Transport properties at the insulator–superconductor phase boundary of La2−xSrxCuO4 thin films

Wagner, Patrick; Ruan, K Q; Gordon, Ivan; Vanacken, Johan; Moshchalkov, Victor; Bruynseraede, Y.

doi:10.1016/s0921-4534(01)00125-3

Cited by 10 publications

(4 citation statements)

References 31 publications

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“…T he as-grown films were prepared by DC magnetron sputtering from stoichiometric targets [12,13]. The magnetoresistivity measurements were carried out at the pulsed field facility of the Katholieke Universiteit Leuven [14,15] by using a homemade flow-cryostat and 50 T coil.…”

Section: Expe Rime Ntal Re Sultsmentioning

confidence: 99%

High field magnetoresistivity of epitaxial La2−xSrxCuO4 thin films

Vanacken

Weckhuysen

Wambecq

et al. 2005

Physica C: Superconductivity and its Applications

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A large positive magnetoresistivity (up to tens of percents) is observed in both underdoped and overdoped superconducting La 2-x Sr x CuO 4 epitaxial thin films at temperatures far above the superconducting critical temperature T c . For the underdoped samples, this magnetoresistance far above T c cannot be described by the Kohler rule and we believe it is to be attributed to the influence of superconducting fluctuations. In the underdoped regime, the large magnetoresistance is only present when at low temperatures superconductivity occurs. T he strong magnetoresistivity, which persists even at temperatures far above T c , can be related to the pairs forming eventually the superconducting state below T c . Our observations support the idea of a close relation between the pseudogap and the superconducting gap and provide new indications for the presence of pairs above T c .

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Section: Expe Rime Ntal Re Sultsmentioning

confidence: 99%

High field magnetoresistivity of epitaxial La2−xSrxCuO4 thin films

Vanacken

Weckhuysen

Wambecq

et al. 2005

Physica C: Superconductivity and its Applications

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“…The home-made LSCO-films are deposited on a SrTiO 3 substrate using high pressure DC sputtering from stoichiometric targets [1]. For this work we made an underdoped sample with Sr-content 0.125.…”

Section: Resultsmentioning

confidence: 99%

Sign reversal of the Hall effect in an underdoped La1.875Sr0.125CuO4 epitaxial thin film

Wambecq

Mashkautsan

Vanacken

et al. 2006

Journal of Physics and Chemistry of Solids

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“…The as-grown La 2−x Sr x CuO 4 films were prepared by DC magnetron sputtering from stoechiometric targets either at KU Leuven [15] or by pulsed laser deposition at ITT Kanpur (see the elaboration conditions in [16]). The critical temperatures were determined as the transition mid-point temperatures obtained by measuring the resistance under zero magnetic field.…”

Section: Methodsmentioning

confidence: 99%

Experimental investigation of the magnetic field driven superconductor/ insulator transition in underdoped $La_{2-x}Sr_xCuO_4$ thin films

Léridon¹,

Vanhacken²,

Moshchalkov³

et al. 2012

Preprint

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The magnetic field driven superconductor/insulator transition is studied in a large variety of La2−xSrxCuO4 thin films of various Sr dopings. Temperature dependence of the resistivity down to 4.2 or 1.5 K under high pulsed magnetic field (up to 57 T) is analyzed. In particular, the existence of plateaus in the resistance versus temperature curves, in a limited range of temperature, for given values of the magnetic field is carefully investigated. It is shown to be associated to scaling behaviour of the resistance versus magnetic field curves, evocative of the presence of a quantum critical point. A three-dimensional (H,x,T) phase diagram is proposed, taking into account the intrinsic lamellar nature of the materials by the existence of a temperature crossover from quantum-two-dimensional to three-dimensional behavior.

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Transport properties at the insulator–superconductor phase boundary of La2−xSrxCuO4 thin films

Cited by 10 publications

References 31 publications

High field magnetoresistivity of epitaxial La2−xSrxCuO4 thin films

High field magnetoresistivity of epitaxial La2−xSrxCuO4 thin films

Sign reversal of the Hall effect in an underdoped La1.875Sr0.125CuO4 epitaxial thin film

Experimental investigation of the magnetic field driven superconductor/ insulator transition in underdoped $La_{2-x}Sr_xCuO_4$ thin films

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