نتایج جستجو برای: insulating r
تعداد نتایج: 454968 فیلتر نتایج به سال:
We consider insulating phases of cold spin-1 bosonic particles with antiferromagnetic interactions, such as Na, in optical lattices. We show that spin-exchange interactions give rise to several distinct phases, which differ in their spin correlations. In twoand three-dimensional lattices, insulating phases with an odd number of particles per site are always nematic. For insulating states with a...
A paradigmatic case of multi-band Mott physics including spin-orbit and Hund's coupling is realized in Ca2RuO4. Progress in understanding the nature of this Mott insulating phase has been impeded by the lack of knowledge about the low-energy electronic structure. Here we provide-using angle-resolved photoemission electron spectroscopy-the band structure of the paramagnetic insulating phase of C...
Vortex lattice dynamics has been studied in thin Nb superconducting films sputtered on top of a dense triangular array of V dots with and without an intermediate SiO2 insulating layer. While the insulating layer modifies only slightly the Nb film corrugation, it reduces superconducting commensurability effects (CE) substantially. This implies that superconducting commensurability is dominated b...
Infrared study has been made on the filled skutterudites PrRu4P12 and SmRu4P12; which undergo a metal–insulator (M–I) transition at TMI 1⁄4 60 and 16 K; respectively. The opening of a charge gap for the two compounds are clearly observed below TMI: For PrRu4P12; new phonon peaks are also observed below TMI; which suggests that the crystal symmetry is lowered. On the other hand, no additional pe...
Two types of damping are commonly applied to describe ferromagnets at the macroscopic level: one by Landau and Lifshitz, and the other by Gilbert. This work successively applies the methods of irreversible thermodynamics to insulators, insulating paramagnets, and uniform insulating ferromagnets, in the last case uniquely obtaining Landau-Lifshitz damping. These methods are then applied to non-u...
We studied the insulator-metal transition (IMT) in single-domain, single crystalline vanadium dioxide (VO(2)) microbeams with infrared microspectroscopy. The unique nature of such samples allowed us to probe the intrinsic behavior of both insulating and metallic phases in the close vicinity of IMT, and investigate the IMT driven by either strain or temperature independently. We found that the V...
Using optical, TEM, and ultrafast electron diffraction experiments we find that single crystal VO(2) microbeams gently placed on insulating substrates or metal grids exhibit different behaviors, with structural and metal-insulator transitions occurring at the same temperature for insulating substrates, while for metal substrates a new monoclinic metal phase lies between the insulating monoclini...
Vanadium dioxide (VO2) has emerged as a promising micro-actuator material for its large amplitude and high work density across the transition between insulating (M1 M2) metallic (R) phase. Even though M2–R offers about 70% higher transformation stress than M1–R structural phase transition, application of M2 in micro-actuators is hindered by fact that previously, can only stay stable under tensi...
We consider the thermal insulation property of homogeneous anisotropically heat-conducting bodies, i.e. those whose thermal tensor (matrix) A is constant throughout the body but not generally a constant times the identity. This anisotropy is a common feature of nanocomposite materials. We propose using the principal Dirichlet eigenvalue λ of the associated elliptic differential operator −∇ · A∇...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید