Materials Literature
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We present experimental evidence of the formation of a "Pseudogap" state in a disordered conventional s-wave superconductor, NbN, as the system is driven towards the Anderson Metal-Insulator transition. Series of scanning tunnelling spectroscopy measurements done on films with increasing disorder shows that for strong…
We examine the anisotropy of optical conductivity above the Neel temperature in iron arsenides by mean-field calculation in a five-band Hubbard model. In order to represent the anisotropy, we artificially introduce the energy splitting between dzx and dyz. The calculated spectra are not enough to explain the anisotrop…
We performed the 75As nuclear magnetic resonance measurements of Ba1−xKxFe2As2 (BKFA) for x = 0.27, 0.39, 0.58, 0.64, 0.69 and 1 to understand gap structure in this system. Temperature dependence of spin lattice relaxation rate (1/T1) below superconducting (SC) transition temperature Tc changes gradually from x = 0.39…
The electronic structure of hollandite ruthenate K 2 Ru 8 O 16 is calculated using the generalized gradient approximation in the density functional theory, where the Hubbard-type repulsive interaction is taken into account. We find that the band structure near the Fermi level consists only of a single band, which is h…
We have measured the susceptibility and magnetization of PrxLa1-xInAg2 at Pr concentrations x=1 and 0.1 down to T ~ 0.5 K by SQUID magnetometer with a home-made 3He insert. The susceptibility above T = 15 K is well reproduced by the crystal-electric-field level scheme with a non-Kramers Γ3 doublet in the ground state…
A range of physical, chemical and combination techniques is used today for various antiseptic, disinfection and sterilization applications. The objective of this chapter is to explore new and emerging technologies in this area. Many physical (such as heat) and chemical (microbicides such as aldehydes, phenols and halo…
This chapter contains sections titled: Introduction The matrix Cellular phenotype in biofilm communities as a moderator of recalcitrance Biofilms as highly selective environments Conclusions Acknowledgments References
We present the results of study of heat capacity and electrical resistance of the (Pb y Sn 1-y ) 2 P 2 S 6 chalcogenides where Pb content varies from 0 till 0.8. We have studied the temperature behaviour of heat capacity from the point of Pb influence on change of transition temperature at the temperature region 50–40…
Scanning tunneling microscopy/spectroscopy (STM/STS) measurements on ?-(DDA)xTiNCl (DDA=H2N-(CH2)10-NH2, Tc=16 K) have been carried out. The STM topography exhibits simple rectangular shaped atomic lattice with the periods of |a|=0.38 nm and |b| =0.33 nm. The averaged dI / dV spectrum shows the gap value of ? ~ 9 meV,…
We investigate the effects of disorder in Fe x Ti(Se 1− y S y ) 2 single crystals. In M x TiSe 2 ( M = Fe, Co, and Ni), positive magnetoresistance proportional to magnetic field and power-law scaling of magnetization were observed. This observation has been attributed to disorder-induced distribution of Kondo temperat…
ABSTRACT Carbon‐core/TiO2‐sheath nanofibers have been fabricated by iodine‐vapor treatment and carbonization of poly (vinyl alcohol) (PVA)/TiO2 composite nanofibers that were prepared by sol‐gel coating of TiO2 on the electrospun PVA nanofibers. The carbon/TiO2 nanofibers had diameters of a few hundred nanometers and…
Artificial liner peptides that bind to the c face of hydroxyapatite (HA) were obtained by using the mRNA display method. The specific attachment to the c face was characterized with the adsorption isotherm of the peptides. The crystal growth of HA was found to be modulated by the particular peptides. The results of th…
Abstract The present study evaluates the effect of heat treatment on electrospun poly(lactide‐co‐glycolide) fibrous membranes. Both a temperature (75–150 °C) and a treatment time range (5–40 min) are tested. The effect on the fibrous structure is investigated in terms of morphology, showing that with increasing temper…
We briefly review the recent progress on the study of weakly correlated non-centrosymmetric (NCS) superconductors, with an emphasis on their novel pairing symmetry and the upper critical field arising from the absence of inversion symmetry. Measurements of penetration depth, specific heat, NMR, etc., have shown that n…
We have performed Co-NQR study to clarify the complex magnetic phases in approaching to the quantum critical point (QCP). The successive transitions at T N2 =12 K and T N3 =8 K after the ferrimagnetic-like order at T N1 =21 K in ambient pressure are confirmed by the spectral changes of Co-NQR However no critical slowi…
We have observed large magneto-resistance (MR) intensified by rapid thermal annealing (RTA) in magnetite (Fe 3 O 4 ) thin film (MTF) on SiO 2 glass (a-SiO 2 ) substrate. The MTF was produced by the RF magnetron sputtering method by using a magnetite target. The electrical resistivity (ER) of as-grown MTF (AG-MTF) show…
Magnetic excitation spectra χ" ( Q , Δ E ) have been measured for several Fe-pnictides including Ca-Fe-Pt-As system ( T c ∼30 K), one of new superconducting systems with FeAs planes. For the Ca-Fe-Pt-As system, data were taken with the neutron spectrometer 4SEASONS at J-PARC for a large crystal. The spectral weight χ"…
A bicrystal close to a rhombohedral twin orientation in α-alumina has been deformed by compression at high temperature. After deformation the twin contained a periodic array of intrinsic dislocations. This configuration is interpreted by the decomposition of incoming basal lattice dislocations into interfacial disconn…
The article disclosed the theory of the kinetics of excitons self-trapping in alkali halide crystals. On the example of KI and RbI crystals the time of excitons self-trapping and the length of free path before self-trapping were calculated. Also, the theory of self-trapping rate was revealed. According to the Arrheniu…
We performed electron spin resonance (ESR) on polycrystalline S = 3/2 compounds consisting of equilateral and non-equilateral triangular spin tubes in CsCrF 4 and α-KCrK 4 , respectively. In CsCrK 4 , a gapless spin-liquid ground state was realized at 1.5 K. Linewidth of the ESR spectra dramatically increased below 10…