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Main Researchers

Patricio Vargas Cantín

Phone(s): (56 32) 2654142, (56 32) 2797656
Departamento de Física, Universidad Técnica Federico Santa María.
Avda. España 1680, Casilla 110, Valparaíso, Chile.

Professional Degree

  • Licenciado en Física (PUC).
  • Magister en Ciencias con mención en Física (PUC).
  • Doctor en Física (Max Planck Institut, Alemania).

Research Areas

  • Física del Sólido.
  • Física Médica.
  • Fisica Cuántica.

National and International Committees and Honors

  • “Un método para corregir las imágenes médicas en un estudio SPECT (Tomografía computacional por emisión de un fotón único), de un organo de un paciente, para su posterior reconstriuccion tomográfica”. Patente 44.274 concedida, válida hasta 18-12-2023.

Publications

2018
  1. A. León, E.A. Velásquez, J. Mejía-López, P.Vargas
    Ab initio study of the magnetic behavior of metal hydrides: A comparison with the Slater-Pauling curve
    Computational Materials Science 141, 122-126
  2. N. Sánchez-Marína, A. Cuchillo, M. Knobel, P. Vargas
    A phenomenological approach to study the effect of uniaxial anisotropy on the magnetization of ferromagnetic nanoparticles
    Journal of Magnetism and Magnetic Materials 452, 230-242
  3. C. Garcia, W.O. Rosa, J. Garcia, V.M. Prida, B. Hernando, J.A. López, P. Vargas, C.A. Ross
    Magnetization Reversal in Radially Distributed Nanowire Arrays
    J. Phys. Chem. C, 2018, 122 (9), pp 5124–5130

2017
  1. E.E. Vogel, P. Vargas, G. Saravia, J. Valdes, A.J. Ramirez-Pastor, P.M. Centres
    Thermodynamics of Small Magnetic Particles
    Entropy 2017, 19(9), 499
  2. F.J. Peña, A. González, A.S. Nunez, P.A. Orellana, R.G. Rojas, P. Vargas
    Magnetic Engine for the Single-Particle Landau Problem
    Entropy 2017, 19(12), 639
  3. F.J. Peña, A. González, A.S. Nunez, P.A. Orellana, R.G. Rojas, P. Vargas
    Magnetic Engine for the Single-Particle Landau Problem
    Entropy 2017, 19(12), 639
  4. Taichi Goto, Dong Hun Kim, Xueyin Sun, M.C. Onbasli, J.M. Florez, Shyue Ping Ong, P. Vargas, K. Ackland, P. Stamenov, N.M. Aimon, Mitsuteru Inoue, H.L. Tuller, G.F. Dionne, J.M.D. Coey, C.A. Ross
    Magnetism and Faraday Rotation in Oxygen-Deficient Polycrystalline and Single-Crystal Iron-Substituted Strontium Titanate
    Phys. Rev. Applied 7, 024006 | Published 8 Feb 2017
  5. A. León, P. Reuquen, C. Garín, R. Segura, P. Vargas, P. Zapata, P.A. Orihuela
    FTIR and Raman Characterization of TiO2 Nanoparticles Coated with Polyethylene Glycol as Carrier for 2-Methoxyestradiol
    Appl. Sci. 2017, 7(1), 49 | Published 4 Jan
  6. A. León, E.A. Velásquez, J. Mazo-Zuluaga, J. Mejía-López, J.M. Florez, P. Vargas
    Magnetic effects of interstitial hydrogen in nickel
    Journal of Magnetism and Magnetic Materials 421 (2017) 7–12; Published 1 Jan

2016
  1. F.J. Peña, M. Ferré, P.A. Orellana, R.G. Rojas, P. Vargas
    Optimization of a relativistic quantum mechanical engine
    Phys. Rev. E 94, 022109; Published 8 Aug 2016
  2. J.E. Valdés, P. Vargas, V.A. Esaulov
    Energy losses of slow ions traveling through crystalline solids and scattered on crystalline surfaces
    Radiation Effects & Defects in Solids, Vol 171, 60–76, Published (Web) 9 May 2016
  3. L. Tryputen, K-H. Tu, S.K Piotrowski, M. Bapna, S.A. Majetich, C. Sun, P.M. Voyles, H. Almasi, W. Wang, P. Vargas, J.S. Tresback, C.A. Ross
    Patterning of sub-50nm perpendicular CoFeB/MgO-based magnetic tunnel junctions
    Nanotechnology 27 (2016) 185302 (7pp); Published 6 May 2016

2015
  1. E.A. Velásquez, J. Mazo-Zuluaga, P. Vargas, J. Mejía-López
    Bridging the gap between discrete and continuous magnetic models in the scaling approach
    Phys. Rev. B 91, 134418; Published 15 April 2015

2013
  1. M. Flores, E. Cisternas, J.D. Correa, P. Vargas
    Moire patterns on STM images of graphite induced by rotations of surface and subsurface layers
    Chemical Physics 423, 49-54

2012
  1. J. M. Florez, S. P. Ong, M. C. Onbasli, G. F. Dionne, P. Vargas, G. Ceder, and C. A. Ross
    First-principles Insights on the Magnetism of Cubic SrTi1-xCoxO3-δ
    Applied Physics Letters 100, 252904

