Magnetization and resistivity measurements of the first-order vortex phase transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><

Sasagawa, T.; Togawa, Yoshihiko; Shimoyama, J.; Kapitulnik, A.; Kitazawa, K.; Kishio, K.

doi:10.1103/physrevb.61.1610

Cited by 48 publications

(53 citation statements)

References 62 publications

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“…In more isotropic materials the data are more confusing. In LaSCCO (Divakar et al, 2004;Sasagawa et al, 2000) the GT line is closer to the "melting" section of the ODT line still crossing it. It is more difficult to characterize the nature of the GT transition as a "symmetry breaking".…”

Section: Complexity Of the Vortex Matter Physicsmentioning

confidence: 99%

“…2b. It resembles for example, an experimental phase diagram of high T c superconductor (Divakar et al, 2004;Sasagawa et al, 2000) LaSCO Fig. 2a.…”

Section: Complexity Of the Vortex Matter Physicsmentioning

confidence: 99%

“…Paul et al, 1998;Sasagawa et al, 2000). They might be either first or second order and also lead to a peak in the critical current (Chang et al, 1998a,b;Klironomos and Dorsey, 2003;Park and Huse, 1998;Rosenstein and Knigavko, 1999).…”

Section: Complexity Of the Vortex Matter Physicsmentioning

confidence: 99%

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Ginzburg-Landau theory of type II superconductors in magnetic field

2010

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Thermodynamics of type II superconductors in electromagnetic field based on the GinzburgLandau theory is presented. The Abrikosov flux lattice solution is derived using an expansion in a parameter characterizing the "distance" to the superconductor -normal phase transition line. The expansion allows a systematic improvement of the solution. The phase diagram of the vortex matter in magnetic field is determined in detail. In the presence of significant thermal fluctuations on the mesoscopic scale (for example in high Tc materials) the vortex crystal melts into a vortex liquid. A quantitative theory of thermal fluctuations using the lowest Landau level approximation is given. It allows to determine the melting line and discontinuities at melt, as well as important characteristics of the vortex liquid state. In the presence of quenched disorder (pinning) the vortex matter acquires certain "glassy" properties. The irreversibility line and static properties of the vortex glass state are studied using the "replica" method. Most of the analytical methods are introduced and presented in some detail. Various quantitative and qualitative features are compared to experiments in type II superconductors, although the use of a rather universal Ginzburg -Landau theory is not restricted to superconductivity and can be applied with certain adjustments to other physical systems, for example rotating Bose -Einstein condensate.

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Section: Complexity Of the Vortex Matter Physicsmentioning

confidence: 99%

“…2b. It resembles for example, an experimental phase diagram of high T c superconductor (Divakar et al, 2004;Sasagawa et al, 2000) LaSCO Fig. 2a.…”

Section: Complexity Of the Vortex Matter Physicsmentioning

confidence: 99%

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Ginzburg-Landau theory of type II superconductors in magnetic field

2010

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“…In La214 the degree of anisotropy (γ ≈ 20 for x=0. 15) lies between that of the YBa 2 Cu 3 O x (Y123) and Bi 2 Sr 2 CaCu 2 O 8+x (Bi2212) materials [2]. The cuprates are also extreme type-II superconductors, indicated by the high value of the Ginzburg-Landau parameter κ = λ/ξ , where ξ is the superconducting coherence length.…”

mentioning

confidence: 99%

Direct Evidence for an Intrinsic Square Vortex Lattice in the Overdoped High-TcSuperconductorLa1.83
Gilardi
¹
,
Mesot
²
,
Drew
³

et al. 2002
Phys. Rev. Lett.
111
6
70
0
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“…To the best of our knowledge, the reported FC/ZFC ratio for high-quality crystals does not exceed 80%. Examples of this are (La,Sr) 2 CuO 4 (~ 50% [22] ), YBa 2 Cu 3 O 6+δ (~ 40-80% [23] ), and prior work on Hg1201 (~ 30-40% [24] ). The difference between ZFC and FC curves is attributed to magnetic flux trapped while cooling the sample in the field.…”

mentioning

confidence: 99%

Demonstrating the model nature of the high-temperature superconductorHgBa2CuO4+δ

Barišić

Zhao

et al. 2008

Phys. Rev. B

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The compound HgBa 2 CuO 4+δ (Hg1201) exhibits a simple tetragonal crystal structure and the highest superconducting transition temperature (T c ) among all single Cu-O layer cuprates, with T c = 97 K (onset) at optimal doping. Due to a lack of sizable single crystals, experimental work on this very attractive system has been significantly limited. Thanks to a recent breakthrough in crystal growth, such crystals have now become available. [1] Here, we demonstrate that it is possible to identify suitable heat treatment conditions to systematically and uniformly tune the hole concentration of Hg1201 crystals over a wide range, from very underdoped (T c = 47 K, hole concentration p ~ 0.08) to overdoped (T c = 64 K, p ~ 0.22). We then present quantitative magnetic susceptibility and DC charge transport results that reveal the very high-quality nature of the studied crystals. Using XPS on cleaved samples, we furthermore demonstrate that it is possible to obtain large surfaces of good quality. These characterization measurements demonstrate that Hg1201 should be viewed as a model hightemperature superconductor, and they provide the foundation for extensive future experimental work.

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Magnetization and resistivity measurements of the first-order vortex phase transition in(La1−xSrx<

Cited by 48 publications

References 62 publications

Ginzburg-Landau theory of type II superconductors in magnetic field

Ginzburg-Landau theory of type II superconductors in magnetic field

Direct Evidence for an Intrinsic Square Vortex Lattice in the Overdoped High-TcSuperconductorLa1.83
Gilardi
¹
,
Mesot
²
,
Drew
³

et al. 2002
Phys. Rev. Lett.
111
6
70
0
View full text Add to dashboard Cite

Demonstrating the model nature of the high-temperature superconductorHgBa2CuO4+δ

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Magnetization and resistivity measurements of the first-order vortex phase transition in(La1−xSrx<

Cited by 48 publications

References 62 publications

Ginzburg-Landau theory of type II superconductors in magnetic field

Ginzburg-Landau theory of type II superconductors in magnetic field

Direct Evidence for an Intrinsic Square Vortex Lattice in the Overdoped High-TcSuperconductorLa1.83Gilardi1, Mesot2, Drew3 et al. 2002Phys. Rev. Lett.1116700View full textAdd to dashboardCite

Demonstrating the model nature of the high-temperature superconductorHgBa2CuO4+δ

Contact Info

Product

Resources

About

Direct Evidence for an Intrinsic Square Vortex Lattice in the Overdoped High-TcSuperconductorLa1.83
Gilardi
¹
,
Mesot
²
,
Drew
³

et al. 2002
Phys. Rev. Lett.
111
6
70
0
View full text Add to dashboard Cite