0000000000420200

AUTHOR

Dragan Mihailovic

showing 4 related works from this author

Laser-driven quantum magnonics and terahertz dynamics of the order parameter in antiferromagnets

2017

The impulsive generation of two-magnon modes in antiferromagnets by femtosecond optical pulses, so-called femto-nanomagnons, leads to coherent longitudinal oscillations of the antiferromagnetic order parameter that cannot be described by a thermodynamic Landau-Lifshitz approach. We argue that this dynamics is triggered as a result of a laser-induced modification of the exchange interaction. In order to describe the oscillations we have formulated a quantum mechanical description in terms of magnon pair operators and coherent states. Such an approach allowed us to} derive an effective macroscopic equation of motion for the temporal evolution of the antiferromagnetic order parameter. An impli…

PhysicsMagnonicsStrongly Correlated Electrons (cond-mat.str-el)Condensed Matter - Mesoscale and Nanoscale PhysicsTerahertz radiationMagnonEquations of motionFOS: Physical sciencesPhysics::Optics02 engineering and technologyQuantum entanglement021001 nanoscience & nanotechnology01 natural sciences3. Good healthCondensed Matter - Strongly Correlated ElectronsQuantum mechanicsPicosecondSpectroscopy of Solids and Interfaces0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Condensed Matter::Strongly Correlated Electrons010306 general physics0210 nano-technologyQuantumSpin-½
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Magnetic properties of MoS 2 nanotubes doped with lithium

2003

DC magnetization measurements of lithium-doped molybdenum sulfide nanotubes (LixMoS2, 2.2 10 kOe, the nonlinear part in H<5 kOe with saturation at approximately 10 kOe can be observed. This suggests a formation of ferromagnetic clusters even at room temperature. No magnetic phase transition between 2 and 300 K has been detected.

Inorganic ChemistryMagnetizationMolybdenum sulfideFerromagnetismCondensed matter physicsChemistryDopingMaterials ChemistryMagnetic phase transitionPhysical and Theoretical ChemistrySaturation (magnetic)Polyhedron
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Unusual Magnetic State in Lithium-DopedMoS2Nanotubes

2003

We report on the very peculiar magnetic properties of an ensemble of very weakly coupled lithium-doped MoS2 nanotubes. The magnetic susceptibility chi of the system is nearly 3 orders of magnitude greater than in typical Pauli metals, yet there is no evidence for any instability which would alleviate this highly frustrated state. Instead, the material exhibits peculiar paramagnetic stability down to very low temperatures, with no evidence of a quantum critical point as T-->0 in spite of clear evidence for strongly correlated electron behavior. The exceptionally weak intertube interactions appear to lead to a realization of a near-ideal one-dimensional state in which fluctuations prevent the…

Materials scienceCondensed matter physicsOrders of magnitude (temperature)General Physics and Astronomychemistry.chemical_elementElectronInstabilityMagnetic susceptibilitysymbols.namesakeParamagnetismPauli exclusion principlechemistryQuantum critical pointsymbolsLithiumPhysical Review Letters
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Two-terminal nanoelectromechanical bistable switches based on molybdenum–sulfur–iodine molecular wire bundles

2010

We demonstrate the application of Mo(6)S(3)I(6) molecular wire bundles for electrically controllable two-terminal on-off switches. We investigate how changes in the contact electrode material and geometry influence the device characteristics, hysteretic switching behavior and device stability. We also determine the device operating parameters, particularly the Young's moduli (40-270 GPa), operating current densities (3.2 x 10(5)-7 x 10(6) A m(-2)) and force constants. Although qualitatively, the properties of Mo(6)S(3)I(6) nanowires in nanoelectromechanical (NEM) switches are similar to those of carbon nanotubes (CNTs), their lower friction coefficient, higher mechanical stability and highe…

Materials scienceBistabilitybusiness.industryMechanical EngineeringNanowirechemistry.chemical_elementBioengineeringNanotechnologyGeneral ChemistryCarbon nanotubeSulfurlaw.inventionMolecular wirechemistryTerminal (electronics)Mechanics of MaterialslawMolybdenumOptoelectronicsGeneral Materials ScienceElectrical and Electronic EngineeringbusinessVoltageNanotechnology
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