2013
  1. J.M. Florez, P. Vargas, C. Garcia, C.A. Ross
    Magnetic Entropy Change Plateau in a Geometrically Frustrated Layered System: FeCrAs-like Iron-Pnictide Structure as a Magnetocaloric Prototype
    Journal of Physics: Condensed Matter 25, 226004 (11)
  2. A.R. Canario, L. Guillemot, J. Diaz-Valdés, J. E. Valdés, P. Vargas and V.A. Esaulov
    Electron transfer and energy loss processes in fluorine scattering on oxygen covered Ag (110) – crystal azimuthal dependence
    Nuclear Instruments and Methods in Physics Research B315, 36
  3. J. A. Otálora, J. A. López-López, P. Landeros, P. Vargas and A. S. Núñez
    Breaking of chiral symmetry in vortex domain wall propagation in ferromagnetic nanotubes
    Journal of Magnetism and Magnetic Materials 341, 86

2012
  1. J. A. Otálora, J. A. López-López, P. Vargas, and P. Landeros
    Chirality switching and propagation control of a vortex domain wall in ferromagnetic nanotubes
    Applied Physics Letters 100, 72407

2013
  1. J. E. Valdés, C. Celedón, R. Segura, I. Abril, C. D. Denton, N. R. Arista, P. Vargas and R. Garcia-Molina
    Energy loss distribution of proton beams at normal incidence on multi-walled carbon nanotubes
    Carbon 52, 137-144

2009
  1. O. J. Suarez, P. Vargas, E. E. Vogel
    Energy and force between two magnetic nanotubes
    Journal of Magnetism and Magnetic Materials 321, 3658
  2. F. Llievski, A. Cuchillo, W. Nunes, M. Knobel, C. A. Ross, and P. Vargas
    Thermal behavior of hard-axis magnetization in noninteracting particles with uniaxial anisotropy
    Applied Physics Letters, 95 202503
  3. J. M. Florez, Álvaro S Núñez, P. Vargas
    Quantum tunneling in nanomagnetic systems with different uniaxial anisotropy order
    Nanotechnology 20, 465403
  4. J. M. Florez, P. Vargas, A. Núñez
    Instantons and magnetization tunneling:Beyond the giant-spin approximation
    Physica B 404, 2791

2010
  1. I. Kyriakou, C. Celedón, R. Segura, D. Emfietzoglou, P. Vargas, J. E. Valdés, I. Abril, C. D. Denton, K. Kostarelos, R. García-Molina
    Energy loss of protons in carbon nanotubes: Experiments and calculations
    Nuclear Instruments and Methods in Physics Research B 268 (2010) 1781–1785; Published Jun 2010
  2. L. Chen, J.E. Valdés, P. Vargas, V.A. Esaulov
    Surface channelling and energy losses of 4 keV hydrogen and fluorine ions in grazing scattering on Au(111) and missing row reconstructed Au(110) surfaces
    Journal of Physics: Condensed Matter 22, 345005 (11p)
  3. J. M. Florez, A. Núñez, C. García, P. Vargas
    Magnetocaloric features of complex molecular magnets: The (Cr/Ni)(2)Cu molecular magnet and beyond
    Journal of Magnetism and Magnetic Materials 268, 1781-1785
  4. C. García, J. M. Florez, P. Vargas and C.A. Ross
    Asymmetrical giant magnetoimpedance in exchange – biased
    Applied Physics Letters 96, 232501
  5. J.M. Florez, A. Núñez, P. Vargas
    Quenching points of dimeric single-molecule magnets: Exchange interaction effects
    Journal of Magnetism and Magnetic Materials 322, 3623
  6. E. Suárez Morell, J. D. Correa, P. Vargas, M. Pacheco, and Z. Barticevic
    Flat bands in slightly twisted bilayer graphene: Tight-binding calculations
    Phys. Rev. B 82, 121407

2011
  1. L. Chen, J. Shen, J. E. Valdés, P. Vargas, and V. A. Esaulov
    Energy loss of keV fluorine ions scattered off a missing-row reconstructed Au(110) surface under grazing incidence
    Physical Review A 83, 032901
  2. C. García, J. M. Florez, P. Vargas, C. A. Ross
    Effect of the exchange bias coupling strength on the magnetoimpedance of IrMn/NiFe films
    Journal of Applied Physics 109 07D735
  3. J. M. Florez, C. García and P. Vargas
    Thermal observables in coupled Cr7Ni molecular rings: Role and quantification of spin-entanglement
    Journal of Applied Physics 109 07B109
  4. L. Chen, J.E. Valdés, P. Vargas, J. Shen and V.A. Esaulov
    Energy losses of H and F ions in grazing scattering on a missing row reconstructed Au(110) surface
    Physica Scripta T144, 014042 (3pp)
  5. A. Núñez, E. Suarez, P. Vargas
    Trigonal Distortion of Topologically Confined Channels in Bilayer Graphene
    Applied Physics Letters 98, 262107
  6. J. Bragard, H. Pleiner, O. J. Suarez, P. Vargas, J.A.C. Gallas, and D. Laroze
    Chaotic dynamics of a magnetic nanoparticle
    Physical Review E, 84 037202

2012
  1. J.M. Florez, P. Vargas
    Factorizing magnetic fields triggered by the Dzyaloshinskii–Moriya interaction: Application to magnetic trimers
    Journal of Magnetism and Magnetic Materials 324 83-89

2011
  1. A.R. Fernandes, J.A. Otálora, P. Vargas, J. d’Alburquerque e Castro
    Oscillations in the Spatial Distribution of Current in Nanotubes and Nanowires
    Journal of Applied Physics 110, 093720(5)
  2. E. Suárez, P. Vargas
    Charge Redistribution and Interlayer Coupling in Twisted Bilayer Graphene under Electric Fields
    Physical Review B 84, 195421(5)

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