Publications (37)
Graphdiyne: a two-dimensional thermoelectric material with high figure of merit
L. Sun, P. H. Jiang, H. J. Liu +6
As a new carbon allotrope, the recently fabricated graphdiyne has attracted much attention due to its interesting two-dimensional character. Here we demonstrate by multiscale compu…
Molecular dynamics simulations of the lattice thermal conductivity of CuInTe2
J. Wei, H. J. Liu, L. Cheng +5
The lattice thermal conductivity of thermoelectric material CuInTe2 is predicted using classical molecular dynamics simulations, where a simple but effective Morse-type interatomic…
Predicting the optimized thermoelectric performance of MgAgSb
C. Y. Sheng, H. J. Liu, D. D. Fan +5
Using first-principles method and Boltzmann theory, we provide an accurate prediction of the electronic band structure and thermoelectric transport properties of alpha-MgAgSb. Our…
MoS2 nanoribbons as promising thermoelectric materials
D. D. Fan, H. J. Liu, L. Cheng +3
The thermoelectric properties of MoS2 armchair nanoribbons with different width are studied by using first-principles calculations and Boltzmann transport theory, where the relaxat…
Enhanced thermoelectric performance of carbon nanotubes at elevated temperature
P. H. Jiang, H. J. Liu, D. D. Fan +5
The electronic and transport properties of (10, 0) single-walled carbon nanotube are studied by performing the first-principles calculations and semi-classical Boltzmann theory. It…
Moderate deviations for a stochastic wave equation in dimension three
L. Cheng, R. Li, R. Wang +1
In this paper, we proved a central limit theorem and established a moderate deviation principle for a perturbed stochastic wave equation defined on $[0,T]\times \rr^3$. This equati…
Kondo resonances and anomalous gate dependence of electronic conduction in single-molecule transistors
L. H. Yu, Z. K. Keane, J. W. Ciszek +5
We report Kondo resonances in the conduction of single-molecule transistors based on transition metal coordination complexes. We find Kondo temperatures in excess of 50 K, comparab…
Phosphorene nanoribbon as a promising candidate for thermoelectric applications
J. Zhang, H. J. Liu, L. Cheng +6
In this work, the electronic properties of phosphorene nanoribbons with different width and edge configurations are studied by using density functional theory. It is found that the…
Competing Lattice and Defect Dynamics Govern Terahertz-Induced Ferroelectricity in Quantum Paraelectric SrTiO
L. Cheng, K. Hu, S. Yang +3
Intense terahertz (THz) pulses induce transient inversion-symmetry breaking in quantum paraelectric SrTiO, yet the underlying mechanism remains controversial. Using fields up t…
YBCO-buffered NdBCO film with higher thermal stability in seeding REBCO Growth
H. H. Xu, Y. Y. Chen, L. Cheng +3
In this work, we report a strengthened superheating effect caused by a buffering YBa2Cu3Oy (Y123 or YBCO) layer in the Nd1+xBa2-xCu3O7-y (Nd123 or NdBCO) thin film with MgO substra…
Neutrino NSI in archaeological Pb
D. Alloni, G. Benato, P. Carniti +47
Dark matter direct detection experiments can observe solar neutrinos via coherent elastic neutrino-nucleus scattering, making it possible to test new physics in the neutrino sector…
Effects of topological edge states on the thermoelectric properties of Bi nanoribbons
L. Cheng, H. J. Liu, J. H. Liang +4
Using first-principles calculations combined with Boltzmann transport theory, we investigate the effects of topological edge states on the thermoelectric properties of Bi nanoribbo…
Low Ghz loss in sputtered epitaxial Fe
C. Scheck, L. Cheng, W. E. Bailey
We show that sputtered, pure epitaxial iron films can have high-frequency loss as low as, or lower than, any known metallic ferromagnetic heterostructure. Minimum 34 Ghz ferromagne…
Thermoelectric properties of graphyne from first-principles calculations
P. H. Jiang, H. J. Liu, L. Cheng +4
The two-dimensional graphene-like carbon allotrope, graphyne, has been recently fabricated and exhibits many interesting electronic properties. In this work, we investigate the the…
"Listening" to the spin noise of conduction electrons in bulk n:GaAs
S. A. Crooker, L. Cheng, D. L. Smith
We report a comprehensive study of stochastic electron spin fluctuations -- spin noise -- in lightly doped (-type) bulk GaAs, which are measured using sensitive optical magnetom…
The rhombohedral Sb2Se3 is also an intrinsic topological insulator
G. H. Cao, H. J. Liu, J. H. Liang +3
Topological insulators are new class of quantum materials, which have insulating energy gaps in bulk, but exhibit gapless edge states or surface states that are protected by time-r…
Tuning the carrier concentration to improve the thermoelectric performance of CuInTe2 compound
J. Wei, H. J. Liu, L. Cheng +5
The electronic and transport properties of CuInTe2 chalcopyrite are investigated using density functional calculations combined with Boltzmann theory. The band gap predicted from h…
High thermoelectric performance of distorted Bismuth (110) layer
L. Cheng, H. J. Liu, J. Zhang +6
The thermoelectric properties of distorted bismuth (110) layer are investigated using first-principles calculations combined with the Boltzmann transport equation for both electron…
Radiation fields by intermediate-age stellar populations with binaries as ionizing sources of H II regions
F. Zhang, L. Li, L. Cheng +4
Radiation fields emitted by O, B-type stars or young stellar populations (SPs) are generally considered as significant central ionizing sources (CISs) of classic H II regions. In o…
