Theory of static and dynamic antiferromagnetic vortices in LSCO superconductors
... When the bottom of the vortex band energy touches zero, the static AFVS is obtained. With this basic preparation we can now discuss the experimental situation in the optimally doped LSCO superconductors, and present the central argument of this paper that the field induced scattering originates from ...
... When the bottom of the vortex band energy touches zero, the static AFVS is obtained. With this basic preparation we can now discuss the experimental situation in the optimally doped LSCO superconductors, and present the central argument of this paper that the field induced scattering originates from ...
structure determination from powder diffraction data–challenging
... of the circuit) and are absorbed by the transition metal oxide or phosphate framework. The transition metal is being reduced decreasing its oxidation state. When the battery is charged, all processes are reversed; the electrons, the Li ions, and the current flow in the opposite direction and transit ...
... of the circuit) and are absorbed by the transition metal oxide or phosphate framework. The transition metal is being reduced decreasing its oxidation state. When the battery is charged, all processes are reversed; the electrons, the Li ions, and the current flow in the opposite direction and transit ...
PDF only - at www.arxiv.org.
... a finite polarization below 13 K, while Kimura et al observe a ferroelectric order only between 5 K and 8 K, at low magnetic fields.16,20 The applied magnetic field seems to stabilize a commensurate magnetic structure below 15 K, with a modulation vector = 1/4.17 Some years ago, Ivanov et al have ...
... a finite polarization below 13 K, while Kimura et al observe a ferroelectric order only between 5 K and 8 K, at low magnetic fields.16,20 The applied magnetic field seems to stabilize a commensurate magnetic structure below 15 K, with a modulation vector = 1/4.17 Some years ago, Ivanov et al have ...
1 The Paramagnet to Ferromagnet Phase Transition
... The magnetic spins of a magnetic material, e.g., nickel, interact with each other: the energy is lower if the two spins on adjacent nickel atoms are parallel than if they are antiparallel. This lower energy tends to cause the spins to be parallel and below a temperature called the Curie temperature, ...
... The magnetic spins of a magnetic material, e.g., nickel, interact with each other: the energy is lower if the two spins on adjacent nickel atoms are parallel than if they are antiparallel. This lower energy tends to cause the spins to be parallel and below a temperature called the Curie temperature, ...
Dilute Magnetic Semiconductor Solid Solutions of Zinc Cobalt
... between 0-4 eV. This can be observed graphically in figure 5. At absolute zero semiconductors behave as insulators, but as temperature rises, electrons are promoted from the valence band to the conduction band, resulting in conductivity. This happens because the Fermi (Ef) level exists just above t ...
... between 0-4 eV. This can be observed graphically in figure 5. At absolute zero semiconductors behave as insulators, but as temperature rises, electrons are promoted from the valence band to the conduction band, resulting in conductivity. This happens because the Fermi (Ef) level exists just above t ...
University of Groningen Organic-inorganic hybrids Arkenbout
... perovskite layers have a net charge of -2 per formula unit, which is compensated by positively charged RNH3+ ions that are present between the inorganic layers. The R group can vary from a hydrogen atom to larger organic molecules such as phenylethyl or alkane chains up to n=14 (longer chains do har ...
... perovskite layers have a net charge of -2 per formula unit, which is compensated by positively charged RNH3+ ions that are present between the inorganic layers. The R group can vary from a hydrogen atom to larger organic molecules such as phenylethyl or alkane chains up to n=14 (longer chains do har ...
Nitrogen-rich transition metal nitrides
... overall water splitting with good hydrolytic stability using this material [14]. Further work has examined potential improvements in its photocatalytic activity by high pressure ammonia treatment [71] or sodium doping [72], as well as its use to generate electrical currents in photoelectrochemical c ...
... overall water splitting with good hydrolytic stability using this material [14]. Further work has examined potential improvements in its photocatalytic activity by high pressure ammonia treatment [71] or sodium doping [72], as well as its use to generate electrical currents in photoelectrochemical c ...
Abstract poster Presentation
... discovery, different groups have reported interatomic distance between suspended Au atoms [1] has that are much longer that in bulk gold. The observation of these long interatomic distances have been attributed to the existence of an impurity atom or molecule [2] inserted between two gold atoms, whi ...
... discovery, different groups have reported interatomic distance between suspended Au atoms [1] has that are much longer that in bulk gold. The observation of these long interatomic distances have been attributed to the existence of an impurity atom or molecule [2] inserted between two gold atoms, whi ...
Colloidal synthesis of metal oxide nanocrystals and thin films Fredrik Söderlind
... properties of materials are to some extent size-dependent, implying that for very small crystals these properties may be different from those encountered in the bulk [2]. Hence, nanocrystals might exhibit properties characteristic of both the atomic and bulk states. The Royal Society [3] has propose ...
... properties of materials are to some extent size-dependent, implying that for very small crystals these properties may be different from those encountered in the bulk [2]. Hence, nanocrystals might exhibit properties characteristic of both the atomic and bulk states. The Royal Society [3] has propose ...
