Team

My current research focuses on understanding the electronic structure and band-topology of compensated magnets using a combination of density functional theory and symmetry analysis. I am particularly interested in spin transport phenomena originating from compensated magnetic orderings.

Publications:

Physical Review Letters:

• Pari, Nayra A. Álvarez, Daniel Julio Garcia, and Pablo S. Cornaglia. "Quasiparticle mass enhancement as a measure of entanglement in the Kondo problem." Physical Review Letters125.21 (2020): 217601

Research interests:

• Strongly correlated electron systems, quantum entanglement.
• Topological phases of matter, such as Dirac semimetals, Topological insulators.
• First principle calculations, DFT, and post-processing.

Antiferromagnets (AFMs) possess characteristics that make them ideal for spintronic applications: intrinsically, AFM dynamics are much faster compared to FM, AFMs are insensitive to external fields due to their zero net magnetization and produce no stray fields. However, FMs can be manipulated more efficiently. Thus combining AFMs and FMs into hybrid devices to exploit the manipulability of FMs together with the speed of AFMs is a desirable goal. Today, such hybrid devices are widely used, with AFMs having a passive role.

My research is directed to investigate whether AFMs can also be used as active parts in hybrid devices. I am interested in both the static domain wall configurations and domain wall dynamics originating from the combination of an AFM with a FM layer. While using analytical methods to understand the physics and link phenomenology to microscopic theories, I utilize atomistic simulations from ab initio constants and micromagnetic simulations to model larger and more realistic systems that can be compared to experimental data. In a collaboration with the group of Prof. Dr. Nowak at the University of Konstanz I co-develop atomistic spin dynamics simulations. I enjoy working in an interdisciplinary environment in close collaboration with colleagues from both theoretical and experimental physics. On a broader scale I am also interested in scientific applications of machine learning and artificial intelligence.

Research Interests:

 

 

The field of spintronics aims at writing and reading information form materials as we have them in memory drives. Conventionally ferromagnets (FMs) have been used as the materials in devices but they are reaching their limits in size speed and stability. Thus, other materials such as antiferromagnets (AFMs) and the newlly established altermagnets (ALMs) are investigated as a possible substitute.

Both classes show strong coupling between magnetic and elastic degrees of freedom for a variety of materials within. Such coupling allows to manipulate magnetic properties as anisotropy or the magnetic domains of the crystal with strains. Therefore, it is essential to understand the magnetoelastic interactions  to understand and control the behaviour of AFMs and ALMs.

My research is directed to the incluence of the magnetoelastic interaction in AFMs and ALMs from various aspects. I am interested in a range from microscopic phenomena as electronic structure, transport or topology of such crystals under strain as well as macroscopic domain formation and control in the presence of strain gradiets. For this I combine group theory with ab-initio calculations and perform analytics with phenomenological micromagnetic models.

 

Publications

Domain-wall orientation in antiferromagnets controlled by magnetoelastic effects (Preprint)

 

Master Thesis

Antiferromagnetic domains in the presence of magneoelastic interactions

 

Bachelor Thesis

Modelling of the magnetic states and phase transitions in Hematite