Phase diagram of cuprate superconductors at ultrahigh magnetic fields

The anisotropic vortex dynamics and phase diagram are determined for a YBa 2 Cu 3 O 7 single crystal with columnar defects oriented at ±7.5° relative to the crystalline c-axis. A second-order splayed-glass to vortex-liquid transition is manifested for magnetic fields nearly parallel to the columns via the critical scaling of vortex AC and DC transport properties. In contrast, for magnetic fields aligned close to the ab-plane, an XY-like vortex-glass transition prevails. For magnetic fields at intermediate angles, there is no evidence of any vortex phase transition, and the vortex dynamics is described in terms of the thermally activated flux flow model.

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Size and Compositional Effects on Contrast Efficiency of Functionalized Superparamagnetic Nanoparticles at Ultralow and Ultrahigh Magnetic Fields

The Journal of Physical Chemistry C ◽

10.1021/jp302758h ◽

2012 ◽

Vol 116 (33) ◽

pp. 17880-17884 ◽

Cited By ~ 12

Author(s):

Wei Wang ◽

Victor Pacheco ◽

Hans-Joachim Krause ◽

Yi Zhang ◽

Hui Dong ◽

...

Keyword(s):

Magnetic Fields ◽

Superparamagnetic Nanoparticles ◽

Ultrahigh Magnetic Fields ◽

Compositional Effects

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Magnetization process and magnetic structure of the TmFe2H3.4 hydride in ultrahigh magnetic fields up to 100 T

Journal of Magnetism and Magnetic Materials ◽

10.1016/s0304-8853(96)00661-0 ◽

1997 ◽

Vol 167 (3) ◽

pp. 229-236 ◽

Cited By ~ 6

Author(s):

N.V. Mushnikov ◽

N.K. Zajkov ◽

M.I. Bartashevich ◽

T. Goto ◽

H. Aruga-Katori ◽

...

Keyword(s):

Magnetic Fields ◽

Magnetic Structure ◽

Magnetization Process ◽

Ultrahigh Magnetic Fields

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Semiconductor-metal transition in FeSi in ultrahigh magnetic fields up to 450 T

JETP Letters ◽

10.1134/1.567872 ◽

1998 ◽

Vol 68 (4) ◽

pp. 350-355 ◽

Cited By ~ 22

Author(s):

Yu. B. Kudasov ◽

A. I. Bykov ◽

M. I. Dolotenko ◽

N. P. Kolokol’chikov ◽

M. P. Monakhov ◽

...

Keyword(s):

Magnetic Fields ◽

Ultrahigh Magnetic Fields

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What is strange about high-temperature superconductivity in cuprates?

International Journal of Modern Physics B ◽

10.1142/s0217979217450059 ◽

2017 ◽

Vol 31 (25) ◽

pp. 1745005

Author(s):

I. Božović ◽

X. He ◽

J. Wu ◽

A. T. Bollinger

Keyword(s):

Phase Diagram ◽

Cuprate Superconductors ◽

High Temperature Superconductivity ◽

Einstein Condensation ◽

Strongly Correlated ◽

Bose Einstein Condensation ◽

Ultimate Question ◽

Underdoped Cuprates ◽

Bose Einstein ◽

Superconducting Parameters

Cuprate superconductors exhibit many features, but the ultimate question is why the critical temperature ([Formula: see text]) is so high. The fundamental dichotomy is between the weak-pairing, Bardeen–Cooper–Schrieffer (BCS) scenario, and Bose–Einstein condensation (BEC) of strongly-bound pairs. While for underdoped cuprates it is hotly debated which of these pictures is appropriate, it is commonly believed that on the overdoped side strongly-correlated fermion physics evolves smoothly into the conventional BCS behavior. Here, we test this dogma by studying the dependence of key superconducting parameters on doping, temperature, and external fields, in thousands of cuprate samples. The findings do not conform to BCS predictions anywhere in the phase diagram.

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