XMCD characterization of rare-earth dopants in NiFe(50nm): microscopic basis of engineered damping
W. E. Bailey, L. Cheng, H. Song
We present direct evidence for the contribution of local orbital moments to the damping of magnetization precession in magnetic thin films. Using x-ray magnetic circular dichroism…
Multi-seeded melt growth (MSMG) of bulk Y-Ba-Cu-O using thin-film seeds
T. Y. Li, C. L. Wang, L. J. Sun +9
Y-Ba-Cu-O (YBCO) and Sm-Ba-Cu-O (SmBCO) thin films have been used for the first time as heterogeneous seeds to multi-seed successfully the melt growth of bulk YBCO in a multi-seede…
LaPtSb: a half-Heusler compound with high thermoelectric performance
Q. Y. Xue, H. J. Liu, D. D. Fan +3
The electronic and transport properties of the half-Heusler compound LaPtSb are investigated by performing first-principles calculations combined with semi-classical Boltzmann theo…
Effects of van der Waals interactions and quasiparticle corrections on the electronic and transport properties of Bi2Te3
L. Cheng, H. J. Liu, J. Zhang +4
We present a theoretical study of the structural, electronic and transport properties of bulk Bi2Te3 within density functional theory taking into account the van der Waals interact…
Extremely low-energy collective modes in a quasi-one-dimensional system
Z. X. Wei, S. Zhang, Y. L. Su +5
We have investigated the quasiparticle dynamics and collective excitations in the quasi-one-dimensional material ZrTe using ultrafast optical pump-probe spectroscopy. Our time-…
Thermal conductivities of phosphorene allotropes from first-principle calculations: a comparative study
J. Zhang, H. J. Liu, L. Cheng +5
Phosphorene has attracted tremendous interest recently due to its intriguing electronic properties. However, the thermal transport properties of phosphorene, especially for its all…
Correlated Source Coded Sequences with Compromised Channel and Source Symbols using Shannon's Cipher System
R. Balmahoon, H. Vinck, L. Cheng
Correlated sources are present in communication systems where protocols ensure that there is some predetermined information for sources to transmit. Here, two correlated sources ac…
First-principles study of the effects of electron-phonon coupling on the thermoelectric properties: a case study of SiGe compound
D. D. Fan, H. J. Liu, L. Cheng +2
It is generally assumed in the thermoelectric community that the lattice thermal conductivity of a given material is independent of the electronic properties. This perspective is h…
Regulating electron diffraction direction with cylindrically symmetric rotating crystal
L. Cheng, B. Da, X. Liu +12
We report a promising InSiO film that allows simultaneous observation of sample morphology and Kikuchi patterns in raster scan mode of scanning electron microscopy. This new experi…
Inelastic electron tunneling via molecular vibrations in single-molecule transistors
L. H. Yu, Z. K. Keane, J. W. Ciszek +4
In single-molecule transistors, we observe inelastic cotunneling features that correspond energetically to vibrational excitations of the molecule, as determined by Raman and infra…
Precessional dynamics of elemental moments in a ferromagnetic alloy
W. E. Bailey, L. Cheng, D. Keavney +3
We demonstrate an element-specific measurement of magnetization precession in a metallic ferromagnetic alloy, separating Ni and Fe moment motion in Ni81Fe19. Pump-probe X-ray magne…
Low relaxation rate in a low-Z alloy of iron
C. Scheck, L. Cheng, I. Barsukov +2
The longest relaxation time and sharpest frequency content in ferromagnetic precession is determined by the intrinsic (Gilbert) relaxation rate \emph{}. For many years, pure iro…
Understanding the electronic and phonon transport properties of thermoelectric material BiCuSeO: a first-principles study
D. D. Fan, H. J. Liu, L. Cheng +5
Using first-principles pseudopotential method and Boltzmann transport theory, we give a comprehensive understanding of the electronic and phonon transport properties of thermoelect…
Theoretical study of the thermoelectric properties of SiGe nanotubes
J. Wei, H. J. Liu, X. J. Tan +5
The thermoelectric properties of two typical SiGe nanotubes are investigated using a combination of density functional theory, Boltzmann transport theory, and molecular dynamics si…
Accretion Disk Temperatures and Continuum Colors in QSOs
E. W. Bonning, L. Cheng, G. A. Shields +2
Accretion disks around supermassive black holes are widely believed to be the dominant source of the optical-ultraviolet continuum in many classes of active galactic nuclei (AGN).…
High thermoelectric performance can be achieved in black phosphorus
J. Zhang, H. J. Liu, L. Cheng +6
Few-layer black phosphorus has recently emerged as a promising candidate for novel electronic and optoelectronic device. Here we demonstrate by first-principles calculations and Bo…
Low voltage graphene interface engineered organic ferroelectric tunnel junction devices
S. Natani, P. Khajanji, L. Cheng +5
It has been indicated that the path forward for the widespread usage of ferroelectric (FE) materials may be considerably facilitated through the reduction of programming voltages t…
Viscous Effects on Elliptic Flow and Shock Waves
I. Bouras, L. Cheng, A. El +4
Fast thermalization and a strong buildup of elliptic flow of QCD matter as found at RHIC are understood as the consequence of perturbative QCD (pQCD) interactions within the 3+1 di…