Hai-Ping Cheng’s research interests include physical phenomena at ultra-small (nano) scale via large-scale computational approach with the goal of developing a basic understanding of physical properties of finite-size systems (cluster, nano-crystals, molecular/nano-wires) and their interaction with bulk matter.
Industry Expertise (2)
Areas of Expertise (2)
Media Appearances (1)
Gravitational waves detected 100 years after Einstein’s prediction
UF News online
The Florida group has grown over the years. Stephen Eikenberry joined in 2011 and is leading a group working on using astronomical telescopes—including the University of Florida's Gran Telescopio Canarias—to identify and study light from the astrophysical sources generating the LIGO signals. Hai-Ping Cheng joined in 2012 and studies the reasons for the observed excess noise in the optical coatings of the LIGO mirrors. From an initial size of about eight (four faculty, two postdoctoral research associates and two graduate students) in 1997, the UF LIGO group currently has about 20 members, including faculty (six), postdoctoral research associates (three), graduate students (six), and undergraduate students (five).
Multiple control of few-layer Janus MoSSe systemsPhysical Review Materials
In this computational work based on density functional theory, we study the electronic and electron transport properties of asymmetric multilayer MoSSe junctions, known as Janus junctions. Focusing on four-layer systems, we investigate the influence of electric field, electrostatic doping, strain, and interlayer stacking on the electronic structure. We discover that a metal-to-semiconductor transition can be induced by an out-of-plane electric field.
Tailoring electrocatalytic activity of in situ crafted perovskite oxide nanocrystals via size and dopant controlPNAS
The ability to scrutinize the correlation of dimension, composition, and dopant to electrocatalytic performance renders the development of highly active electrocatalysts. This work reports a general and robust strategy for crafting uniform perovskite oxide nanoparticles (i.e., BaTiO3 and La- and Co-doped BaTiO3) with controlled sizes and dopant compositions by employing amphiphilic star-like diblock copolymers as nanoreactors.
Modeling carrier mobility in graphene as a sensitive probe of molecular magnetsPhysical Review B
Carrier mobility in graphene on a GaAs substrate and its change due to the adsorption of molecular magnets, Mn12 and [Mn3]2, on the surface of graphene, is calculated from first principles. Phonon limited mobility is also calculated for comparison. For Mn12 adsorption on graphene, the mobility is compared for different organic ligands of Mn12 (−H, −CH3, and −CHCl2), while for [Mn3]2 dimers, the mobility is calculated for different linkers that yield the ferromagnetic and anti-ferromagnetic configurations of [Mn3] 2, as well as for different orientations of the molecule.
Tests of general relativity with binary black holes from the second LIGO-Virgo gravitational-wave transient catalogPhysical Review D
Gravitational waves enable tests of general relativity in the highly dynamical and strong-field regime. Using events detected by LIGO-Virgo up to 1 October 2019, we evaluate the consistency of the data with predictions from the theory. We first establish that residuals from the best-fit waveform are consistent with detector noise, and that the low- and high-frequency parts of the signals are in agreement.
GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo during the First Half of the Third Observing RunPhysical Review X
We report on gravitational-wave discoveries from compact binary coalescences detected by Advanced LIGO and Advanced Virgo in the first half of the third observing run (O3a) between 1 April 2019 15∶00 UTC and 1 October 2019 15∶00 UTC. By imposing a false-alarm-rate threshold of two per year in each of the four search pipelines that constitute our search, we present 39 candidate gravitational-wave events. At this threshold, we expect a contamination fraction of less than 10%.
- Sanibel Symposium : Organizer committee member