Title Simulation of a tubular linear magnetic gear using HTS bulks
... bulks, the amplitude of air-gap flux density can be improved greatly. By using spectrum analysis, it can also be found that the 6th and 15th harmonic components improve dramatically by using the HTS bulks. The largest asynchronous space harmonic which has 15 pole-pairs interacts with the 15 pole-pai ...
... bulks, the amplitude of air-gap flux density can be improved greatly. By using spectrum analysis, it can also be found that the 6th and 15th harmonic components improve dramatically by using the HTS bulks. The largest asynchronous space harmonic which has 15 pole-pairs interacts with the 15 pole-pai ...
Crystal Structure Tutorial
... crystal (a single molecule of iron in the solid state) has the chemical formula Fe(s). This does neither means nor implies that a single molecule of iron in the solid state has only one atom. The same is true for materials such as table salt, sodium chloride. The formula is NaCl(s), this means that ...
... crystal (a single molecule of iron in the solid state) has the chemical formula Fe(s). This does neither means nor implies that a single molecule of iron in the solid state has only one atom. The same is true for materials such as table salt, sodium chloride. The formula is NaCl(s), this means that ...
Crystallization of charge holes in the spin ladder of Sr14Cu24O41
... with superconductivity in high-transition-temperature (highT c) superconductors is one of the deepest problems in condensed matter physics. One candidate is the ‘stripe’ phase1–3, in which the charge carriers (holes) condense into rivers of charge that separate regions of antiferromagnetism. A relat ...
... with superconductivity in high-transition-temperature (highT c) superconductors is one of the deepest problems in condensed matter physics. One candidate is the ‘stripe’ phase1–3, in which the charge carriers (holes) condense into rivers of charge that separate regions of antiferromagnetism. A relat ...
Josephson Effect and Selected Applications: an Example
... of stationary state. We have already said that knowing the state of a quantum system S is equivalent to knowing all of S. For a stationary state, a knowledge of the state |kH> of S includes the energy Ek of the state. If the allowed energies of the system were pairwise well separated, this requireme ...
... of stationary state. We have already said that knowing the state of a quantum system S is equivalent to knowing all of S. For a stationary state, a knowledge of the state |kH> of S includes the energy Ek of the state. If the allowed energies of the system were pairwise well separated, this requireme ...
Magnetic order of intermetallic FeGa $ _ {3
... of itinerant magnetism, of local magnetic moments or of a combination of both. The itinerant view is supported by the small saturated moment and corresponding large Rhodes-Wohlfarth ratio11,12 . DFT calculations in a weakly correlated picture find that itinerant magnetism in FeGa3 can be obtained by ...
... of itinerant magnetism, of local magnetic moments or of a combination of both. The itinerant view is supported by the small saturated moment and corresponding large Rhodes-Wohlfarth ratio11,12 . DFT calculations in a weakly correlated picture find that itinerant magnetism in FeGa3 can be obtained by ...
Crystallization dynamics and interface stability of strontium titanate
... analysis was performed with X-ray photoelectron spectroscopy (XPS) on a Thermo Fisher Scientific Escalab 250Xi. High-resolution transmission electron microscopy (HRTEM) was carried out using a 200 kV analytical high-resolution transmission electron microscope (JEOL JEM 2200 FS) equipped with an in-c ...
... analysis was performed with X-ray photoelectron spectroscopy (XPS) on a Thermo Fisher Scientific Escalab 250Xi. High-resolution transmission electron microscopy (HRTEM) was carried out using a 200 kV analytical high-resolution transmission electron microscope (JEOL JEM 2200 FS) equipped with an in-c ...
High-temperature superconductivity
High-temperature superconductors (abbreviated high-Tc or HTS) are materials that behave as superconductors at unusually high temperatures. The first high-Tc superconductor was discovered in 1986 by IBM researchers Georg Bednorz and K. Alex Müller, who were awarded the 1987 Nobel Prize in Physics ""for their important break-through in the discovery of superconductivity in ceramic materials"".Whereas ""ordinary"" or metallic superconductors usually have transition temperatures (temperatures below which they superconduct) below 30 K (−243.2 °C), and must be cooled using liquid helium in order to achieve superconductivity, HTS have been observed with transition temperatures as high as 138 K (−135 °C), and can be cooled to superconductivity using liquid nitrogen. Until 2008, only certain compounds of copper and oxygen (so-called ""cuprates"") were believed to have HTS properties, and the term high-temperature superconductor was used interchangeably with cuprate superconductor for compounds such as bismuth strontium calcium copper oxide (BSCCO) and yttrium barium copper oxide (YBCO). However, several iron-based compounds (the iron pnictides) are now known to be superconducting at high temperatures.For an explanation about Tc (the critical temperature for superconductivity), see Superconductivity § Superconducting phase transition and the second bullet item of BCS theory § Successes of the BCS theory.