Workshop on Next Generation Quantum Materials

Start time: April 4, 2016

Ends on:  April 8, 2016

Location: São Paulo, Brazil



  • Liliana Arrachea (ICAS-Universidad de San Martin, Argentina)
  • Richard Martin (Stanford University, USA)
  • Eduardo Miranda (UNICAMP, Brazil)
  • Renata Wentzcovitch (University of Minnesota, USA)

Steering committee

  • Lucy Assali (Universidade de São Paulo, Brazil)
  • Carlos Balseiro (Centro Atomico Bariloche, Argentina)
  • Nandini Trivedi (Ohio State University, USA)

Invited speakers:

Superconductivity & Quantum Magnetism & Strongly Correlated Systems 
  • Eric C. e Andrade (IFSC – São Carlos, Brazil)
  • Marcos Ávila (Universidade Federal do ABC, Brazil)
  • Carlos Balseiro (Centro Atómico Bariloche, Argentina)
  • Alberto Camjayi (Universidad de Buenos Aires, Argentina)
  • Jose Hoyos (USP-São Carlos, Brazil)
  • Caio Lewenkopf (Universidade Federal Fluminense, Brazil)
  • Ana M. Llois (CONICET – Centro Atomico Constituyentes, Argentina)
  • Eduardo Miranda (UNICAMP, Brazil)
  • Philip W. Phillips (University of Illinois at Urbana-Champaign, USA)
  • Tatiana G. Rappoport (Universidade Federal do Rio de Janeiro, Brazil
  • Eduardo Granado Monteiro da Silva (UNICAMP, Brazil)
  • Luis Gregório Dias da Silva (USP – São Paulo, Brazil)
  • Veronica Vildosola (CONICET – Centro Atomico Constituyentes, Argentina)

Electronic Structure

  • Pablo Cornaglia (Centro Atómico Bariloche, Argentina)
  • Emanuel Gull (University of Michigan, USA)
  • Jan Kunes (Academy of Sciences Czek Republic)
  • Richard Martin (Stanford University, USA)
  • Francesco Sottile (European Theoretical Spectroscopy Facility (ETSF) – Paris, France)
  • Lucas K Wagner (University of Illinois at Urbana-Champaign, USA)

Topological Systems

  • Liliana Arrachea (Universidad de Buenos Aires, Argentina)
  • Alejandro Lobos (Universidad de Rosario, Argentina)
  • Gonzalo Usaj (Centro Atómico Bariloche, Argentina)
  • Jan Zaanen (University of Leiden, The Netherlands)

 High Pressure studies of strongly correlated materials

  • Xiao-Jia Chen (HPSTAR – Beijing, China)
  • Pascoal Pagliuso (UNICAMP, Brazil)
  • Sandro Scandolo (ICTP-Trieste, Italy)
  • Renata M Wentzcovitch (University of Minnesota, USA)


Quantum mechanical effects play a defining role in materials properties exploited by modern technologies. The electronic energy level organization in solids with weakly interacting electrons distinguishes conductors from insulators. The semiconductor electronics revolution resulted from the manipulation of materials poised between these limits whose conducting properties could be easily tipped one way or another by small gate voltages. A similar revolution is offered by manipulating properties of materials with strongly interacting electrons. An example was the discovery and application of giant magneto-resistance (GMR), summarized in the New York Times headline, “Physics of Hard Drive Wins Nobel”(D. Overbye, N.Y. Times, October 10, 2007). Equally significant has been the discovery that in addition to symmetry, topology plays a crucial role in the nature of the quantum phase. The discovery of 2D topological insulators has recently been followed by the proposal of additional topological systems, including 3D topological systems, topological superconductors, and Weyl semimetals.

This workshop aims to bring together researchers from the condensed matter and materials communities simulating quantum materials but using traditionally different approaches: a) ab initio density functional based calculations and b) spin and multi-orbital Hamiltonian models. The discovery of high Tc cuprate superconductors three decades ago exposed limitations of methods used by both communities and motivated a wealth of developments aiming to address the multi-level complexity of these materials. Since then, effective ab initio methods for strongly correlated materials have been developed and Hamiltonian models have incorporated considerably more ingredients and complexity. These two communities are no longer separated by their distinct approaches but are integrated by the common issues they address. The workshop also aims to emphasize high pressure research as a means to manipulate interaction strengths and uncover quantum phase behavior.

Representative topics in this workshop include:

1) simulation methods for strongly correlated materials (ab initio and Hamiltonian models)

2) Superconductivity (cuprates and iron pnictides and chalcogenides)

3) Topological insulators

4) Giant magnetoresistance materials

5) High pressure and temperature studies (spin crossovers in earth minerals, cobaltites, superconductivity, etc)




