On the “s” and “d” wave symmetry in high-T c cuprate superconductors

2007 ◽  
pp. 151-151
Author(s):  
K. Alex Müller
Keyword(s):  
Cuprate Superconductors ◽  
Wave Symmetry ◽  
D Wave

On the macroscopic s- and d-wave symmetry in cuprate superconductors

2003 ◽  
Vol 387 (1-2) ◽  
pp. 57
Author(s):  
K.A. Müller
Keyword(s):  
Cuprate Superconductors ◽  
Wave Symmetry ◽  
D Wave

On the macroscopic s- and d -wave symmetry in cuprate superconductors

2002 ◽  
Vol 82 (5) ◽  
pp. 279-288 ◽  
Author(s):  
K. A. Müller
Keyword(s):  
Cuprate Superconductors ◽  
Wave Symmetry ◽  
D Wave

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.

DISORDER AND QUANTUM CRITICALITY IN d-WAVE SUPERCONDUCTORS

2004 ◽  
Vol 18 (07) ◽  
pp. 949-959 ◽  
Author(s):  
JULIA S. MEYER ◽  
IGOR V. GORNYI ◽  
ALEXANDER ALTLAND
Keyword(s):  
Order Parameter ◽  
Cuprate Superconductors ◽  
Quantum Critical Point ◽  
Wave System ◽  
Superconducting Transition ◽  
Relaxation Rates ◽  
Wave Symmetry ◽  
Clean System ◽  
System Properties ◽  
D Wave

To explain experimentally observed quasiparticle relaxation rates in the cuprate superconductors, Sachdev and collaborators recently proposed that the d-wave system may be close to a quantum critical point towards a superconducting state with an additional order parameter component of is- or id-wave symmetry. In the proximity of the transition, dynamical order parameter fluctuations modify the system properties. Here, we explore the influence of disorder on this interacting fluctuation regime. Our main finding is that unlike in the clean system, significant qualitative differences between is and id exist: In the is-case, due to the disorder-enhanced low-energy density of states, a secondary superconducting transition (with a strongly disorder-dependent Tc) takes place. In contrast, in the id-case essential features of the clean scenario are left intact by the disorder.

scholarly journals Reservoir Layers in High Tc Mercury Cuprates

1999 ◽  
Vol 574 ◽  
Author(s):  
T. H. Geballe ◽  
Boris Y. Moyzhes ◽  
P. H. Dicktnson
Keyword(s):  
Effective Mass ◽  
Cuprate Superconductors ◽  
Single Site ◽  
Pairing Interaction ◽  
High Tc ◽  
Wave Symmetry ◽  
Mercury Cuprates ◽  
Hg Cuprates ◽  
D Wave ◽  
Phase Differences

AbstractWe put forward the hypothesis that cations with 6s electrons (Hg,Tl,Pb,Bi) in the charge reservoir layers of high Tc cuprate superconductors actively participate in the pairing interaction as negative-U centers. We further argue that the Hg-cuprates are outstanding superconductors (Tc > 160 K) because they can exist as two-ion negative-U centers, . Their electrons are less localized than in single-site centers (negative-U or bipolaron) and can have a strong pairing interaction with a smaller increase in effective mass. The centers are oriented in the x and y directions and can have phase differences compatible with the d-wave symmetry of the CuO2 planes.

scholarly journals Higher anisotropic d-wave symmetry in cuprate superconductors

1999 ◽  
Vol 11 (30) ◽  
pp. L371-L377 ◽  
Author(s):  
Haranath Ghosh
Keyword(s):  
Cuprate Superconductors ◽  
Wave Symmetry ◽  
D Wave

Theory for electron- and hole-doped cuprate superconductors: d -wave symmetry order parameter

2001 ◽  
Vol 53 (3) ◽  
pp. 371-377 ◽  
Author(s):  
D Manske ◽  
I Eremin ◽  
K. H Bennemann
Keyword(s):  
Order Parameter ◽  
Cuprate Superconductors ◽  
Wave Symmetry ◽  
D Wave

Effects of d-wave symmetry in high Tc step-edge Josephson junctions

2000 ◽  
Vol 341-348 ◽  
pp. 1473-1474 ◽  
Author(s):  
Soon-Gul Lee ◽  
Yunseok Hwang ◽  
Jin-Tae Kim ◽  
Gun Yong Sung
Keyword(s):  
Josephson Junctions ◽  
Step Edge ◽  
High Tc ◽  
Wave Symmetry ◽  
D Wave

Influence of d-Wave Symmetry on Irreversibility Line and Critical Current Densities

2001 ◽  
Vol 40 (Part 2, No. 10A) ◽  
pp. L1022-L1025 ◽  
Author(s):  
Satoshi Awaji ◽  
Kazuo Watanabe
Keyword(s):  
Critical Current ◽  
Irreversibility Line ◽  
Wave Symmetry ◽  
Current Densities ◽  
D Wave
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