Science Highlights
Recent highlights of projects by the TIQM community
Index of publications (coming soon)
Fractional quantum anomalous Hall effect observed
TIQM researchers have observed the fractionally quantized Hall effect (with a fractional Chern number) at zero magnetic field for the first time. The experimental system they use is twisted bilayer 2D semiconductor MoTe2.
E Anderson et al, Science 381, 325 (2023) J Cai et al, Nature (2023)
H Park et al, Nature (2023) UW News
See our next Winter Workshop: New Developments in Fractionalization
A new twist on graphite
Though ancient, graphite still has the capacity to surprise. By twisting a single sheet of graphene within a bulk graphite thin film, TIQM researchers created a new class of moiré materials with mixed 2- and 3-dimensional properties.
D Waters et al, Nature (2023)
UW News IEEE Spectrum Chemistry World Physics World
A new LiDAR technology by integrated acousto-optic beam steering
TIQM researchers invented a new integrated LiDAR technology enabled by a chip-scale acousto-optic beam-steering device. The simplicity and low cost of the new method make it a promising technology.
Light-induced ferromagnetism in moiré superlattices
TIQM researchers discovered that laser light can trigger magnetism in a normally nonmagnetic material.
X Wang et al, Nature 604, 468 (2022) UW News
Journal Club for Condensed Matter Physics
"Berryogenesis" and nonlinear collective mode dynamics
In a first proof-of-concept work, the nonlinear dynamics resulting from feedback of plasmonic internal fields onto electronic band structure was explored. Remarkably, this feedback can lead to spontaneous non-equilibrium magnetism that is both driven by and helps to sustain a non-vanishing Berry flux that emerges in the steady state.
MS Rudner and J Song, Nature Physics 15, 1017 (2019)
News and Views: A sudden twist Featured on Phys.org
Many-body Dynamical Delocalization with Ultracold Atoms
A long-standing open question on the evolution of dynamically localized states in the presence of many-body interactions was experimentally studied using a one-dimensional ultracold gas periodically kicked by a pulsed optical lattice. Researchers observed the interaction-driven emergence of dynamical delocalization and the onset of many-body quantum chaos.
J. See Toh et al. Nature Physics 18, 1297 (2022)
News & Views: Kicked Rotors Back in Action
Photonic Topological Baths for Quantum Simulation
Using high quality-factor silicon photonic resonators, researchers simulated topological Hamiltonian. By probing every super-mode, they explored the utility of such a platform to create topological bath for quantum simulation.
Electronic pumping of heat without charge transfer
A new type of electron-mediated pumping of heat was proposed in which the transfer of heat is not accompanied by charge transfer or a voltage build-up, offering advantages over traditional thermoelectric cooling setups. This pumping may be realized in charge-neutral electron systems, such as graphene, coupled to an external electric potential, such as can be generated by a travelling surface acoustic wave.
