scholarly journals NEUTRON SCATTERING SIGNATURE OF d-DENSITY WAVE ORDER IN THE CUPRATES

2001 ◽  
Vol 15 (21) ◽  
pp. 2901-2909 ◽  
Author(s):  
SUDIP CHAKRAVARTY ◽  
HAE-YOUNG KEE ◽  
CHETAN NAYAK
Keyword(s):  
High Temperature ◽  
Neutron Scattering ◽  
Order Parameter ◽  
Recent Experiment ◽  
High Temperature Superconductors ◽  
Density Wave ◽  
Polarization Dependence ◽  
Bilayer System ◽  
Pseudogap Phase ◽  
Parameter Theory

An ordered d-density wave (DDW) state has been proposed as an explanation of the pseudogap phase in underdoped high-temperature superconductors. The staggered currents associated with this order have signatures which are qualitatively different from those of ordered spins. We apply the order parameter theory to an orthorhombic bilayer system and show that the expected magnitude as well as the momentum, energy, and polarization dependence of the consequent neutron scattering is consistent with the findings of a recent experiment.

scholarly journals MICROMAGNETISM IN URu2Si2 AND HIGH TEMPERATURE SUPERCONDUCTORS

2002 ◽  
Vol 16 (11n12) ◽  
pp. 1667-1671 ◽  
Author(s):  
ATTILA VIROSZTEK ◽  
KAZUMI MAKI ◽  
BALÁZS DÓRA
Keyword(s):  
High Temperature ◽  
Neutron Scattering ◽  
Spin Density ◽  
High Temperature Superconductors ◽  
Density Wave ◽  
Spin Density Wave ◽  
Scattering Data ◽  
Density Waves ◽  
Pseudogap Phase ◽  
Optical Dichroism

It has been proposed, that unconventional density waves (UDW) are possible candidates for systems with hidden order parameter. Unlike in conventional density waves, no periodic modulation of either the charge-, or the spin-density is present in UDW, in spite of a clear thermodynamic signal. Although the unconventional spin density wave (USDW) has been suggested for the "antiferromagnetic" phase of URu2Si2 , the micromagnetism seen by neutron scattering has not been understood. We present here the calculation of the local spin density due to impurities in USDW, which describes quantitatively the neutron scattering data by Amitsuka et al. Further, we propose that the pseudogap phase in high temperature superconductors (HTSC) should also be USDW. Strong evidence for this are the micromagnetism seen by Sidis et al., and the optical dichroism seen by Campuzano et al.

What is the Symmetry of the High-Tc Order Parameter?

1998 ◽  
Vol 12 (29n31) ◽  
pp. 2920-2931 ◽  
Author(s):  
Richard A. Klemm
Keyword(s):  
High Temperature ◽  
Order Parameter ◽  
High Temperature Superconductors ◽  
Density Wave ◽  
Spin Density Wave ◽  
Superconducting Gap ◽  
S Wave ◽  
Orbital Symmetry ◽  
High Tc ◽  
Phase Sensitive

In recent years, there has been a raging controversy regarding the orbital symmetry of the superconducting order parameter (OP) in the high temperature superconductors. Many experiments were interpreted in terms of a dx2-y2-wave OP, but many others were interpreted in terms of a more conventional s-wave OP. We review the problems of both intrinsic and extrinsic natures with the phase-sensitive experiments on YBCO. We further show that the photoemission experiments of the purported superconducting gap in Bi2Sr2CaCu2O 8+δ are entirely consistent with charge- and/or spin-density wave formation in that material. The presence of such density waves greatly complicates the analysis of most experiments. Hence, we conclude that the orbital symmetry of the superconducting OP is still unknown in any of the high temperature superconductors.

scholarly journals Energy Scale of the Charge Density Wave in Cuprate Superconductors

Proceedings ◽  
2019 ◽  
Vol 26 (1) ◽  
pp. 20
Author(s):  
Sacuto ◽  
Loret ◽  
Auvray ◽  
Civelli ◽  
Indranil ◽  
...  
Keyword(s):  
High Temperature ◽  
Charge Density ◽  
Charge Density Wave ◽  
Cuprate Superconductors ◽  
High Temperature Superconductors ◽  
Density Wave ◽  
Energy Scale ◽  
Hole Doping ◽  
Wide Range

The cuprate high temperature superconductors develop spontaneous charge density wave(CDW) order below a temperature TCDW and over a wide range of hole doping (p). [...]

Sign in / Sign up

Export Citation Format

Share Document