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The temperature dependence of peak widths in high resolution angle-resolved photoelectron spectroscopy from quantum well states in ultra thin Ag films on V(100) has been used to determine the electron-phonon coupling constant, lambda, for…

Strongly Correlated Electrons · Physics 2009-10-31 T. Valla , M. Kralj , A. Siber , M. Milun , P. Pervan , P. D. Johnson , D. P. Woodruff

Electrons mediate many of the interactions between atoms in a solid. Their propagation in a material determines its thermal, electrical, optical, magnetic and transport properties. Therefore, the constant energy contours characterizing the…

We investigate Ag(100) thin films epitaxially grown on a Fe(100) substrate using a low-temperature scanning tunneling microscope. Fabrication of a wedge structure by evaporating Ag through a shadow mask allows us to observe systematic…

Mesoscale and Nanoscale Physics · Physics 2015-04-01 Takashi Uchihashi , Tomonobu Nakayama

We report on the spectroscopic observation of a quantized electronic fine structure near the Fermi energy in thin Fe films grown on W(110). The quantum well states are detected down to binding energies of $\sim$10 meV by angle-resolved…

Strongly Correlated Electrons · Physics 2015-03-10 C. Seibel , A. Nuber , H. Bentmann , M. Mulazzi , P. Blaha , G. Sangiovanni , F. Reinert

Ag(111) films were deposited at room temperature onto H-passivated Si(111)-(1x1) substrates, and subsequently annealed at 300 C. An abrupt non-reactive Ag/Si interface is formed, and very uniform non-strained Ag(111) films of 6-12…

Soft Condensed Matter · Physics 2009-11-07 A. Arranz , J. F. Sanchez-Royo , J. Avila , V. Perez-Dieste , P. Dumas , M. C. Asensio

We have studied the electron-phonon (e-p) interaction in thin Cu and Au films at sub-Kelvin temperatures with the help of the hot electron effect, using symmetric normal metal-insulator-superconductor tunnel junction pairs as thermometers.…

Mesoscale and Nanoscale Physics · Physics 2015-06-24 J. T. Karvonen , L. J. Taskinen , I. J. Maasilta

We analyze the heat power $P$ between electrons and phonons in thin metallic films deposited on free-standing dielectric membranes in a temperature range in which the phonon gas has a quasi two-dimensional distribution. The quantization of…

Mesoscale and Nanoscale Physics · Physics 2016-02-17 Dragos-Victor Anghel , Sergiu Cojocaru

We address, by means of ab-initio calculations, the origin of the correlation that has been observed experimentally between the chemisorption energy of CO on nanoscale Cu(001) supported films and quantum-size effects. The calculated…

Mesoscale and Nanoscale Physics · Physics 2015-06-03 L. Mouketo , N. Binggeli , B. M'Passi-Mabiala

Quantum-well states above the Fermi energy in thin Yb(111)-metal films deposited on a W(110) single crystal were studied by low-temperature scanning tunneling spectroscopy. These states are laterally highly localized and give rise to sharp…

Other Condensed Matter · Physics 2009-11-10 D. Wegner , A. Bauer , G. Kaindl

Silver films were deposited at room temperature onto H-passivated Si(111) surfaces. Their electronic properties have been analyzed by angle-resolved photoelectron spectroscopy. Submonolayer films were semiconducting and the onset of…

Materials Science · Physics 2009-11-07 A. Arranz , J. F. Sanchez-Royo , J. Avila , V. Perez-Dieste , P. Dumas , M. C. Asensio

Quantum well states appear in metallic thin films due to the confinement of the wave function by the film interfaces. Using angle-resolved photoemission spectroscopy, we unexpectedly observe quantum well states in fractured single crystals…

In nano-structures such as thin films electron confinement results in the quantization of energy levels in the direction perpendicular to the film. The discretization of the energy levels leads to the oscillatory dependence of many…

Mesoscale and Nanoscale Physics · Physics 2018-08-09 Thomas Späth , Matthias Popp , Carmen Pérez León , Michael Marz , Regina Hoffmann-Vogel

Quantum oscillations in resistivity and magnetization at high magnetic fields are a macroscopic fingerprint of the energy quantization due to the cyclotron motion of quasiparticles. In a thin Weyl semimetal, a unique thickness dependent…

We study the optical and electrical properties of silver films with a graded thickness obtained through metallic evaporation in vacuum on a tilted substrate to evaluate their use as semitransparent electrical contacts. We measure their…

We have performed ab initio density functional calculations of thin Ag films on the Pd(111) surface. We have calculated the structural properties and the electronic bands of the Ag/Pd systems. There is a band gap in the electronic density…

Materials Science · Physics 2007-05-23 Predrag Lazic , Damir Sokcevic , Radovan Brako

This study shows that the dielectric function of crystalline Si quantum wells (c-Si QW) is influenced by both carrier confinement and electron-phonon interactions. The energy shifts and lifetime broadening of the excitonic E1 direct gap…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 Vimal K Kamineni , Alain C Diebold

We have studied the electronic states in 1-5 layers thick Ag films on V(100), by means of ab initio density functional calculations. Due to the mismatch of the electronic structure of Ag and V, quantum well states of both sp and d character…

Materials Science · Physics 2009-11-10 Predrag Lazic , Zeljko Crljen , Radovan Brako

The low temperature electron-phonon (e-ph) relaxation near the surface of noble metals, Cu and Ag, is studied by using the density-functional theory approach. The appearance of the surface phonon mode can give rise to a strong enhancement…

Materials Science · Physics 2020-05-20 Shota Ono

The theory of the interaction of electrons with acoustic phonons in multilayer nitride-based AlN/GaN nanostructures was developed for the first time at $T\geqslant 0$ using the method of finite-temperature Green's functions and Dyson…

Mesoscale and Nanoscale Physics · Physics 2021-01-20 I. V. Boyko , M. R. Petryk

Quantum shape effect appears under the size-invariant shape transformations of strongly confined structures. Such a transformation distinctively influences the thermodynamic properties of confined particles. Due to their characteristic…

Mesoscale and Nanoscale Physics · Physics 2022-11-08 Alhun Aydin , Jonas Fransson , Altug Sisman
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