Physicist · Universidad Nacional de Colombia
Jorge Alfredo Robles Calderón
Experimental physicist working on oxide materials and on the simulation of superconductors. Author of juliaTDGL, an open-source three-dimensional two-band Ginzburg–Landau solver; currently also on first-principles nonlinear optics of Weyl semimetals.
Interests: vortex matter and multiband superconductivity, structure–property relations in functional oxides, and light–matter response from first principles — with measurements and simulations checked against each other.
Lines of work
Laboratory
Zn₁₋ₓMgₓFe₂O₄ spinel ferrites
Combustion synthesis and multi-technique characterization of a Zn–Mg ferrite series, interpreted with GGA+U band structures: why the optical gap barely changes with composition.
Thesis and figures →Superconductivity
Two-band TDGL solver
Superconducting diodes and screening in two-gap samples, with a Julia solver verified against its reference, ~56 000 test assertions and 18 documented failure modes.
Findings →Light and matter
Nonlinear and computational optics
Photocurrents in magnetic Weyl semimetals from first principles (Octopus, Quantum ESPRESSO), and an open lensmeter built from a phone camera and a laptop screen. Both at an early stage.
Status →Software and data
Scientific and web applications
Open-source simulation software, a geospatial field-data platform with offline sync, data extraction with OCR and local language models, and production web sites.
Projects →Current work
- Methods paper on silent failure modes in 3D two-band TDGL simulation, published as a preprint on Zenodo (October 2026), with the open-source solver juliaTDGL 1.0.
- The geometric diode at MgB₂-like parameters — strong screening and separated coherence lengths — with Joule heating and interband drag; next, multiband and non-equilibrium TDGL for three-dimensional nanostructures.
- Nonlinear optics of Weyl semimetals from first principles: a validated real-time model, and a Quantum ESPRESSO → Wannier90 chain under way.
- An open computational lensmeter built from a phone camera and a laptop screen (design stage).
Availability
Open to funded master's or PhD positions in condensed matter physics — superconductivity, functional materials, optics — and to research or industry roles in scientific software, data and materials R&D; remote, hybrid or with relocation. Contact: georgeotjg@gmail.com.
