Although the advantages of online δ(18)O analysis of organic compounds make its broad application desirable, researchers have encountered NO(+) isobaric interference with CO(+) at m/z 30 (e.g. (14)N(16)O(+), (12)C(18)O(+)) when analyzing nitrogenous substrates. If the δ(18)O value of inter-laboratory standards for substrates with high N:O value could be confirmed offline, these materials could ...

Strässle, S; Khasanov, R; Kondo, T; Heron, D O G; Kaminski, A; Keller, H; Lee, S L; Takeuchi, T Strässle, S; Khasanov, R; Kondo, T; Heron, D O G; Kaminski, A; Keller, H; Lee, S L; Takeuchi, T (2009). Superfluid density and angular dependence of the energy gap in optimally doped (BiPb)2(SrLa)2CuO6+ δ. Journal of Superconductivity and Novel Magnetism, 22(2):189-193. Postprint available at: http:/...

The in-plane normal-state resistivity of Zn-doped YBa2Cu3O7−δ and heavily underdoped pure YBCO single crystals is measured down to low temperatures under magnetic fields up to 18 T. We found that the temperature dependence of the normal-state ρab does not obey log(1/T ) and tends not to diverge in the low temperature limit. The result suggests that the “ground state” of the normal state of YBCO...

A GaN-based heterostructure barrier diode (HBD) similar to GaAs planar-doped barrier diodes is demonstrated. Instead of doping with impurities, the polarization-induced sheet charge at the III-nitride heterojunction behaves as an effective δ-doping. An AlGaN/GaN heterostructure is used for the demonstration. The rectifying characteristics of the polarizationinduced GaN HBDs can be tuned by cont...

We have grown high quality p-type δ-doped InAs quantum dots and have demonstrated coherent spin pumping and repumping of a hole spin in a positively charged quantum dot by means of a single-laser driving scheme under a high magnetic field in the Voigt configuration. Modeling of our system shows excellent qualitative agreement with the experimental findings and further explores the performance o...

We analyze doping dependent spectral intensities and Fermi surface maps obtained recently in Nd2−xCexCuO4±δ (NCCO) via high resolution ARPES measurements, and show that the behavior of this electron-doped compound can be understood as the closing of a Mott (pseudo) gap, leading to a quantum critical point just above optimal doping. The doping dependence of the effective Hubbard U adduced by com...

Phase-sensitive tests of pairing symmetry have provided strong evidence for predominantly d-wave pairing symmetry in both the holeand electron-doped high-Tc cuprate superconductors. Temperature dependent measurements in YBa2Cu3O7−δ (YBCO) indicate that the d-wave pairing dominates, with little if any imaginary component, at all temperatures from 0.5K through Tc. In this article we review some o...

Abstract Superconductivity transition temperature (Tc) marks the inception of a macroscopic quantum phase-coherent paired state in fermionic systems. For two-dimension superconductivity, electrons condense into coherent superfluid at Tc, which is usually lower than pairing temperature, between intrinsic physics including Berezinskii-Kosterlitz-Thouless and pseudogap are hotly debated. In case m...

Ruddlesden–Popper type electrodes with composition La2CuO4−δ are alternative cathode materials for solid oxide fuel cells (SOFCs); however, the undoped compound exhibits low electrical conductivity potential applications, which is usually increased by alkaline-earth doping. A promising to doping modification of anionic framework halogen In this study, La2CuO4−0.5xAx (A = F, Cl, Br; x 0–0.3) com...