scholarly journals Proposed Chiral Texture of the Magnetic Moments of Unit-Cell Loop Currents in the Pseudogap Phase of Cuprate Superconductors

2013 ◽  
Vol 111 (4) ◽  
Author(s):  
Sergey S. Pershoguba ◽  
Kostyantyn Kechedzhi ◽  
Victor M. Yakovenko
Keyword(s):  
Cuprate Superconductors ◽  
Magnetic Moments ◽  
Unit Cell ◽  
Pseudogap Phase ◽  
Loop Currents

scholarly journals Hidden Magnetic Texture in the Pseudogap Phase of High-Tc $YBa{2}Cu{3}O_{6.6}$

2021 ◽  
Author(s):  
Philippe Bourges ◽  
Dalila Bounoua ◽  
Yvan Sidis ◽  
Toshinao Loew ◽  
Bourdarot Bourdarot ◽  
...  
Keyword(s):  
Magnetic Moments ◽  
Density Wave ◽  
Unit Cell ◽  
Magnetic Texture ◽  
High Tc ◽  
Superconducting Cuprates ◽  
Unit Cells ◽  
Loop Currents ◽  
Breaking Time ◽  
Symmetry Breakings

Abstract Despite decades of intense researches, the enigmatic pseudo-gap (PG) phase of superconducting cuprates remains an unsolved mystery. In the last 15 years, various symmetry breakings in the PG state have been discovered, spanning an intra-unit cell (IUC) magnetism, preserving the lattice translational (LT) symmetry but breaking time-reversal symmetry and parity, and an additional incipient charge density wave breaking the LT symmetry upon cooling. However, none of these states can (alone) account for the partial gapping of the Fermi surface. Here we report a hidden LT-breaking magnetism which is crucial for elucidating the PG puzzle. Our polarized neutron diffraction measurements reveal magnetic correlations, in two different underdoped YBa2Cu3O6.6 single crystals, that settle at the PG onset temperature with i) a planar propagation wave vector (π, 0) ≡ (0, π), yielding a doubling or quadrupling of the magnetic unit cell and ii) magnetic moments mainly pointing perpendicular to the CuO2 layers. The LT-breaking magnetism is at short range suggesting the formation of clusters of 5-6 unit cells that, together with the previously reported IUC magnetism, yields a hidden magnetic texture of the CuO2 unit cells hosting loop currents.

Doping and energy dependences of thermal conductivity in cuprate superconductors

2017 ◽  
Vol 31 (27) ◽  
pp. 1750344 ◽  
Author(s):  
Chunsheng Ma ◽  
Rui Qi ◽  
Feng Yuan ◽  
Shaou Chen ◽  
Huaisong Zhao
Keyword(s):  
Thermal Conductivity ◽  
Doping Concentration ◽  
Cuprate Superconductors ◽  
The Other ◽  
Characteristic Peak ◽  
Characteristic Energy ◽  
Doping Dependence ◽  
Pseudogap Phase ◽  
In Doping ◽  
The One

By considering the pseudogap effect, the doping and energy dependences of thermal conductivity in cuprate superconductors are studied. Our results show that the thermal conductivity as a function of energy exhibits a characteristic peak from underdoping to overdoping due to the presence of the pseudogap in pseudogap phase of cuprate superconductors. The thermal conductivity is strongly doping dependent. On the one hand, with increasing doping concentration, the weight of thermal conductivity increases quickly, especially the residual thermal conductivity which is in qualitative agreement with the experimental data. On the other hand, the characteristic energy corresponding to the position of the characteristic peak decreases monotonically upon increasing doping concentration, and it scales with the doping dependence of pseudogap. In particular, we have studied the doping dependence of the ratio of quasiparticle velocities normal and tangential to the Fermi surface at the nodes [Formula: see text]. It is shown that [Formula: see text] increases with the increase of doping concentration. Moreover, we explain that both the residual thermal conductivity and [Formula: see text] increase rapidly upon the increase in doping concentration in heavily overdoped cuprate superconductors.

