People at the Max Planck Graduate Center for Quantum Materials

• development of ab initio methods for treating correlated electronic systems, including quantum chemical and quantum Monte Carlo methods
• many-body perturbation theories
• superexchange antiferromagnetic coupling in cuprates
• spin chemistry of Fe-porphyrns
• development of time-dependent methods, i.e. time-propagation of correlated electronic systems using a stochastic propagation technique, inspired by the ground-state FCIQMC method

• effects of hard constraints in classical and quantum systems (dimer, vertex, and colouring models)
• kinematic constraints, out of equilibrium phenomena, freezing and glassiness
• frustrated magnetism, classical and quantum spin liquids
• entanglement, topological order, quantum information and quantum computing
• photoinduced phases of matter

• physics of strongly correlated electron systems
• light induced superconductivity
• control of magnetism and of correlated-electron (Mott) insulators
• nonlinear THz spectroscopy of Quantum Materials
• Dirac Carrier dynamics

• Theory of correlated quantum materials
• Collective electronic behaviour 
• Unconventional superconductivity
• Quantum criticality
• Field theory methods and emergent phenomena

• non-equilibrium dynamics of quantum materials
• coherent control and spectroscopy of quantum materials
• spin-orbit coupling and unconventional superconductivity
• new avenues in charge and spin manipulation at surfaces
• 2D van der Waals materials and oxide heterostructures

Davis Group research concentrates upon the fundamental physics of exotic states of electronic, magnetic and atomic quantum matter. A specialty is development of innovative instrumentation to allow direct atomic-scale visualization or perception of the quantum many-body phenomena that are characteristic of these states.

• electronic liquid crystals
• Cooper-pair density wave states
• monopole and spin liquids
• magnetic topological insulators
• Cu/Fe high-T_c superconductors
• viscous electron fluids
• macroscopic quantum mechanics
• quantum microscope development

• Nanomagnetism
• Magnetic topological textures and their dynamics
• Three-dimensional magnetic nanostructures
• Synchrotron X-ray magnetic microscopy
• Method development for vector imaging techniques

• artificial intelligence methods for materials science
• molecular switches on surfaces
• optoelectronic excitations at inorganic/organic interfaces
• organic semiconductors

• Heusler compounds with X₂YZ with L2₁ and XYZ with C1_b structure type
• topological insulators, Weyl semimetals, new Fermions
• thermoelectric materials, topological catalysis
• non-centrosymmetric superconductivity

• materials science and nanotechnology for quantum science and renewable energy harvesting
• epitaxial synthesis of novel materials
• synthesis and properties of free standing and interconnected 1D structures
• nanophotonics for efficient photon harvesting

• development of new preparation methods, in particular using the redox reactions
• analysis of chemical bonding, in particular using quantum chemical techniques in position space
• thermoelectric materials
• chemical catalysis on intermetallic compounds.

• structure and dynamics of quantum materials
• unconventional superconductivity
• metal-oxide interfaces and heterostructures
• interplay of spin-orbit coupling and correlations
• development of new spectroscopic methods

• nanoscale science and technology with a focus on the bottom-up paradigm
• atomic scale phenomena
• molecular engineering & photonics
• quantum materials & devices
• quantum sensing
• quantum dynamics
• nano-bio interfaces

• discovery of new functional solids by combining solid-state chemistry, molecular chemistry, and nanochemistry
• 2D materials and heterostructures
• photo(electro)catalysis
• topological materials
• electrochemical energy storage
• stimuli-responsive photonic nanostructures

• low temperature ordered states
• interacting electron mesoscopics
• thermodynamic and transport measurements on interacting electron systems

• exploring interfaces in complex electronic materials to create and understand new electronic systems, materials, and novel physical phenomena; investigating them for applications
• synthesizing complex oxide heterostructures on the atomic scale, studying the effects of lateral confinement on the nanometer scale to create lower dimensional, complex electronic systems
• understanding, designing, and using electronic properties of correlated electron systems
• exploring basic properties of matter on the atomic scale by using scanning probe techniques

• 2D materials and van der Waals heterostructures 
• Floquet topological insulators
• ultrafast optoelectronics and opto-spintronics
• on-chip THz spectroscopy
• coherent light-matter interaction

• quantum many-body theory
• strongly correlated electrons
• unconventional superconductivity
• topological quantum matter

• theory of quantum materials:
• collective phenomena
• new kinds of order 
• quantum dynamics

• Correlated and topological systems including heavy fermions, high-Tc and Dirac/Weyl/multifold materials
• 3D structural deformation in crystalline structures and its impact on quantum transport
• Size effects and shapin microstructured crystals
• Physical properties in high magnetic fields;
• Focused Ion Beam fabrication of quantum materials
• Prototyping of novel materials in applications

• spintronics
• nano-photonics
• topological materials
• neuromorphic devices

• Nuclear quantum effects in molecules, solids, liquids and interfaces
• Electron-phonon coupling in organic and inorganic systems
• Advanced simulations of vibrational spectroscopy techniques in liquid and solid state
• Structure search techniques aided by machine learning

• new exotic states of matter out of equilibrium: Topological materials
• QED-Chemistry and Materials
• fundamental aspects of Time-Dependent Density Functional Theory and Many-Body Perturbation Theory
• strong light-matter interactions and Optimal control Theory
• electronic and Thermal transport
• nanostructures: 2D materials, nanotubes
• code development: development of the first principles open-sorce project octopus

• photon-phonon interactions in organic materials
• plasmonics
• single-molecule quantum optics
• bio-photonics

Materials with strong electronic correlations are amongst the most intriguing topics at the forefront of research in condensed matter physics. On the one hand, they exhibit fascinating phenomena like quantum criticality and high-temperature superconductivity, bearing a high potential for applications. On the other hand, they are theoretically very appealing due to their limited understanding, even on the very fundamental level.

• cutting-edge numerical quantum field theoretical methods
• quantum critical systems
• high-temperature superconductors
• Mott insulators
• magnetically frustrated systems, both in the purely model (Hubbard model, periodic Anderson model) as well as material oriented (heavy fermions, cuprates, organics) context

• ab initio thermodynamics and statistical mechanics
• many-body electronic-structure theory and electron-phonon coupling
• electronic and thermal transport
• nuclear quantum effects in materials
• artificial intelligence methods for materials science

• New fermionic quasiparticles in chiral crystals
• Topological materials and interfaces
• Heterostructures for quantum devices

• Physics of correlated electrons in two-dimensional charge carrier systems
• Interfacial interactions in van der Waals heterostructures
• Electrochemically driven intercalation and ion transport in 2D materials and interfaces
• Topological phenomena in 2D electron systems
• Nuclear spin – electron spin interactions in low dimensional systems

• novel superconductors - discovery and mechanisms
• exploration of quantum spin liquids
• charge liquids on geometrically frustrated lattices
• pioneering novel electronic phases induced by spin-orbit interaction
• high performance thermoelectric materials

• electronic structure of strongly correlated systems
• metal-insulator and spin-state transitions, orbital physics
• transition metal oxides and rare-earth/uranium intermetallics
• MBE-grown oxide thin films and topological insulator interfaces
• development of new synchrotron-based x-ray spectroscopies

• quantum sensing techniques for material exploration
• nanoscale scanning magnetometry using nitrogen-vacancy centers
• superconducting quantum circuits
• hybrid quantum circuits with van der Waals heterostructures

• quantum spintronics
• nanoscale quantum sensing
• quantum information processing
• solid state quantum optics