STRIPES, PSEUDOGAP AND SC-SDW RESONANCE IN HTSC PEROVSKITES

The significant role of spin stripes in HTSC system is emphasized. The evidence for spin density wave (SDW) nature of pseudogap is presented. The dependence of CuO2 lattice modulation amplitude on the temperature and applied magnetic field is studied. The indication to possible SDW-SC resonance is obtained. The possible amplification of Tc with using of artificial magnetic stripes with taking into account their dynamic nature is proposed. An example of twofold amplification of Tc in thin single-crystalline film of La-based cuprate is presented.

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Magnetic-field behavior of the spin-density-wave state in (TMTSF)2AsF6

Physical Review B ◽

10.1103/physrevb.52.15983 ◽

1995 ◽

Vol 52 (22) ◽

pp. 15983-15991 ◽

Cited By ~ 11

Author(s):

J. L. Musfeldt ◽

M. Poirier ◽

P. Batail ◽

C. Lenoir

Keyword(s):

Magnetic Field ◽

Spin Density ◽

Density Wave ◽

Spin Density Wave ◽

Wave State ◽

Field Behavior

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COLLECTIVE FIELD THEORY TO MAGNETIC-FIELD-INDUCED SPIN-DENSITY-WAVE-STATE IN BECHGAARD SALTS, (TMTSF)2X

International Journal of Modern Physics B ◽

10.1142/s0217979293003292 ◽

1993 ◽

Vol 07 (19) ◽

pp. 3415-3421 ◽

Cited By ~ 1

Author(s):

ALEXANDRE S. ROZHAVSKY

Keyword(s):

Magnetic Field ◽

Spin Density ◽

Chemical Potential ◽

Density Wave ◽

Spin Density Wave ◽

Hall Conductivity ◽

Chiral Anomaly ◽

Threshold Field ◽

Wave State ◽

Extended States

A field description of spin-density-wave (SDW) in a quasi-two-dimensional metal with open Fermi surface in magnetic field, is proposed. The SDW transition temperature, T c (H), and the Hall conductivity σxy, are calculated. The dependence T c (H) is found to be different from that of the Bardeen-Cooper-Schrieffer model, in particular, a threshold field, H c , found its natural explanation. It is proved that the quantized Hall conductivity arises from the chiral anomaly terms in the effective action provided there is pinning of chemical potential in the gap of extended states.

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High magnetic field NMR investigation of the spin density wave phase of TMTSF2PF6

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:20020445 ◽

2002 ◽

Vol 12 (9) ◽

pp. 389-389

Author(s):

W. G. Clark ◽

F. Zamborsky ◽

B. Alavi ◽

P. Vonlanthen ◽

W. Moulton ◽

...

Keyword(s):

Magnetic Field ◽

Spin Density ◽

Density Wave ◽

Spin Density Wave ◽

Proton Relaxation ◽

High Magnetic Fields ◽

Organic Conductor ◽

First Order ◽

The Magnetic Field ◽

Very High

We report proton NMR measurements of the effect of very high magnetic fields up to 44.7 T (1.9 GHz) on the spin density wave (SDW) transition of the organic conductor TMTSF2PF6. Up to 1.8 GHz, no effect of critical slowing close to the transition is seen on the proton relaxation rate (1/T1), which is determined by the SDW fluctuations associated with the phase transition at the NMR frequency. Thus, the correlation time for such fluctuations is less than $1O^{-10}$s. A possible explanation for the absence of longer correlation times is that the transition is weakly first order, so that the full critical divergence is never achieved. The measurements also show a dependence of the transition temperature on the orientation of the magnetic field and a quadratic dependence on its magnitude that agrees with earlier transport measurements at lower fields. The UCLA part of this work was supported by NSF Grant DMR-0072524.

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