147 citations · 570 across the 18 of their papers we have counts for
18 papers
Formation of holographic vortex in a rotating shell-shaped superfluid
Chang-Xu Yan, Hao-Ran Chang, Meng Gao +2
We investigate the holographic superfluid dynamics subjected to external rotation on a spherical geometry. Through a linear perturbation analysis, we identify several dynamically u…
Highly anisotropic optical conductivities in two-dimensional tilted semi-Dirac bands
Chang-Xu Yan, Chao-Yang Tan, Hong Guo +1
Within linear response theory, the absorptive part of highly anisotropic optical conductivities are analytically calculated for distinct tilts in two-dimensional (2D) tilted semi-D…
Plasmons in a two-dimensional nonsymmorphic nodal-line semimetal
Jin Cao, Hao-Ran Chang, Xiaolong Feng +2
Recent experiments have established a type of nonsymmorphic symmetry protected nodal lines in the family of two-dimensional (2D) composition tunable materials NbSiTe. Here,…
Longitudinal optical conductivities of tilted Weyl fermions in arbitrary dimensionality
Jian-Tong Hou, Peng Wang, Hong Guo +1
The unified form of longitudinal optical conductivities (LOCs) in the tilted Weyl fermions for arbitrary spatial dimensionality are analytically calculated and expressed in terms o…
Anomalous acoustic plasmons in two-dimensional over-tilted Dirac bands
Chang-Xu Yan, Furu Zhang, Chao-Yang Tan +3
The over-tilting of Dirac cones has led to various fascinating quantum phenomena. Here we find that two anomalous acoustic plasmons (AAPs) are dictated by the distinct geometry of…
Effects of spatial dimensionality and band tilting on the longitudinal optical conductivities in Dirac bands
Jian-Tong Hou, Chang-Xu Yan, Chao-Yang Tan +4
We report a unified theory based on linear response, for analyzing the longitudinal optical conductivity (LOC) of materials with tilted Dirac cones. Depending on the tilt parameter…
Signatures of Lifshitz transition in the optical conductivity of two-dimensional tilted Dirac materials
Chao-Yang Tan, Jian-Tong Hou, Chang-Xu Yan +2
Lifshitz transition is a kind of topological phase transition in which the Fermi surface is reconstructed. It can occur in the two-dimensional (2D) tilted Dirac materials when the…
Anisotropic longitudinal optical conductivities of tilted Dirac bands in 1T-MoS
Chao-Yang Tan, Chang-Xu Yan, Yong-Hong Zhao +2
1T-MoS exhibits valley-spin-polarized tilted Dirac bands in the presence of external vertical electric field and undergoes a topological phase transition between the t…
Reduction for one-loop tensor Feynman integrals in the relativistic quantum field theories at finite temperature and/or finite density
Hao-Ran Chang
The \emph{conventional} Passarino-Veltman reduction is a systematic procedure based on the Lorentz covariance, which can efficiently reduce the one-loop tensor Feynman integrals in…
Dynamical correlation functions and the related physical effects in three-dimensional Weyl/Dirac semimetals
Jianhui Zhou, Hao-Ran Chang
We present a unified derivation of the dynamical correlation functions including density-density, density-current and current-current, of three-dimensional Weyl/Dirac semimetals by…
RKKY interaction in three-dimensional electron gases with linear spin-orbit coupling
Shi-Xiong Wang, Hao-Ran Chang, Jianhui Zhou
We theoretically study the impacts of linear spin-orbit coupling (SOC) on the Ruderman-Kittel-Kasuya-Yosida interaction between magnetic impurities in two kinds of three-dimensiona…
RKKY interaction of magnetic impurities in Dirac and Weyl semimetals
Hao-Ran Chang, Jianhui Zhou, Shi-Xiong Wang +2
We theoretically study the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between magnetic impurities in both Dirac and Weyl semimetals (SMs). We find that the internode process,…
Plasmon mode as a detection of the chiral anomaly in Weyl semimetals
Jianhui Zhou, Hao-Ran Chang, Di Xiao
Weyl semimetals are one kind of three-dimensional gapless semimetal with nontrivial topology in the momentum space. The chiral anomaly in Weyl semimetals manifests as a charge imba…
Probing the Topological Phase Transition via Density Oscillations in Silicene and Germanene
Hao-Ran Chang, Jianhui Zhou, Hui Zhang +1
We theoretically investigated two kinds of density oscillations: the Friedel oscillation and collective excitation in the silicene and germanene within random phase approximation,…
Higgs decays to gamma l+ l- in the standard model
Yi Sun, Hao-Ran Chang, Dao-Neng Gao
The radiative Higgs decays h -> gamma l+l- with l=e,mu and tau are analyzed in the standard model using m_h=125 GeV. Both tree and one-loop diagrams for the processes are evaluated…
Gravitational Corrections to Theory with Spontaneously Broken Symmetry
Hao-Ran Chang, Wen-Tao Hou, Yi Sun
We consider a complex scalar theory with spontaneously broken global U(1) symmetry, minimally coupling to perturbatively quantized Einstein gravity which is treated as an ef…
One loop integrals reduction
Yi Sun, Hao-Ran Chang
By further examining the symmetry of external momenta and masses in Feynman integrals, we fulfilled the method proposed by Battistel and Dallabona, and showed that recursion relati…
Influence of Fermion Velocity Renormalization on Dynamical Mass Generation in QED
Hao-Ran Chang, Jing-Rong Wang, Jing Wang
We study dynamical fermion mass generation in (2+1)-dimensional quantum electrodynamics with a gauge field coupling to massless Dirac fermions and non-relativistic scalar bosons. W…