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Design and Characterization of a High Vacuum Metals Deposition System based on Electron Beam Evaporation 

Ramírez Porras, Arturo; Avendaño Soto, Esteban Damián; Araya Pochet, José (2010-08-03)
We describe a high vacuum metals deposition system based ona variation of a pendant-drop type electron beam evaporator.This system uses a Molybdenum crucible as an evaporantinstead of a rod or wire usually used in ultrathin ...
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Fundamentals of silicene 

Willatzen, Morten; Lew Yan Voon, Lok Chong; Guzmán Verri, Gian Giacomo (2017-08-02)
Silicene is a single atomic layer of silicon (Si) much like graphene, the first example of an elemental twodimensional (2D) nanomaterial whose study led to the 2010 Nobel Prize in Physics. Until 2010 or so, the only known ...
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Negative Thermal Expansion in Open Perovskites near the Precipice of Structural Stability 

Occhialini, Connor A.; Guzmán Verri, Gian Giacomo; Handunkanda, Sahan U.; Hancock, Jason N. (2018)
Negative thermal expansion (NTE) describes the anomalous propensity of materials to shrink when heated. Since its discovery, the NTE effect has been found in a wide variety of materials with an array of magnetic, electronic ...
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Negative thermal expansion near two structural quantum phase transitions Connor 

Guzmán Verri, Gian Giacomo; Hancock, Jason N. (2017-12-18)
Recent experimental work has revealed that the unusually strong, isotropic structural negative thermal expansion in cubic perovskite ionic insulator ScF3 occurs in excited states above a ground state tuned very near a ...
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Large isotropic negative thermal expansion above a structural quantum phase transition 

Handunkanda, Sahan U.; Curry, Erin B.; Voronov, Vladimir; Said, Ayman H.; Guzmán Verri, Gian Giacomo; Brierley, Richard T.; Littlewood, Peter B.; Hancock, Jason N. (2015-10-01)
Perovskite structured materials contain myriad tunable ordered phases of electronic and magnetic origin with proven technological importance and strong promise for a variety of energy solutions. An always-contributing ...
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Landau theory and giant room-temperature barocaloric effect 

Corrales Salazar, A.; Brierley, Richard T.; Littlewood, Peter B.; Guzmán Verri, Gian Giacomo (2017-10-17)
The structural phase transitions of MF3 (M = Al, Cr, V, Fe, Ti, Sc) metal trifluorides are studied within a simple Landau theory consisting of tilts of rigid MF6 octahedra associated with soft antiferrodistortive optic ...
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Electronic structure of silicon-based nanostructures 

Guzmán Verri, Gian Giacomo; Lew Yan Voon, Lok Chong (2007-08-30)
We have developed a unifying tight-binding Hamiltonian that can account for the electronic properties of recently proposed Si-based nanostructures, namely, Si graphene-like sheets and Si nanotubes. We considered the sp3s∗ ...

Cooperative elastic fluctuations provide tuning of the metal-insulator transition 

Guzmán Verri, Gian Giacomo (2019)
Metal-to-insulator transitions driven by strong electronic correlations occur frequently in condensed matter systems, and are associated with remarkable collective phenomena in solids, including superconductivity and ...
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Stochastic approach to the smart quantum confinement model in porous silicon 

Ramírez Porras, Arturo; Weisz, S. Z. (Surface Science 515 (2002) L509-L513, 2002)
A model that encompasses two approaches to explain the photoluminescence in p-type porous silicon is proposed. The model considers a stochastic distribution of nanocrystallite sizes within the porous matrix and explain the ...

Vacuum treatment to stabilize oxidation at low temperature region in porous silicon 

Allen, Kevin; Pereira Cubillo, Juan Sebastián; Ramírez Porras, Arturo (2020)
Oxidation in porous silicon is studied for as-etched samples and samples subjected to high vacuum at room temperature. Attenuated Total Reflectance (ATR) measurements in infrared spectroscopy for temperatures ranging from ...
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AuthorGuzmán Verri, Gian Giacomo (12)Ramírez Porras, Arturo (5)Littlewood, Peter B. (3)a28979f1-db4b-4d47-846a-844409ba6feb (2)Arce Gamboa, José Rafael (2)Avendaño Soto, Esteban Damián (2)Brierley, Richard T. (2)Handunkanda, Sahan U. (2)Lew Yan Voon, Lok Chong (2)Allen, Kevin (1)... View MoreTypeartículo científico (14)preprint (2)capítulo de libro (1)info:eu-repo/semantics/acceptedVersion (1)info:eu-repo/semantics/conferenceObject (1)Objeto de conferencia (1)ProcedenceVicerrectoría de Investigación (18)Vicerrectoría de Docencia (5)... View MoreHas File(s)Yes (17)No (1)

  • Repositorios universitarios

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