4 papers
Bose-Glass Phases in Disordered Quantum Magnets
Omid Nohadani, Stefan Wessel, Stephan Haas
In disordered spin systems with antiferromagnetic Heisenberg exchange, transitions into and out of a magnetic-field-induced ordered phase pass through a unique regime. Using quantu…
Quantum Phase Transitions in Coupled Dimer Compounds
Omid Nohadani, Stefan Wessel, Stephan Haas
We study the critical properties in cubic systems of antiferromagnetically coupled spin dimers near magnetic-field induced quantum phase transitions. The quantum critical points in…
Universal scaling at field-induced magnetic phase transitions
Omid Nohadani, Stefan Wessel, Bruce Normand +1
We study field-induced magnetic order in cubic lattices of dimers with antiferromagnetic Heisenberg interactions. The thermal critical exponents at the quantum phase transition fro…
Adaptive design of nano-scale dielectric structures for photonics
Yu Chen, Rong Yu, Weifei Li +3
Using adaptive algorithms, the design of nano-scale dielectric structures for photonic applications is explored. Widths of dielectric layers in a linear array are adjusted to match…