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arXiv · 0710.4612

Quantum Phase Transition in the Normal State of High-Tc Cuprates at Optimum Doping

F. F. Balakirev·J. B. Betts·A. Migliori·I. Tsukada·Yoichi Ando·G. S. Boebinger
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Abstract

By using a 60 T magnetic field to suppress superconductivity in La2-pSrpCuO4, (LSCO) we reveal an anomalous peak in the Hall number, located at optimum doping and developing at temperatures below the zero-field superconducting transition temperature, Tc. The anomaly bears a striking resemblance to observations in Bi2Sr2-xLaxCuO6+delta (BSLCO) [F. F. Balakirev et al., Nature (London) 424, 912 (2003)], suggesting a normal state phenomenology common to the cuprates that underlies the high-temperature superconducting phase. The peak is ascribed to the transformation of the "Fermi arcs" into a conventional FS, the signature of a Fermi surface reconstruction associated with a quantum phase transition (QPT) near optimum doping and co-incident with the collapse of the pseudogap state.

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F. F. Balakirev, J. B. Betts, A. Migliori, I. Tsukada, Yoichi Ando, G. S. Boebinger. 2008-07-23. Quantum Phase Transition in the Normal State of High-Tc Cuprates at Optimum Doping. https://doi.org/10.1103/physrevlett.102.017004

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