scholarly journals Hot spots and transition fromd-wave to another pairing symmetry in the electron-doped cuprate superconductors

2004 ◽  
Vol 69 (14) ◽  
Author(s):  
V. A. Khodel ◽  
Victor M. Yakovenko ◽  
M. V. Zverev ◽  
Haeyong Kang
Keyword(s):  
Hot Spots ◽  
Cuprate Superconductors ◽  
Pairing Symmetry

Anomalous electron quasiparticle excitation spectrum in electron-doped cuprate superconductors

2020 ◽  
Vol 34 (19n20) ◽  
pp. 2040053
Author(s):  
Shuning Tan ◽  
Yingping Mou ◽  
Yiqun Liu ◽  
Shiping Feng
Keyword(s):  
Excitation Spectrum ◽  
Energy Dependence ◽  
Hot Spots ◽  
Cuprate Superconductors ◽  
Physical Origin ◽  
Quasiparticle Excitation ◽  
Scattering Rate ◽  
Peak Structure ◽  
Quasiparticle Scattering ◽  
Pronounced Peak

Within the framework of the kinetic energy-driven superconductivity, the complicated line shape in the electron quasiparticle excitation spectrum of the electron-doped cuprate superconductors is studied. It is shown that as in the hole-doped counterparts, the momentum and energy dependence of the quasiparticle scattering rate in the electron-doped cuprate superconductors has a well-pronounced peak structure at around the antinodal and nodal regions. However, this peak structure is absent from the hot spots. This special momentum and energy dependence of the quasiparticle scattering rate therefore generates a remarkable peak-dip-hump structure in the electron quasiparticle excitation spectrum of the electron-doped cuprate superconductors at around the antinodal and nodal regions except for at around the hot spots, where the peak-dip-hump structure is absent. The theory also indicates that there is a common physical origin for the peak-dip-hump structure both in the hole- and electron-doped cuprate superconductors.

Testing Polaron Coherence and the Pairing Symmetry in Cuprate Superconductors by Local Probe Methods

2010 ◽  
Vol 23 (3) ◽  
pp. 295-299 ◽  
Author(s):  
A. Bussmann-Holder ◽  
H. Keller ◽  
J. Mustre de Leon ◽  
A. Simon ◽  
A. R. Bishop ◽  
...  
Keyword(s):  
Cuprate Superconductors ◽  
Pairing Symmetry

TUNNELING SPECTROSCOPY OF THE ELECTRON-DOPED CUPRATE SUPERCONDUCTOR Pr2-xCexCuO4

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3175-3175
Author(s):  
A. BISWAS ◽  
P. FOURNIER ◽  
V. N. SMOLYANINOVA ◽  
H. BALCI ◽  
J. S. HIGGINS ◽  
...  
Keyword(s):  
Normal State ◽  
Cuprate Superconductors ◽  
Point Contact ◽  
Tunneling Spectroscopy ◽  
Pairing Symmetry ◽  
S Wave ◽  
Zero Bias ◽  
Wave Pairing ◽  
Wave Symmetry ◽  
D Wave

The properties of electron(n)-doped cuprate superconductors show significant deviations from those of their hold(p)-doped counterparts. Experiments prior to 2000 suggested an s-wave pairing symmetry as opposed to d-wave pairing symmetry in hole-doped cuprates. Recent experiments have suggested that n-doped cuprates have a d-wave pairing symmetry. However tunneling spectroscopy of these materials have not revealed a zero bias conductance peak (ZBCP), which is a classic signature of d-wave symmetry. We present the first tunneling spectroscopy data on n-doped Pr 2-x Ce x CuO 4 (PCCO) using point contact junctions which show a systematic evolution of the ZBCP. This method of junction fabrication is important as it allows the barrier strength between the normal and the superconducting electrodes to be varied. We show that this is essential to observing the ZBCP. The n-doped cuprates have a low Tc (~25 K ) and Hc2 (~10 T ). The low Hc2 enables us to obtain the normal state in PCCO at low temperatures. We have used this to probe the density of states in the normal state of PCCO. We observe an anomalous gap even in the normal state.1 This normal state gap (NSG) becomes smaller on the over-doped side. We discuss the behavior of this NSG in the context of the pseudogap which has been observed in hole-doped cuprates.

Tricrystal Tests of Pairing Symmetry in Cuprate Superconductors

1996 ◽  
pp. 43-47
Author(s):  
C. C. Tsuei ◽  
J. R. Kirtley ◽  
M. Rupp ◽  
J. Z. Sun ◽  
C. C. Chi ◽  
...  
Keyword(s):  
Cuprate Superconductors ◽  
Pairing Symmetry

Effect of Next-Nearest-Neighbor Electron Hopping on Superconducting Gap of Cuprate Superconductors

SPIN ◽  
2019 ◽  
Vol 09 (03) ◽  
pp. 1950016
Author(s):  
Pratima Beura ◽  
Kamal L. Mohanta
Keyword(s):  
Cuprate Superconductors ◽  
Nearest Neighbor ◽  
Chemical Potential ◽  
Coupling Parameter ◽  
Pairing Symmetry ◽  
Function Technique ◽  
Superconducting Gap ◽  
Temperature Dependent ◽  
Electron Hopping ◽  
Grid Points

We study here a single band Hamiltonian model to describe the effect of next-nearest-neighbor (NNN) electron hopping on superconducting gap in Cuprates. The Hamiltonian consists of nearest-neighbor (NN) and next-nearest-neighbor (NNN) electron hopping integrals between the copper sides. By taking d-wave pairing symmetry into account, BCS type superconducting interaction is studied. By applying Zubarev’s Green function technique, the total Hamiltonian is solved. From the correlation function, the temperature-dependent superconducting gap (SC) equation is derived and is computed self-consistently by using technique [Formula: see text] grid points of the electron momentum. By varying SC coupling, chemical potential, J-T coupling parameter and second-nearest-neighbor electron hopping integral, the evolution of the order parameter is investigated.

scholarly journals Evidence of Doping-Dependent Pairing Symmetry in Cuprate Superconductors

2001 ◽  
Vol 87 (8) ◽  
Author(s):  
N.-C. Yeh ◽  
C.-T. Chen ◽  
G. Hammerl ◽  
J. Mannhart ◽  
A. Schmehl ◽  
...  
Keyword(s):  
Cuprate Superconductors ◽  
Pairing Symmetry

Fractional Quantized Vortices as Direct Evidence of dx2-y2-Wave Pairing Symmetry up to Critical Temperature in High-Tc Cuprate Superconductors

2002 ◽  
Vol 41 (Part 2, No. 7A) ◽  
pp. L739-L741 ◽  
Author(s):  
Akira Sugimoto ◽  
Takashi Miyake ◽  
Tomohiro Takeda ◽  
Ienari Iguchi ◽  
Satoshi Kashiwaya
Keyword(s):  
Critical Temperature ◽  
Cuprate Superconductors ◽  
Direct Evidence ◽  
Pairing Symmetry ◽  
Quantized Vortices ◽  
High Tc ◽  
Wave Pairing

Pairing symmetry in cuprate superconductors

2000 ◽  
Vol 72 (4) ◽  
pp. 969-1016 ◽  
Author(s):  
C. C. Tsuei ◽  
J. R. Kirtley
Keyword(s):  
Cuprate Superconductors ◽  
Pairing Symmetry
Sign in / Sign up

Export Citation Format

Share Document