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MagicAngleSpinning Nuclear Magnetic Resonance
"... This thesis concerns the development of radiofrequency pulse sequences in magicanglespinning solidstate nuclear magnetic resonance. First, two classes of pulse sequences are presented which are synchronized with the sample rotation. Symmetry theorems are described which link the symmetry of the ..."
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of the pulse sequences to selection rules for the recoupling and/or decoupling of certain spin interactions. Pulse sequences are demonstrated which recouple direct homonuclear dipolar interactions at high sample spinning frequencies. Several applications are shown, including the ecient excitation of double
Toroidal Dipolar Response in
"... Toroidal multipoles are fundamental electromagnetic excitations different from those associated with the familiar charge and magnetic multipoles. They have been held responsible for parity violation in nuclear and particle physics, but direct evidence of their existence in classical electrodynamics ..."
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Toroidal multipoles are fundamental electromagnetic excitations different from those associated with the familiar charge and magnetic multipoles. They have been held responsible for parity violation in nuclear and particle physics, but direct evidence of their existence in classical electrodynamics
Zero Sound in Dipolar Fermi Gases
"... We study the propagation of sound in a homogeneous dipolar gas at zero temperature, known as zero sound. We find that below a critical dipolar interaction, undamped sound propagation is possible only in a range of solid angles around the direction of polarization of the dipoles. For larger interacti ..."
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We study the propagation of sound in a homogeneous dipolar gas at zero temperature, known as zero sound. We find that below a critical dipolar interaction, undamped sound propagation is possible only in a range of solid angles around the direction of polarization of the dipoles. For larger
DIPOLAR INTERACTION IN 2D HONEYCOMB MAGNETS
"... The classical ground state of a system of dipoles arranged on a 2D honeycomb lattice is rigorously shown to be a (1/3, −1/3) structure. This configuration exhibits a continuous degeneracy with respect to rotations of the two hexagonal sublattices in opposite directions. These results are in agreemen ..."
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are in agreement with observations on ErBr3, suggesting that dipolar interactions are dominant in the latter compound. Frustrated magnetic systems are characterized by the fact that the classical ground state is unable to satisfy the interactions on all bonds simultaneously. Frustration can be caused by a special
Homonuclear NMR Correlations between HalfInteger Quadrupolar Nuclei Undergoing MagicAngle Spinning
, 2003
"... This study presents a theoretical, numerical, and experimental survey on the nature of homonuclear dipolar couplings in systems of halfinteger quadrupolar nuclei undergoing magicanglespinning (MAS). Various spin interactions that do not commute with homonuclear dipolar couplings (chemical shift e ..."
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Cited by 1 (0 self)
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This study presents a theoretical, numerical, and experimental survey on the nature of homonuclear dipolar couplings in systems of halfinteger quadrupolar nuclei undergoing magicanglespinning (MAS). Various spin interactions that do not commute with homonuclear dipolar couplings (chemical shift
Theory and simulation of central force model potentials: Application to homonuclear diatomic molecules
"... Structure and thermodynamics of fluids made of particles that interact via a central force model potential are studied by means of Monte Carlo simulations and integral equation theories. The Hamiltonian has two terms, an intramolecular component represented by a harmonic oscillatorlike potential an ..."
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Structure and thermodynamics of fluids made of particles that interact via a central force model potential are studied by means of Monte Carlo simulations and integral equation theories. The Hamiltonian has two terms, an intramolecular component represented by a harmonic oscillatorlike potential
Bulk and Surface Properties of Dipolar Fluids
, 2008
"... Based on densityfunctional theory we analyze the full phase diagram, the occurrence of longranged orientational order, and the structural properties of dipolar fluids. As a model system we consider the Stockmayer fluid that consists of spherical particles interacting via a LennardJones potential ..."
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Based on densityfunctional theory we analyze the full phase diagram, the occurrence of longranged orientational order, and the structural properties of dipolar fluids. As a model system we consider the Stockmayer fluid that consists of spherical particles interacting via a LennardJones potential
Supramolecular Magnetic Brushes: The Impact of Dipolar Interactions on the Equilibrium Structure
"... ABSTRACT: The equilibrium structure of supramolecular magnetic filament brushes is analyzed at two different scales. First, we study the density and height distributions for brushes with various grafting densities and chain lengths. We use Langevin dynamics simulations with a bead−spring model that ..."
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, in contrast to nonmagnetic brushes, in which the internal structure is determined by random density fluctuations, magnetic forces introduce a certain order in the system. Because of their highly directional nature, magnetic dipolar interactions prevent some of the random connections to be formed. On the other
Spin Diffusion in 2D XY Ferromagnet with Dipolar Interaction
, 2008
"... In the ordered phase of 2D XY ferromagnet the dipole force induce a strong interaction between spinwaves in the long wavelength limit. This interaction leads to the transformation of the spinwave excitation into a new softmode excitation in an intermediate range of wavelengths limited in magnitud ..."
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In the ordered phase of 2D XY ferromagnet the dipole force induce a strong interaction between spinwaves in the long wavelength limit. This interaction leads to the transformation of the spinwave excitation into a new softmode excitation in an intermediate range of wavelengths limited
GrossPitaevskiiPoisson equations for dipolar BoseEinstein condensate with anisotropic confinement
 SIAM J. Math. Anal
"... Abstract. Ground states and dynamical properties of a dipolar Bose–Einstein condensate are analyzed based on the Gross–Pitaevskii–Poisson system (GPPS) and its dimension reduction models under an anisotropic confining potential. We begin with the threedimensional (3D) GPPS and review its quasitwo ..."
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Cited by 11 (9 self)
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up in two dimensions are analyzed. Finally, we rigorously prove the convergence with linear convergence rate for the solutions of the 3D GPPS and its quasi2D and quasi1D approximate equations in the weak interaction regime. Key words. Gross–Pitaevskii–Poisson system, dipolar Bose–Einstein condensate
Results 1  10
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130