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4.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Z. Q. Liu; L. Sun; Z. Huang; C. J. Li; S. W. Zeng; K. Han; W. M. Lü; T Venkatesan; Ariando
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We report that in unannealed LaAlO3/SrTiO3 (LAO/STO) heterostructures the critical thickness for the appearance of the two-dimensional electron gas can be less than 4 unit cell (uc), the interface is conducting even for STO substrates with mixed terminations and the low-temperature resistance upturn in LAO/STO heterostructures with thick LAO layers strongly depends on laser fluence. Our experimental results provide fundamental insights into the different roles played by oxygen vacancies and...
Topics: Materials Science, Strongly Correlated Electrons, Condensed Matter
Source: http://arxiv.org/abs/1401.4991
66
66
Sep 21, 2013
09/13
Sep 21, 2013
by
Z. Q. Liu; W. M. Lü; X. Wang; Z. Huang; A. Annadi; S. W. Zeng; T. Venkatesan; Ariando
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We report novel magnetotransport properties of the low temperature Fermi liquid in SrTiO3-x single crystals. The classical limit dominates the magnetotransport properties for a magnetic field perpendicular to the sample surface and consequently a magnetic-field induced resistivity minimum emerges. While for the field applied in plane and normal to the current, the linear magnetoresistance (MR) starting from small fields ( < 0.5 T) appears. The large anisotropy in the transverse MRs reveals...
Source: http://arxiv.org/abs/1204.1901v1
54
54
Sep 20, 2013
09/13
Sep 20, 2013
by
S. W. Zeng; X. Wang; W. M. Lü; Z. Huang; M. Motapothula; Z. Q. Liu; Y. L. Zhao; A. Annadi; S. Dhar; H. Mao; W. Chen; T. Venkatesan; Ariando
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We report hole and electron doping in La-doped YBa$_2$Cu$_3$O$_y$(YBCO) thin films synthesized by pulsed laser deposition technique and subsequent \emph{in-situ} postannealing in oxygen ambient and vaccum. The $n$-type samples show a metallic behavior below the Mott limit and a high carrier density of $\sim2.8$ $\times$ 10$^{21}$ cm$^{-3}$ at room temperature (\emph{T}) at the optimally reduced condition. The in-plane resistivity ($\rho$$_{ab}$) of the $n$-type samples exhibits a quadratic...
Source: http://arxiv.org/abs/1207.5914v1
70
70
Sep 18, 2013
09/13
Sep 18, 2013
by
Z. Q. Liu; D. P. Leusink; X. Wang; W. M. Lü; K. Gopinadhan; A. Annadi; Y. L. Zhao; X. H. Huang; S. W. Zeng; Z. Huang; A. Srivastava; S. Dhar; T. Venkatesan; Ariando
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We report the optical, electrical transport, and magnetotransport properties of high quality oxygen deficient SrTiO3 (STO) single crystal film fabricated by pulsed laser deposition and reduced in the vacuum chamber. The oxygen vacancy distribution in the thin film is expected to be uniform. By comparing the electrical properties with oxygen deficient bulk STO, it was found that the oxygen vacancies in bulk STO is far from uniform over the whole material. The metal-insulator transition (MIT)...
Source: http://arxiv.org/abs/1102.5595v2
