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We report the effect of varying cobalt thickness on the temperature-dependent time decay of the electrical resistance of Co/Sb multilayer samples. We find that for a given temperature, a five fold change in the Co thickness produces a 100…

Mesoscale and Nanoscale Physics · Physics 2015-06-23 M. R. Madden , T. Alshammary , B. Grove , J. Phillips , K. Reaz , S. Hensley , G. G. Kenning

Understanding how the mechanism of charge transport through molecular tunnel junctions depends on temperature is crucial to control electronic function in molecular electronic devices. With just a few systems investigated as a function of…

Mesoscale and Nanoscale Physics · Physics 2016-05-27 Alvar R. Garrigues , Lejia Wang , Enrique del Barco , Christian A. Nijhuis

A new type of traveling interface modulations has been observed in the NH$_3$ + O$_2$ reaction on a Rh(110) surface. A model is set up which reproduces the effect, which is attributed to diffusional mixing of two spatially separated…

Pattern Formation and Solitons · Physics 2011-06-23 M. Rafti , H. Uecker , F. Lovis , V. Krupennikova , R. Imbihl

The low temperature properties of single level molecular quantum dots including both, electron-electron and electron-vibration interactions, are theoretically investigated. The calculated differential conductance in the Kondo regime…

Strongly Correlated Electrons · Physics 2016-04-20 P. Roura-Bas , L. Tosi , A. A. Aligia

Collisions of atoms and molecules with metal surfaces create electronic excitations in the metal, leading to nonadiabatic energy dissipation, inelastic scattering, and sticking. Mixed quantum-classical molecular dynamics simulation methods,…

Using a combination of scanning tunneling spectroscopy and atomic lateral manipulation, we obtained a systematic variation of the Kondo temperature ($T_\mathrm K$) of Co atoms on Ag(111) as a function of the surface state contribution to…

Strongly Correlated Electrons · Physics 2018-07-06 M. Moro-Lagares , J. Fernández , P. Roura-Bas , M. R. Ibarra , A. A. Aligia , D. Serrate

We carry out density-functional ab initio molecular dynamics (AIMD) simulations of Ti adatom (Tiad) migration on, and descent from, TiN <100>-faceted epitaxial islands on TiN(001) at temperatures T ranging from 1200 to 2400 K.…

Materials Science · Physics 2018-01-09 D. G. Sangiovanni , A. B. Mei , D. Edström , L. Hultman , V. Chirita , I. Petrov , J. E. Greene

We consider transport through a single-molecule magnet strongly coupled to metallic electrodes. We demonstrate that for half-integer spin of the molecule electron- and spin-tunneling \emph{cooperate} to produce both quantum tunneling of the…

Strongly Correlated Electrons · Physics 2009-11-11 C. Romeike , M. R. Wegewijs , W. Hofstetter , H. Schoeller

We found that a surface state induced by hydrogenation on the surface of SrTiO$_{3}$(001) (STO) did not obey the rigid band model, which was confirmed by in situ electrical resistivity measurements in ultrahigh vacuum. With exposure of…

Mesoscale and Nanoscale Physics · Physics 2020-03-04 Y. Takeuchi , R. Hobara , R. Akiyama , A. Takayama , S. Ichinokura , R. Yukawa , I. Matsuda , S. Hasegawa

Spin-crossover (SCO) molecules are versatile magnetic switches with applications in molecular electronics and spintronics. Downscaling devices to the single-molecule level remains, however, a challenging task since the switching mechanism…

The mechanism of rapid and selective heating of magnetic metal oxides under the magnetic field of microwaves which continues beyond the Curie temperature $ T_{c} $ is identified by using the Heisenberg model. Monte Carlo calculations based…

Materials Science · Physics 2009-02-13 Motohiko Tanaka , Hirohiko Kono , Koji Maruyama

We study heating and heat dissipation of a single \c60 molecule in the junction of a scanning tunneling microscope (STM) by measuring the electron current required to thermally decompose the fullerene cage. The power for decomposition…

Spinel Cobalt Vanadate CoV$_2$O$_4$ has been grown on (001) SrTiO$_3$ substrates. Using torque magnetometry experiments, we find that the previously observed temperature induced anisotropy change, where the easy axis changes from the out of…

Materials Science · Physics 2023-03-14 Sangsoo Kim , Christie Thompson , Yan Xin , Christianne Beekman

We demonstrate that the thermal Casimir-Polder forces on molecules near a conducting surface whose transition wavelengths are comparable to the molecule-surface separation are dependent on the ambient temperature and molecular polarization…

Atomic Physics · Physics 2015-06-12 Zhiying Zhu , Hongwei Yu , Bin Wang

Under irradiation of amorphous $As_{x}Se_{100-x}$ films by band-gap light, it was observed that lateral mass transport of the film material changed the direction of movement in the region (4 < x < 5 at%.) of topological structural…

Materials Science · Physics 2018-05-11 M. L. Trunov , P. M. Lytvyn

Cavity-mediated cooling of the center--of--mass motion of a transversally, coherently pumped atom along the axis of a high--Q cavity is studied. The internal dynamics of the atomic dipole strongly coupled to the cavity field is treated by a…

Quantum Physics · Physics 2007-05-23 Peter Domokos , Thomas Salzburger , Helmut Ritsch

Asymmetric electrical conductance is theoretically demonstrated on the surface of a topological insulator (TI) in the limit of infinitesimally small forward and reverse biases between two spin selective electrodes. The discontinuous…

Mesoscale and Nanoscale Physics · Physics 2015-09-16 Xiaopeng Duan , Xi-Lai Li , Yuriy G. Semenov , Ki Wook Kim

Local structural and electronic properties of thin Pb(111) films grown on Si(111)7x7 surface are experimentally studied by means of low-temperature scanning tunneling microscopy and spectroscopy (STM/STS). It is shown that the visible…

Mesoscale and Nanoscale Physics · Physics 2024-07-08 A. Yu. Aladyshkin

We report a novel atom extraction mechanism from the native substrate by means of a scanning tunneling microscope tip-crash on a Ag(111) surface at 5 K. Individual atoms are scattered on the surface when a silver coated tip is dipped into…

Materials Science · Physics 2015-06-24 Saw Wai Hla , Kai-Felix Braun , Violeta Iancu , Aparna Deshpande

We report manipulation of a Kondo resonance originated from the spin-electron interactions between a two-dimensional molecular assembly of TBrPP-Co molecules and a Cu(111) surface at 4.6 K using a low temperature scanning tunneling…

Materials Science · Physics 2015-06-25 Violeta Iancu , Aparna Deshpande , Saw-Wai Hla*
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