Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure
Kang L. Wang group has published a paper in Science on Majoran fermion modes. They report transport measurements that suggest the existence of one-dimensional chiral Majorana fermion modes in the hybrid system of a quantum anomalous Hall insulator thin film coupled with a superconductor. As the external magnetic field is swept, half-integer quantized conductance plateaus are observed at the locations of magnetization reversals, giving a distinct signature of the Majorana fermion modes.This work is highlighted in UCLA news.
Above 400-K robust perpendicular ferromagnetic phase in a topological insulator
The Shi group has made topological insulator (TI) surfaces magnetic from room temperature to more than 400 Kelvin. The Curie temperature (Tc) is enhanced by exchange coupling TIs to Tm3Fe5O12, a high-Tc magnetic insulator with perpendicular magnetic anisotropy. Distinct squared anomalous Hall hysteresis loops at 400 K reveal that the TI surface states acquire robust ferromagnetism. The paper was published in SCIENCE ADVANCES and highlighted by UCR Today.
SHINES Workshop 2017
SHINES will hold a workshop on spin and heat from January 12-13th, 2017 at the UCR Palm Desert Center.
Workshop program is here http://efrcshines.ucr.edu/files/1.pdf.
Direct observation of confined acoustic phonons in semiconductor nanowires
The research team led by SHINES PI Prof. Alex Balandin at UC Riverside discovered a new method to dissipate heat in electronic devices by modulating the flow of phonons (elemental excitations) through semiconductor nanowires. They observed multiple confined acoustic phonon polarization branches in GaAs nanowires, at a length scale that exceeds the grey phonon mean-free path in this material by almost an order-of-magnitude. More on News Page
Publication at Nature Communications.
SHINES symposium at Magnetism and Magnetic Materials 2016
Invited talks from SHINES PIs Prof. Shi, Prof. Wang, and Prof. Wu for symposium titled “Topological Insulator/ Ferromagnet Heterostrctures for Spintronics” at MMM Conference 2016.
More on News page
Professor Kang L. Wang has been elected
as a member of Academia Sinica!
Professor Wang is the lead investigator
of the SHINES Spin-orbit Coupling Exploration.
Research on the Enhanced Spin Seebeck Effect Published by Shi Group
The Shi Group has published a paper in Nature Communications on the enhanced spin Seebeck effect signal in (BixSb1-x)2Te3,a topological insulator. The effect arises due to spin-momentum locked topological surface states that are accessed by tuning the Fermi level into the bulk insulator gap.
Photo-spin-voltaic Effect Observed by M. Wu Group
Mingzhong Wu's group has identified the Photo-spin-voltaic effect in Pt-YIG. The effect consists of a pure spin current that arises due to photon-driven, spin-dependent excitation of electrons in several platinum atomic layers near the platinum/magnetic insulator interface. The paper was published in Nature Physics.
Shi Group Research Profiled by UCR Today
A team of researchers, led by Jing Shi's group at UC Riverside, have demonstrated for the first time the transmission of electrical signals through insulators in a sandwich-like structure, a development that could help create more energy efficient electronic devices.
Article at Nature Communications
SHINES Research Highlighted by the US Department of Energy
In May, the newsletter of the DOE Office of Science described recent results obtained by the Balandin Group showing acoustic phonon confinement effects in nanoporous arrays. Investigation of the acoustic phonons was made possible by development of the Brillouin-Mandelstam spectroscopy tool at UC Riverside. Fariborz Kargar (pictured) was first author of the paper published in Applied Physics Letters.