Alex Bretaña, PhD

Director's Postdoctoral Fellow at Savannah River National Laboratory
  • Claim this Profile
Contact Information
us****@****om
(386) 825-5501
Location
North Augusta, South Carolina, United States, US

Topline Score

Topline score feature will be out soon.

Bio

Generated by
Topline AI

You need to have a working account to view this content.
You need to have a working account to view this content.

Experience

    • United States
    • Research Services
    • 300 - 400 Employee
    • Director's Postdoctoral Fellow
      • Jul 2022 - Present

      -2022 Science Education Enrichment Day (SEED) Volunteer -2022 Science Education Enrichment Day (SEED) Volunteer

    • United States
    • Higher Education
    • 700 & Above Employee
    • PHD Candidate
      • Aug 2016 - May 2022

      Awarded Boain Ph.D. Dissertation Award and the Physics Leaders AwardRESEARCH• Analyzed simulation data and theoretical predictions together with existing experimental data and demonstrated the appearance of spontaneous cluster formation in stoichiometric CeRu2Si2 and YbRh2Si2. Explained how magnetic cluster formation accounts for the observed low temperature non-Fermi Liquid behavior seen in these systems. Opened the field of spontaneous cluster formation to any strongly correlated electron system with changes in interatomic spacings. Demonstrated high-Tc layered cuprates are such a system and speculated ionic displacements associated with hole doping leads to a pathway for the formation of Cooper Pairs providing an explanation for the many experimental observations, such as the striped phase and hourglass dispersion. Developed a distribution of Kondo shielding temperatures based on a Gaussian distribution in interionic separations.• Developed Monte Carlo simulations to study phase transitions using a new percolation model called protected percolation. Established protected percolation falls into a new universality class and proved the Harris Criterion is violated. Demonstrated the effects of disorder in such a model and shown its relevance to quantum critical systems.• Trained to grow large single crystals in an optical floating zone furnace. Assembled and operated a SA-200 arc melter, as well as designed and retrofitted a glove box enclosure to house the arc melter to weigh, handle, and melt under inert atmosphere for oxygen sensitive materialsPRESENTATIONS• “Spontaneous Cluster Formation in Stoichiometric Quantum Critical Systems,” CM/BIO/EECS Seminar Series, University of Missouri, October 2021• “The appearance of spontaneous disorder in disorder-free systems”, Physics Leaders Meeting, Department of Physics, University of Missouri, April 2021•“Percolation Physics in doped and stoichiometric Quantum Critical Systems”, APS March Meeting, 2020 Show less

    • Graduate Teaching Assistant
      • Aug 2016 - May 2022

      Awarded the Harry E. Hammond Award for excellence in undergraduate teaching, 2017• Instructing labs, leading discussions, review sessions, covering lectures and grading for • Physics 1210: College Physics 1 (300 students) • Physics 1220: College Physics 2 (300 students) • Physics 2750: University Physics 1 (300 students) • Physics 2760: University Physics 2 (300 students)

    • Laboratory Supervisor - Introductory Physics Labs
      • Jan 2018 - Dec 2019

      • Design, construction, weekly equipment setup, equipment maintenance, repair, and ordering for labs in Physics 1210, 1220, 2750, and 2760• Redesigned Physics 1210 Labs with Active learning strategies and principles with Dr. Karen King• Led Lab Safety and Equipment training for new graduate students

    • United States
    • Higher Education
    • 700 & Above Employee
    • Planetarium Student Director
      • 2014 - 2016

      • Operating the Planetarium Outreach program at University of Missouri – St. Louis• Designed, advertised, and hosted Planetarium presentations for local schools and clubs using Spitz Starball and Sci-Dome Projectors and software• Increased attendance from 20 students in Spring 2014 to 95 students in Spring 2015 to 454 students in Spring 2016 - over 2000% increase in total number of students• Funded by the NASA/Missouri Space Grant Consortium 2014-16PRESENTATIONS• “Planetarium Outreach Program”, 25th Annual NASA/Missouri Space Grant Consortium, Rolla, Missouri, April 2016• “Astronomy Outreach Program”, 24th Annual NASA/Missouri Space Grant Consortium, Rolla, Missouri, April 2015 Show less

    • Teaching Assistant
      • Jan 2015 - Dec 2015

      • Instructing labs, leading discussions, review sessions and grading for Astronomy 1001 (30 Students) and Astronomy 1011 (150 Students)

Education

  • University of Missouri-Columbia
    Doctor of Philosophy - PhD, Physics
    2020 - 2022
  • University of Missouri-Columbia
    Master of Science - MS, Physics
    2016 - 2020
  • University of Missouri-Saint Louis
    Bachelor of Science - BS, Physics
    2011 - 2016

Community

You need to have a working account to view this content. Click here to join now