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Morphological Symmetry Breaking During Epitaxial Growth at Grazing Incidence
Jianxin Zhong, Enge Wang, Qian Niu +1
It is shown that, in submonolayer growth at off-normal incidence, even much less than one percent of transfer from the condensation energy of the deposited atoms into adatom motion…
Dynamical Scaling Properties of Electrons in Quantum Systems with Multifractal Eigenstates
Jianxin Zhong, Zhenyu Zhang, Michael Schreiber +2
We study the intricate relationships between the dynamical scaling properties of electron wave packets and the multifractality of the eigenstates in quantum systems. Numerical simu…
Landau and Dynamical Instabilities of the Superflow of Bose-Einstein Condensates in Optical Lattices
Biao Wu, Qian Niu
The superfluidity of Bose-Einstein condensates in optical lattices are investigated. Apart from the usual Landau instability which occurs when a BEC flows faster than the speed of…
The Edge-State Theory of Integer-Quantum-Hall-Effect to Insulator Transition
X. R. Wang, X. C. Xie, Q. Niu +1
Direct transitions, driven by disorder, from several integral quantum Hall states to an insulator have been observed in experiment. This finding is enigmatic in light of a theoreti…
The role of Berry phase in the spectrum of order parameter dynamics: a new perspective on Haldane's conjecture on antiferromagnetic spin chains
Yue Yu, Qian Niu
We formulate the dynamics of local order parameters by extending the recently developed adiabatic spinwave theory involving the Berry curvature, and derive a formula showing explic…