A5058487944- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Topological Materials and Phenomena
- Personal Information Management and User Behavior
- Graphene research and applications
- Machine Learning in Materials Science
- Multiferroics and related materials
- Atomic and Subatomic Physics Research
- Magnetic properties of thin films
- Quantum and electron transport phenomena
- Theoretical and Computational Physics
Georgia Institute of Technology
2022-2024
In spin-$\frac{1}{2}$ Mott insulators, nonmagnetic quantum liquid phases are often argued to arise when the system shows no magnetic ordering, but identifying positive signatures of these or related spinon quasiparticles can be elusive. Here, we use Raman scattering provide three for spinons in a possible spin-orbit material $\mathrm{Ba}{}_{4}\mathrm{Ir}{}_{3}\mathrm{O}{}_{10}$: (1) broad hump, which show from Luttinger with parallel photon polarizations normal one-dimensional chains; (2)...
Crystal defects can highlight interesting quantum features by coupling to the low-energy Hamiltonian $H$. Here we show that independently of this $H$ coupling, topological crystalline generate new directly modifying response theory electric-field probes such as Raman scattering. To consider an antiferromagnetic spin-1/2 model ${H}_{\mathrm{spin}}$ on a zigzag chain. Crystalline domain walls between two domains appear at most local in but (not locally creatable) operator $R$ inelastic photon...
Lattice defects have interesting effects in some quantum Hamiltonians. Here we show how topological crystalline can produce qualitatively new by coupling to electric field probes such as Raman scattering, even when they do not appear the low-energy Hamiltonian but rather only probe response theory. To this consider an antiferromagnetic spin-1/2 model $H_{spin}$ on a zigzag chain. Crystalline domain walls between two domains at most local $H_{spin}$, (not locally creatable) operator $R$ of...
Colossal magnetoresistance (CMR) is an extraordinary enhancement of the electric conductivity in presence a magnetic field. It conventionally associated with field-induced spin polarization, which drastically reduces scattering and thus resistance. However, ferrimagnetic Mn3Si2Te6 intriguing exception to this rule: it exhibits 7-order-of-magnitude reduction ab-plane resistivity 13-Tesla anisotropy field occur only when polarization avoided [1]. Here we report exotic quantum state that driven...