Metal-to-insulator crossover and pseudogap in single-layer compound BiSrCuO single crystals in high magnetic fields
arXiv:cond-mat/0412050 · doi:10.1103/PhysRevB.70.184524
Abstract
The in-plane and the out-of-plane magneto-transport in magnetic fields up to 28 T has been investigated in a series of high quality, single crystal, hole-doped La-free Bi2201 cuprates for a wide doping range and over a wide range of temperatures down to 40 mK. With decreasing hole concentration going from the overdoped (p=0.2) to the underdoped (p=0.12) regimes, a crossover from a metallic to and insulating behavior of is observed in the low temperature normal state, resulting in a disorder induced metal insulator transition. In the zero temperature limit, the normal state ratio of the heavily underdoped samples in pure Bi2201 shows an anisotropic 3D behavior, in striking contrast with that observed in La-doped Bi2201 and LSCO systems. Our data strongly support that that the negative out-of-plane magnetoresistance is largely governed by interlayer conduction of quasiparticles in the superconducting state, accompanied by a small contribution of normal state transport associated with the field dependent pseudogap. Both in the optimal and overdoped regimes, the semiconducting behavior of persists even for magnetic fields above the pseudogap closing field . The method suggested by Shibauchi \textit{et al.} (Phys. Rev. Lett. \textbf{86}, 5763, (2001)) for evaluating is unsuccessful for both under- and overdoped Bi2201 samples. Our findings suggest that the normal state pseudogap is not always a precursor of superconductivity.
arXiv comment11 pages, 8 figures, published in PRB Nov 2004
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Cited by in corpus (12)
- Disorder, Metal-Insulator crossover and Phase diagram in high-Tc cuprates
- Heat transport in Bi_{2+x}Sr_{2-x}CuO_{6+δ}: departure from the Wiedemann-Franz law in the vicinity of the metal-insulator transition
- Spin-glass state of vortices in YBa2Cu3Oy and La2-xSrxCuO4 below the metal-to-insulator crossover
- Transport signatures of the pseudogap critical point in the cuprate superconductor BiSrLaCuO
- Growth and Characterization of BiSrCuO Single Crystals
- Growth and post-annealing studies of La-Bi2201 single crystals
- Vortex-like excitations in a non-superconducting single-layer compound BiSrCuO single crystal in high magnetic fields
- Pseudogap Behavior Revealed in Interlayer Tunneling in Overdoped BiSrCaCuO
- In-plane current-voltage characteristics and oscillatory Josephson-vortex flow resistance in La-free BiSrCuO single crystals in high magnetic fields
- c-Axis longitudinal magnetoresistance of the electron-doped superconductor Pr1.85Ce0.15CuO4
- Persistence of vortexlike phase fluctuations in underdoped to heavily overdoped Bi-2201 cuprates
- Gap like structure in a nonsuperconducting layered oxycarbonate BiSrCuCOO single crystal