Elastic and specific heat critical properties of La1.85Sr0.15CuO4

Nyhus, J.; Thisted, U.; Kikugawa, Naoki; Suzuki, Takashi; Fossheim, K.

doi:10.1016/s0921-4534(01)01257-6

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…In this case, though, there is a priori no reason for C s to be minimum at T c . Note that this behavior is distinct from the Testardi-behavior seen in other superconductors, where strain couples to the squared SC order parameter, |Ψ| 2 , and changes the transition temperature T c → T c (ε ab ), making the elastic modulus behave very similar to minus the heat capacity at the transition [28,29]. Here, symmetry prohibits such a coupling and non-Testardi behavior is expected at T c .…”

Section: T (K)mentioning

confidence: 78%

Effects of Nematic Fluctuations on the Elastic Properties of Iron Arsenide Superconductors

et al. 2010

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We demonstrate that the changes in the elastic properties of the FeAs systems, as seen in our resonant ultrasound spectroscopy data, can be naturally understood in terms of fluctuations of emerging nematic degrees of freedom. Both the softening of the lattice in the normal, tetragonal phase as well as its hardening in the superconducting phase are consistently described by our model. Our results confirm the view that structural order is induced by magnetic fluctuations.

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Section: T (K)mentioning

confidence: 78%

Effects of Nematic Fluctuations on the Elastic Properties of Iron Arsenide Superconductors

et al. 2010

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“…Although the singular part of the specific heat is small compared to the phonon contribution and inhomogeneities set limits in exploring the critical regime [14,46] the measurements on nearly optimally doped YBa 2 Cu 3 O 7−δ [14,89] and La 2−x Sr x CuO 4 [90] point clearly to 3D-XY critical behavior. Experimentally it is well established that the specific heat anomaly and with that the critical amplitude A + decreases dramatically by approaching the underdoped limit (2D-QSI criticality) [91][92][93].…”

Section: Experimental Evidence For the Universal 3d-xy-and 2d-qsi-sca...mentioning

confidence: 99%

Relationship between and implications of the isotope and pressure effects on transition temperature, penetration depths and conductivities

Schneider

2004

Physica Status Solidi (b)

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It is shown that the empirical relations between transition temperature, normal state conductivity linearly extrapolated to the value at the transition temperature, zero temperature penetration depths, etc., as observed in a rich variety of cuprate superconductors, are remarkably consistent with the universal critical properties of anisotropic systems which fall into the 3D-XY universality class and undergo a crossover to a quantum critical point in 2D. The variety includes n-and p-type cuprates, comprises the underdoped and overdoped regimes and the consistency extends up to six decades in the scaling variables. The resulting scaling relations for the oxygen isotope hydrostatic pressure effects agree with the experimental data and reveal that these effects originate from local lattice distortions preserving the volume of the unit cell. These observations single out 3D and anisotropic microscopic models which incorporate local lattice distortions, fall in the experimentally accessible regime into the 3D-XY universality class, and incorporate the crossover to 2D quantum criticality where superconductivity disappears.

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Strong diamagnetic response and specific heat anomaly above Tc in underdoped La2−xSrxCuO4

Thisted¹,

Nyhus²,

Suzuki³

et al. 2004

Physica C: Superconductivity

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Elastic and specific heat critical properties of La1.85Sr0.15CuO4

Cited by 6 publications

References 8 publications

Effects of Nematic Fluctuations on the Elastic Properties of Iron Arsenide Superconductors

Effects of Nematic Fluctuations on the Elastic Properties of Iron Arsenide Superconductors

Relationship between and implications of the isotope and pressure effects on transition temperature, penetration depths and conductivities

Strong diamagnetic response and specific heat anomaly above Tc in underdoped La2−xSrxCuO4

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