Deviations from the extended London model at high magnetic fields in YBa2Cu3O7

被引：5

作者：

Campillo, E. ^{[1
]}

Bartkowiak, M. ^{[2
]}

Riyat, R. ^{[3
]}

Jellyman, E. ^{[3
]}

Cameron, A. S. ^{[4
]}

Holmes, A. T. ^{[5
]}

Prokhnenko, O. ^{[2
]}

Stein, W. -D. ^{[2
]}

Erb, A. ^{[6
]}

Forgan, E. M. ^{[3
]}

Blackburn, E. ^{[1
]}

机构：

[1] Lund Univ, Div Synchrotron Radiat Res, SE-22100 Lund, Sweden

[2] Helmholtz Zentrum Berlin Mat & Energie, Hahn Meitner Pl 1, D-14109 Berlin, Germany

[3] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[4] Tech Univ Dresden, Inst Festkorperphys & Mat Phys, D-01069 Dresden, Germany

[5] European Spallat Source ERIC, POB 176, SE-22100 Lund, Sweden

[6] BAdW, Walther Meissner Inst, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW B | 2022年 / 105卷 / 18期

关键词：

VORTEX LATTICE SYMMETRY; ELECTRONIC-STRUCTURE; NEUTRON-SCATTERING; SINGLE-CRYSTAL; GROWTH; STATE;

D O I：

10.1103/PhysRevB.105.184508

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the evolution with the magnetic field and the temperature of the vortex lattice (VL) in fully oxygenated YBa2Cu3O7 as studied by time-of-flight small-angle neutron scattering. Using the High Field Magnet/Extreme Environment Diractometer beamline at Helmholtz-Zentrum Berlin, we have obtained data up to 25.9 T???much higher than data available previously. Our VL structure results are consistent with the progressive suppression by the field of the superconductivity along the crystallographic b (CuO chain) direction and an accompanying shift of the nodal directions as the field is increased. The intensity of the diffracted signal reveals the spatial variation of magnetization caused by the VL (the ???form factor???). Instead of a rapid falloff with the field, as seen in superconductors with smaller upper critical fields, we find that the form factor is almost constant with the field above -12 T. We speculate that this is due to Pauli paramagnetic effects.

引用

页数：8

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