Symmetry is a key to unlock exotic phenomena in condensed matter physics. Particularly in magnetic systems, the symmetry analysis enables deep understanding of magnetic ordering and electron transports. In this talk, I will give three examples showing how symmetry analysis can help understand and design magnetic materials of interest. First, I will show the prediction of giant perpendicular magnetic anisotropy (PMA) in iron monolayer on top of III-V nitride substrates. The magnitude of PMA is up to 50 meV, in contrast to 1meV in conventional Fe-based thin films.
Colloquium
Friday, April 17, 2020 - 3:10pm to 4:00pm
· Colloquium
Prof. Aleks Diamond-Stanic, Bates College
Friday, March 6, 2020 - 3:10pm to 4:00pm
· Colloquium
Prof. Ming Zhang, Florida Institute of Technology
Friday, October 18, 2019 - 3:10pm to 4:00pm
· Colloquium
Prof. Jiadong Zang, University of New Hampshire
Friday, September 13, 2019 - 3:10pm to 4:00pm
· Colloquium
Dr. Jun Lin, Yunnan Astronomical Observatories, CAS, China
Magnetic reconnection is a ubiquitous process in the universe involved in the release/conversion of the magnetic energy in the magnetized plasma. It takes place in a large-scale CME/flare current sheet in the major solar eruption, which forms as a result of the loss of equilibrium in the coronal magnetic configuration at the beginning of the eruption. The loss of the equilibrium in the coronal magnetic configuration occurs at the Alfven time-scale of the coronal, so does the current sheet connecting the CME to the associated flare.
Tuesday, July 16, 2019 - 1:00pm to 2:00pm
· Colloquium
Dr. Dacheng Lin
A star wandering too close to a massive black hole (BH) can be pulled apart by the black hole's intense tidal force.
Friday, April 26, 2019 - 3:10pm to 4:00pm
· Colloquium
Prof. Ben Hunt, Department of Physics, Carnegie Mellon University
The physics of superconductors in reduced dimensions — two in particular — is related to such varied phenomena as high-temperature superconductivity, topological superconductivity, and the paradigmatic quantum phase transition, the superconductor-insulator transition.
Friday, April 12, 2019 - 3:10pm to 4:00pm
· Colloquium
Prof. Nandini Trivedi, Ohio State University
Within the Landau paradigm we define a phase or a state of matter by a local order parameter, as in crystals, magnets and superconductors. However, due to frustration generated by geometry and interactions, some materials do not order, even at the lowest temperatures, and enter a new state of matter called a quantum spin liquid.
Friday, March 29, 2019 - 3:10pm to 4:00pm
· Colloquium
Dr. Joshua Wood, University of Wisconsin
Since discovering the existence of a diffuse flux of high-energy astrophysical neutrinos in 2013, the IceCube Neutrino Observatory has worked to identify astrophysical sources of high energy neutrinos. Recently, a high-energy neutrino event detected by IceCube on 22 September 2017 was coincident in direction and time with a gamma-ray flare from the blazar TXS 0506+056.