Low-dimensional quantum magnetism in Cu(NCS)2 : A molecular framework material

Quantum Theory of Molecular Magnetism

Disorder and Magnetism in Two Dimensional Quantum Systems

Declaration This thesis is a presentation of my original research work. Wherever contributions of others are involved, every effort is made to indicate this clearly, with due reference to the literature, and acknowledgement of collaborative research and discussions. In my capacity as the supervisor of the candidate's thesis, I certify that the above statements are true to the best of my knowled...

Quantum magnetism in strongly interacting one-dimensional spinor Bose systems

Strongly interacting one-dimensional quantum systems often behave in a manner that is distinctly different from their higher-dimensional counterparts. When a particle attempts to move in a one-dimensional environment it will unavoidably have to interact and 'push' other particles in order to execute a pattern of motion, irrespective of whether the particles are fermions or bosons. A present fro...

Dipolar Magnetism in Ordered and Disordered Low-Dimensional Nanoparticle Assemblies

Magnetostatic (dipolar) interactions between nanoparticles promise to open new ways to design nanocrystalline magnetic materials and devices if the collective magnetic properties can be controlled at the nanoparticle level. Magnetic dipolar interactions are sufficiently strong to sustain magnetic order at ambient temperature in assemblies of closely-spaced nanoparticles with magnetic moments of...

Computational Probes of Collective Excitations in Low-dimensional Magnetism

The investigation of the dynamics of quantum many-body systems is a concerted eeort involving computational studies of mathematical models and experimental studies of material samples. Some commonalities of the two tracks of investigation are discussed in the context of the quantum spin dynamics of low-dimensional magnetic systems, in particular spin chains. The study of quantum uctuations in s...