Layered Cuprates with Double Copper Layers: Relationships Between Structure, Nonstoichiometry and Superconductivity

AbstractThe hallmark of superconductivity is the rigidity of the quantum-mechanical phase of electrons, responsible for superfluid behavior and Meissner effect. The strength of the phase stiffness is set by the Josephson coupling, which is strongly anisotropic in layered cuprates. So far, THz light pulses have been used to achieve non-linear control of the out-of-plane Josephson plasma mode, whose frequency lies in the THz range. However, the high-energy in-plane plasma mode has been considered insensitive to THz pumping. Here, we show that THz driving of both low-frequency and high-frequency plasma waves is possible via a general two-plasmon excitation mechanism. The anisotropy of the Josephson couplings leads to markedly different thermal effects for the out-of-plane and in-plane response, linking in both cases the emergence of non-linear photonics across Tc to the superfluid stiffness. Our results show that THz light pulses represent a preferential knob to selectively drive phase excitations in unconventional superconductors.

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Layered Cuprates with the T* Structure: Structural and Conducting Properties

Journal of Solid State Chemistry ◽

10.1006/jssc.1995.1142 ◽

1995 ◽

Vol 115 (2) ◽

pp. 332-346 ◽

Cited By ~ 5

Author(s):

Alexandros Lappas ◽

Kosmas Prassides

Keyword(s):

Layered Cuprates

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SYNTHESIS OF NEW 1223-TYPE LAYERED CUPRATE (Tl, V) (Sr, Ba)2Ca2Cu3O9 WITH TC(ρ=0) ABOVE 110 K

Modern Physics Letters B ◽

10.1142/s0217984993000746 ◽

1993 ◽

Vol 07 (11) ◽

pp. 761-769 ◽

Cited By ~ 3

Author(s):

Z.Y. CHEN ◽

Z.Z. SHENG ◽

Y.F. LI ◽

D.O. PEDERSON

Keyword(s):

X Ray Diffraction ◽

X Ray ◽

Practical Applications ◽

Layered Cuprates

A new series of 1223-type (Tl, V)-based layered cuprates (Tl, V)(Sr,Ba) 2 Ca 2 Cu 3 O 9 has been successfully synthesized and identified by powder X-ray diffraction. Partial substitutions of V for Tl and Ba for Sr promote the formation of (Tl, V)-based 1223-type compounds. Nominal samples ( Tl 1−x V x) ( Sr 2−y Ba y) Ca 2 Cu 3 O z with x=0.25–0.50 and y=0.25–1.50 are pure or nearly-pure 1223 phase and exhibit TC(ρ=0) in the range of 100–110 K. This new (Tl, V)-based high TC material may be of importance in practical applications.

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EFFECTS OF c-AXIS HOPPING IN THE INTERLAYER TUNNELING MODEL OF HIGH-Tc LAYERED CUPRATES

International Journal of Modern Physics B ◽

10.1142/s0217979299001600 ◽

1999 ◽

Vol 13 (13) ◽

pp. 1619-1632

Author(s):

BIPLAB CHATTOPADHYAY ◽

A. N. DAS

Keyword(s):

Experimental Data ◽

Transition Temperature ◽

Cuprate Superconductors ◽

Interlayer Coupling ◽

Superconducting Gap ◽

Tunneling Model ◽

High Tc ◽

Optimal Doping ◽

Pair Tunneling ◽

Layered Cuprates

We consider the interlayer pair-tunneling model for layered cuprates, including an effective single particle hopping along the c-axis. A phenomenological suppression of the c-axis hopping matrix element, by the pseudogap in cuprate superconductors, is incorporated. At optimal doping, quantities characteristic to the superconducting state, such as the transition temperature and the superconducting gap are calculated. Results from our calculations are consistent with the experimental observations with the noteworthy point that, the superconducting gap as a function of temperature shows excellent match to the experimental data. Predictions within the model, regarding T c variation with interlayer coupling, are natural outcomes which could be tested further.

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Magnetism in the Layered Cuprates: µSR Studies

Materials Science Forum ◽

10.4028/www.scientific.net/msf.137-139.85 ◽

1993 ◽

Vol 137-139 ◽

pp. 85-102

Author(s):

R.L. Lichti

Keyword(s):

Layered Cuprates

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Synthesis of ruthenium-based layered cuprates in ammonium nitrate melt and their characterisation

Physica C Superconductivity ◽

10.1016/s0921-4534(02)02313-4 ◽

2003 ◽

Vol 387 (3-4) ◽

pp. 359-364 ◽

Cited By ~ 13

Author(s):

G.K. Strukova ◽

I.I. Zver’kova ◽

L.A. Dorosinskii ◽

D.V. Shovkun ◽

V.N. Zverev ◽

...

Keyword(s):

Ammonium Nitrate ◽

Layered Cuprates

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Polysomatic series in the structures of complex cuprates

Acta Crystallographica Section A Foundations of Crystallography ◽

10.1107/s0108767398016742 ◽

1999 ◽

Vol 55 (4) ◽

pp. 628-634 ◽

Cited By ~ 2

Author(s):

L. Leonyuk ◽

G.-J. Babonas ◽

V. Maltsev ◽

V. Rybakov

Keyword(s):

Structural Analysis ◽

Classification Scheme ◽

Modular Approach ◽

The Family ◽

Layered Cuprates

The modular approach was applied to analyse the structure of complex cuprates. The modular series of various types were distinguished in the family of layered cuprates making use of the classification scheme in a fragment approximation developed earlier. The polysomatic series were revealed in the groups of cuprates which were expected to possess the properties of both salt and oxide. The structure of the ladder-type cuprates was analysed in more detail. The present study has shown that the polysomatic model can be efficiently applied to the structural analysis of complex cuprates.

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