List of Confirmed Participants: Updated on April 4



Workshop Program: updated on April 4

Click on the title of the talks to watch the videos

Monday, April 4 – Session 1 – Chair: Liliana Arrachea
12:30 13:30 Registration
13:30 13:45 Opening
13:45 14:30 Carlos Balseiro  Photoelectrons Unveil Topological Transitions in Graphene like Systems PDF
14:30 15:15 Tatiana Rappoport Real-Space Calculation of the Conductivity Tensor for Disordered Topological Matter PDF
15:15 16:00 Luis G. Dias da Silva How to distinguish between Majorana and Kondo signals in a quantum dot-topological quantum wire junction? PDF
16:00 16:30 COFFEE BREAK
16:30 17:15 Gonzalo Usaj Floquet topological insulators:  materials engineering by driving PDF
Tuesday, April 5 – Session 2 – Chair: Carlos Balseiro
9:30 10:15 Liliana Arrachea Unveiling a crystalline topological insulator in a Weyl semi-metal with time-reversal symmetry PDF
10:15 11:00 Ana Maria Lois (New?) Low dimensional systems:  richness and diversity of their electronic properties ( video at 0:50:00) PDF
11:00 11:15 COFFEE BREAK
11:15 12:00 Alejandro Lobos Haldane phase and magnetic end-states in 1D topological Kondo insulators PDF
12:00 12:45 Eduardo Miranda Emergent symmetries in disordered quantum spin chains PDF
12:45 14:45 LUNCH
Session 3 – Chair: Eduardo Miranda
14:45 15:30 Jan Kunes Excitonic magnetism in models and materials PDF
15:30 16:15 José A. Hoyos Neto Criticality and quenched disorder: rare regions vs. Harris criterion PDF
16:15 17:00 COFFEE BREAK
17:00 17:45 Caio Lewenkopf Transport properties of three-dimensional Weyl semimetals near a Weyl node PDF
17:45 18:30 Eric de Andrade Magnetic moments and non-Fermi-liquid behavior in quasicrystals PDF
Wednesday, April 6 – Session 4 – Chair: 
 9:30 10:15 Eduardo Granado
Exotic magnetism in 5d ordered double perovskites PDF
10:15 11:00 Pablo Cornaglia Why are the Co-based 115 compounds different? The case study of GdMIn5 (M=Co,Rh,Ir) PDF
 11:00 11:15  COFFEE BREAK
 11:15 12:00 Veronica Vildosola Spin density wave instabilities in the NbS2 monolayer  PDF
 12:00 12:45 Marcos Ávila Simplicity vs. complexity in thermoelectric quantum materials:  the cases of FeGa3 and RT2Zn20  PDF
 12:45 14:00  LUNCH
 14:00 15:15 Jan Zaanen IFT-Colloquium: Holographic Duality, Strange Metals and Entanglement (video 2)  PDF
   Session 5 – Chair: Lucy V. C. Assaly  
15:30 19:00 Poster Session 
19:00 Social Dinner  (TBA)
Thursday, April 7 – Session 6 – Chair: Renata Wentzcovich
9:30 10:15 Richard Martin Using idealized models and basic concepts to guide and interpret quantitative calculations PDF
10:15 11:00  Emanuel Gull Solutions of the Two Dimensional Hubbard Model: Benchmarks and Results from a Wide Range of Numerical Algorithms PDF
11:00 11:15 COFFEE BREAK
11:15 12:00  Lucas Wagner Ab initio quantum Monte Carlo for strongly correlated systems PDF
12:00 12:45  Francesco Sottile Signatures of correlation: from excitons to satellites  PDF
12:45 14:45 LUNCH
  Session 7 – Chair: Emanuel Gull   
 14:45 15:30 Pascoal Pagliuso Combined external pressure and chemical substitution studies on BaFe2As2 single crystals PDF
 15:30 16:15  Alberto Camjaya GaTa4Se8: a new prototype of 3D Mott-Hubbard physics PDF
 16:15 17:00 COFFEE BREAK
 17:00 17:45  Sandro Scandolo Magnetism and phase transitions in compressed Oxygen PDF
 17:45 18:30  Renata Wentzcovitch Spin crossover in iron bearing mantle minerals: some geophysical consequences PDF
  Friday, April 8 – Session 8 – Chair: Richard Martin 
9:30 10:15 Xiao-Jia Chen Superconductivity in Complex Electronic Systems under Pressure PDF
10:15 11:00 Philip Phillips Unparticles and Anomalous Dimensions in the Strange Metal Phase of the Cuprates PDF
11:00 11:15 COFFEE BREAK
11:15 12:00 Jan Zaanen Strange metals, fermion signs, and entanglement PDF
12:00 14:00 LUNCH
14:45 Departure


Additional Information:


Registration: ALL participants and speakers should register. The registration will be on April 4  at the institute, from 12:45 to 13:45.  You can find arrival instruction at

Accommodation: Participants and Speakers whose accommodation has been provided by the institute will stay at The Universe Flat. Each participant/speaker, whose accommodation has been provided by the institute, has received the accommodation details individually by email.

Poster presentation: Participants who are presenting a poster MUST BRING THE POSTER PRINTED. The poster size should be at most 1,5m x 1m. Please do not bring hanging banner, only sticking poster.

Emergency number: 9 8233 8671 (from São Paulo city); +55 11 9 8233 8671 (from abroad), 11 9 8233 8671 (from outside São Paulo).

Ground transportation instructions: 

Ground transportation from Guarulhos Airport to The Universe Flat

Ground transportation from Congonhas Airport to the Universe Flat

Ground transportation from The Universe Flat to the institute