Magnetic-field-induced spin-density wave in high-temperature superconductors

The nature of vortex structure in the mixed state of high-temperature superconductors (HTS) is investigated by solving the Bogoliubov-de Gennes equations with consideration of competition between antiferromagnetic (AF) and d-wave superconductivity (DSC) orders. By varying the applied magnetic field and temperature, the geometry of vortex structure can take two different forms: conventional vortex lattice (triangular or square), or vortex stripe phases where all the order parameters including spin density wave, charge density wave and superconducting order exhibit stripe-like behavior. This novel vortex stripe phases may show up at low temperature and adjacent to upper critical field H c2 Phase diagram of temperature dependence of H c2 will be presented. Our results may shed light on the understanding of the low-temperature H c2 anomalies in some HTS. New experiments are proposed to test our predictions.

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MICROMAGNETISM IN URu2Si2 AND HIGH TEMPERATURE SUPERCONDUCTORS

International Journal of Modern Physics B ◽

10.1142/s0217979202011135 ◽

2002 ◽

Vol 16 (11n12) ◽

pp. 1667-1671 ◽

Cited By ~ 27

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.

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Phonon response of the high‐temperature spin‐density‐wave superconductors

Phase Transitions ◽

10.1080/01411598908242377 ◽

1989 ◽

Vol 19 (1-3) ◽

pp. 15-26 ◽

Cited By ~ 4

Author(s):

S. N. Behera ◽

S. Bhattacharya

Keyword(s):

High Temperature ◽

Spin Density ◽

Density Wave ◽

Spin Density Wave

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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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