PHOTOEMISSION STUDY OF THE INTRA-UNIT-CELL COUPLING IN A TRILAYER CUPRATE

2002 ◽  
Vol 16 (11n12) ◽  
pp. 1691-1696 ◽  
Author(s):  
D. L. FENG ◽  
H. EISAKI ◽  
K. M. SHEN ◽  
A. DAMASCELLI ◽  
C. KIM ◽  
...  
Keyword(s):  
Electronic Structures ◽  
Cuprate Superconductors ◽  
Single Layer ◽  
Interlayer Coupling ◽  
Unit Cell ◽  
Photoemission Spectroscopy ◽  
Cell Coupling ◽  
Lineshape Analysis ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Photoemission Study

The electronic structures of the nearly optimally doped single-layer, bilayer and trilayer Bi-based cuprates are investigated by angle-resolved photoemission spectroscopy. A lineshape analysis of data taken for different photon energies indicates that the interlayer coupling within the trilayer is not stronger than its counterpart in the bilayer system. This suggests that the higher T c of the trilayer cuprate superconductors is not due to an enhancement of the coupling strength between the neighboring CuO2 planes within each unit cell.

scholarly journals Luttinger-volume violating Fermi liquid in the pseudogap phase of the cuprate superconductors

2012 ◽  
Vol 85 (13) ◽  
Author(s):  
Jia-Wei Mei ◽  
Shinji Kawasaki ◽  
Guo-Qing Zheng ◽  
Zheng-Yu Weng ◽  
Xiao-Gang Wen
Keyword(s):  
Fermi Liquid ◽  
Cuprate Superconductors ◽  
Pseudogap Phase

scholarly journals ORBITAL MAGNETISM IN THE CUPRATES

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3140-3146 ◽  
Author(s):  
SUDIP CHAKRAVARTY ◽  
HAE-YOUNG KEE ◽  
CHETAN NAYAK
Keyword(s):  
Neutron Scattering ◽  
Cuprate Superconductors ◽  
Broken Symmetry ◽  
Theoretical Underpinning ◽  
Pseudogap Phase ◽  
Orbital Magnetism ◽  
D Wave

The pseudogap phase of the cuprate superconductors is argued to be characterized by a hidden broken symmetry of d-wave character in the particle-hole channel that leads to staggered orbital magnetism. This proposal has many striking phenomenological consequences, but the most direct signature of this order should be visible in the neutron scattering experiments. The theoretical underpinning of these experiments is discussed.

scholarly journals Vanishing nematic order beyond the pseudogap phase in overdoped cuprate superconductors

2021 ◽  
Vol 118 (34) ◽  
pp. e2106881118
Author(s):  
Naman K. Gupta ◽  
Christopher McMahon ◽  
Ronny Sutarto ◽  
Tianyu Shi ◽  
Rantong Gong ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Symmetry Breaking ◽  
Cuprate Superconductors ◽  
Rotational Symmetry ◽  
Density Wave ◽  
Charge Order ◽  
Pseudogap Phase ◽  
Correlated Electron ◽  
The Relationship ◽  
Electronic Nematicity

During the last decade, translational and rotational symmetry-breaking phases—density wave order and electronic nematicity—have been established as generic and distinct features of many correlated electron systems, including pnictide and cuprate superconductors. However, in cuprates, the relationship between these electronic symmetry-breaking phases and the enigmatic pseudogap phase remains unclear. Here, we employ resonant X-ray scattering in a cuprate high-temperature superconductor La1.6−xNd0.4SrxCuO4 (Nd-LSCO) to navigate the cuprate phase diagram, probing the relationship between electronic nematicity of the Cu 3d orbitals, charge order, and the pseudogap phase as a function of doping. We find evidence for a considerable decrease in electronic nematicity beyond the pseudogap phase, either by raising the temperature through the pseudogap onset temperature T* or increasing doping through the pseudogap critical point, p*. These results establish a clear link between electronic nematicity, the pseudogap, and its associated quantum criticality in overdoped cuprates. Our findings anticipate that electronic nematicity may play a larger role in understanding the cuprate phase diagram than previously recognized, possibly having a crucial role in the phenomenology of the pseudogap phase.

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