Department
Physics
Major
Physics
Research Advisor
Vojta, Thomas
Advisor's Department
Physics
Funding Source
Dr. Vojta's Curators' Professors Funds
Abstract
Many quantum materials feature low-temperature phases that break realspace symmetries in addition to spin or charge symmetries. Examples include stripe phases in cuprate superconductors, nematic phases in iron pnictides, and spin-density waves in magnetic materials. Realistic materials always contain some quenched disorder or randomness. To understand the effect of disorder on phases that break real-space symmetries, we investigate the influence of spinless impurities on a frustrated 3-dimensional J 1-J2 Ising model through Monte Carlo simulations. Spin less impurities generate random field type disorder for the spin-density wave (stripe) phase in this system. Whereas the long-range stripe order is destroyed by the random fields in two dimensions, preliminary research shows that this is not the case in three dimensions. Preliminary research also shows that the first order phase transition of the undiluted 3- dimensional J1-J2 Ising model becomes second order by the addition of spinless impurities.
Biography
James Elverson is a second-year physics major in Dr. Vojta's research group and is interested in the subject of condensed matter. He has been working with a 3-dimensional model of a diluted frustrated magnet since joining the group his freshman year.
Research Category
Sciences
Presentation Type
Poster Presentation
Document Type
Poster
Location
Innovation Forum - 1st Floor Innovation Lab
Presentation Date
10 April 2024, 9:00 am - 12:00 pm
Stripe order, impurities, and symmetry breaking in a 3-dimensional model of a diluted frustrated magnet
Innovation Forum - 1st Floor Innovation Lab
Many quantum materials feature low-temperature phases that break realspace symmetries in addition to spin or charge symmetries. Examples include stripe phases in cuprate superconductors, nematic phases in iron pnictides, and spin-density waves in magnetic materials. Realistic materials always contain some quenched disorder or randomness. To understand the effect of disorder on phases that break real-space symmetries, we investigate the influence of spinless impurities on a frustrated 3-dimensional J 1-J2 Ising model through Monte Carlo simulations. Spin less impurities generate random field type disorder for the spin-density wave (stripe) phase in this system. Whereas the long-range stripe order is destroyed by the random fields in two dimensions, preliminary research shows that this is not the case in three dimensions. Preliminary research also shows that the first order phase transition of the undiluted 3- dimensional J1-J2 Ising model becomes second order by the addition of spinless impurities.
