A5007616902- Rare-earth and actinide compounds
- Quantum and electron transport phenomena
- Theoretical and Computational Physics
- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Quantum many-body systems
- Advanced materials and composites
- Quantum Mechanics and Applications
- Advanced Materials Characterization Techniques
- Magnetic Properties of Alloys
- Nuclear Materials and Properties
- Inorganic Chemistry and Materials
- MXene and MAX Phase Materials
- Radioactive element chemistry and processing
- Iron-based superconductors research
- Spectral Theory in Mathematical Physics
- Advanced Thermodynamics and Statistical Mechanics
Savannah River National Laboratory
2023-2024
University of Missouri
2021-2023
Abstract We present computer simulations on a class of percolative systems that forms new universality class. determine the universal critical exponents for this from lattices consisting up to one billion sites. These differ standard in once cluster breaks off lattice spanning cluster, its sites become protected and cannot be removed. demonstrate despite restriction evolution isolated clusters, scaling relationships between remain valid. Protected percolation closely mimics situation...
Systems that have been prepared to undergo a second-order phase transition at zero Kelvin, the so-called quantum critical systems, appear fall into two categories: (chemically) heavily doped systems where unusual properties can be related disorder-induced distribution of Kondo shielding temperatures, and (almost) stoichiometric departures from Fermi-liquid theory attributed intrinsic instabilities. Here we show this distinction is not as clear-cut magnetic clusters associated with...
Metallic Kondo Lattice systems that have been prepared to exhibit a competition between ordering of magnetic moments and shielding those by the conduction electrons down absolute zero display unusual low-temperature responses. Here we show dominant response such is caused two quantum effects: zero-point motion ions, size system restricting allowed wavelengths fluctuations. This ions induces broad distribution in temperatures renders assumption uniform heavy-fermion ground state untenable....
We present the results of computer simulations on a class percolative systems, called protected percolation, that violates Harris criterion. The criterion states whether critical behavior at phase transition from disordered state to an ordered will be altered by impurities. incorporate impurities into our test exponents for percolation are find three-dimensional indeed change with in form missing sites and immortal sites. On other hand, both standard two dimensions stable against
Metallic Kondo Lattice systems that have been prepared to exhibit a competition between ordering of magnetic moments and shielding those by the conduction electrons down absolute zero display unusual low-temperature responses. Here we show dominant response such is caused two quantum effects: zero-point motion ions, size system restricting allowed wavelengths fluctuations. This ions induces broad distribution in temperatures renders assumption uniform heavy-fermion ground state untenable....