concept of charge density waves (CDWs) and the translation invariant (TI) bipolaron theory. It is shown that CDWs are originated from TI-bipolaron states in the pseudogap phase due to the Kohn anomaly and form a pair density wave (PDW) for wave vectors corresponding to nesting. Emerging in the pseudogap phase, CDWs coexist with superconductivity at temperatures below those of superconducting transition, while their wave amplitudes decrease as a Bose condensate is formed from TI bipolarons, vanishing at zero temperature.

scholarly journals Emergence of a Metal–Insulator Transition and High-Temperature Charge-Density Waves in VSe2 at the Monolayer Limit

Nano Letters ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 5432-5438 ◽  
Author(s):  
Ganbat Duvjir ◽  
Byoung Ki Choi ◽  
Iksu Jang ◽  
Søren Ulstrup ◽  
Soonmin Kang ◽  
...  
Keyword(s):  
High Temperature ◽  
Charge Density ◽  
Charge Density Waves ◽  
Insulator Transition ◽  
Density Waves ◽  
Metal Insulator Transition ◽  
Metal Insulator

scholarly journals Disorder raises the critical temperature of a cuprate superconductor

2019 ◽  
Vol 116 (22) ◽  
pp. 10691-10697 ◽  
Author(s):  
Maxime Leroux ◽  
Vivek Mishra ◽  
Jacob P. C. Ruff ◽  
Helmut Claus ◽  
Matthew P. Smylie ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Superconductivity ◽  
High Temperature Superconductors ◽  
Charge Density Waves ◽  
Tuning Parameter ◽  
Density Waves ◽  
Pair Density ◽  
The Many ◽  
Tunnel Diode Oscillator ◽  
Dynamic Layer

With the discovery of charge-density waves (CDWs) in most members of the cuprate high-temperature superconductors, the interplay between superconductivity and CDWs has become a key point in the debate on the origin of high-temperature superconductivity. Some experiments in cuprates point toward a CDW state competing with superconductivity, but others raise the possibility of a CDW-superconductivity intertwined order or more elusive pair-density waves (PDWs). Here, we have used proton irradiation to induce disorder in crystals of La1.875Ba0.125CuO4 and observed a striking 50% increase of Tc, accompanied by a suppression of the CDWs. This is in sharp contrast with the behavior expected of a d-wave superconductor, for which both magnetic and nonmagnetic defects should suppress Tc. Our results thus make an unambiguous case for the strong detrimental effect of the CDW on bulk superconductivity in La1.875Ba0.125CuO4. Using tunnel diode oscillator (TDO) measurements, we find indications for potential dynamic layer decoupling in a PDW phase. Our results establish irradiation-induced disorder as a particularly relevant tuning parameter for the many families of superconductors with coexisting density waves, which we demonstrate on superconductors such as the dichalcogenides and Lu5Ir4Si10.

Phase separation, charge-density waves, and magnetism inLa2NiO4+δwith δ=0.105

1993 ◽  
Vol 70 (4) ◽  
pp. 445-448 ◽  
Author(s):  
J. M. Tranquada ◽  
D. J. Buttrey ◽  
D. E. Rice
Keyword(s):  
Phase Separation ◽  
Charge Density ◽  
Charge Density Waves ◽  
Density Waves
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