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The advent of milli-kelvin scanning tunneling microscopes (STM) with inbuilt magnetic fields has opened access to the study of magnetic phenomena with atomic resolution at surfaces. In the case of single atoms adsorbed on a surface, the…

Mesoscale and Nanoscale Physics · Physics 2012-06-19 Jean-Pierre Gauyacq , Nicolas Lorente , Frederico Dutilh Novaes

We investigate the airborne transport of particles on a granular surface by the saltation mechanism through numerical simulation of particle motion coupled with turbulent flow. We determine the saturated flux $q_{s}$ and show that its…

Soft Condensed Matter · Physics 2009-11-11 M. P. Almeida , J. S. Andrade , H. J. Herrmann

The homeostasis of epithelial tissue relies on a balance between the self-renewal of stem cell populations, cellular differentiation, and loss. Although this balance needs to be tightly regulated to avoid pathologies, such as tumor growth,…

Biological Physics · Physics 2024-04-10 Johannes C. Krämer , Edouard Hannezo , Gerhard Gompper , Jens Elgeti

Active hydrodynamic theories are a powerful tool to study the emergent ordered phases of internally driven particles such as bird flocks, bacterial suspension and their artificial analogues. While theories of orientationally ordered phases…

Soft Condensed Matter · Physics 2019-03-06 Ananyo Maitra , Martin Lenz

A study of the dynamics of a tunneling particle in a driven bistable potential which is moderately-to-strongly coupled to a bath is presented. Upon restricting the system dynamics to the Hilbert space spanned by the M lowest energy…

Condensed Matter · Physics 2009-11-07 M. Thorwart , M. Grifoni , P. Hänggi

The discovery of high-mobility two-dimensional electron gas and low carrier density superconductivity in multiple SrTiO$_3$-based heterostructures has stimulated intense interest in the surface properties of SrTiO$_3$. The recent discovery…

Mesoscale and Nanoscale Physics · Physics 2024-05-31 Cui Ding , Wenfeng Dong , Xiaotong Jiao , Zhiyu Zhang , Guanming Gong , Zhongxu Wei , Lili Wang , Jin-Feng Jia , Qi-Kun Xue

The activation and dissociation of H2 molecules on Cu(001) surface is studied theoretically. The activation barrier for the dissociation of H2 on Cu(001) is determined by first-principles calculations to be ~ 0.59 eV in height. Electron…

Mesoscale and Nanoscale Physics · Physics 2023-06-06 Xiaofan Yu , Yangwu Tong , Yong Yang

The amplitude and probability of quantum transitions are represented as a path integrals in energy state space of the investigated multi-level quantum system. Using this approach we consider rotational dynamics of nitrogen molecules…

Quantum Physics · Physics 2014-07-16 Alexander Biryukov , Mark Shleenkov

The two-dimensional electron gas (2DEG) in reduced strontium titanate offers a versatile platform for oxide electronics, yet its dissipation mechanisms under field driven charge fluctuations remain poorly understood. Here, we combine…

Materials Science · Physics 2026-05-13 Akash Gupta , Marcin Kisiel , Remy Pawlak , Ernst Meyer

The atomic structure of well-ordered single steps on the Si(111)-\sqrt{3}\times\sqrt{3}-Sn surface and the dynamics of Sn adatoms in the vicinity of these steps was studied. The work was performed using low-temperature scanning tunneling…

Materials Science · Physics 2021-09-29 R. A. Zhachuk , D. I. Rogilo , A. S. Petrov , D. V. Sheglov , A. V. Latyshev , S. Colonna , F. Ronci

The local electronic structure of the SrO-terminated SrTiO3(001) surface was explored using scanning tunneling microscopy. At low bias voltages in the empty states, a unidirectional structure with a periodicity of 3 unit cells, superimposed…

Strongly Correlated Electrons · Physics 2015-05-27 Katsuya Iwaya , Ryota Shimizu , Takeo Ohsawa , Tomihiro Hashizume , Taro Hitosugi

The frontier orbital sequence of individual dicyanovinyl-substituted oligothiophene molecules is studied by means of scanning tunneling microscopy. On NaCl/Cu(111) the molecules are neutral and the two lowest unoccupied molecular states are…

Mesoscale and Nanoscale Physics · Physics 2017-08-09 Ping Yu , Nemanja Kocić , Benjamin Siegert , Andrea Donarini , Jascha Repp

We examine the dynamics of small anisotropic particles (spheroids) sedimenting through homogeneous isotropic turbulence using direct numerical simulations and theory. The gravity-induced inertial torque acting on sub-Kolmogorov spheroids…

Atmospheric and Oceanic Physics · Physics 2020-07-22 Prateek Anand , Samriddhi Sankar Ray , Ganesh Subramanian

Scattering of electrons by localized spins is the ultimate process enabling electrical detection and control of the magnetic state of a spin-doped material. At the molecular scale, this scattering is mediated by the electronic orbitals…

Hydrogen produced from the photocatalytic splitting of water is one of the reliable alternatives to replace the polluting fossil and the radioactive nuclear fuels. Here, we provide unequivocal evidence for the existence of blue- and…

The electronic structure of SrTiO3(001) surfaces was studied using scanning tunneling spectroscopy and density-functional theory. With high dynamic range measurements, an in-gap transition level was observed on SrO-terminated surfaces, at…

Materials Science · Physics 2015-09-16 Wattaka Sitaputra , Nikhil Sivadas , Marek Skowronski , Di Xiao , Randall M. Feenstra

A new combination of first principle molecular dynamics (MD) simulations with a rate equation model presented in the preceding paper (paper I) is applied to analyze in detail the scattering of argon atoms from a platinum (111) surface. The…

Plasma Physics · Physics 2018-09-10 A Filinov , M Bonitz , D Loffhagen

We reported an imaging study of the dissociation dynamics of temporary negative ion N2O- formed in the low-energy electron attachment, e- + N2O -> N2O- -> N2 + O-. With the help of ab initio molecular dynamics calculations, the evolution of…

Chemical Physics · Physics 2015-06-11 Lei Xia , Bin Wu , Hong-Kai Li , Xian-Jin Zeng , Shan Xi Tian

The k-space polarization structure and its strain response in SrTiO3 with rotational instability are studied using a combination of first-principles density functional calculations, modern theory of polarization, and analytic…

Computational Physics · Physics 2015-05-20 Yanpeng Yao , Huaxiang Fu

We characterize the super-diffusive dynamics of tracer particles in an electrohydrodynamically driven emulsion of oil droplets in an immiscible oil medium, where the amplitude and frequency of an external electric field are the control…

Applied Physics · Physics 2018-08-15 Somayeh Khajehpour Tadavani , Anand Yethiraj
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