Emergent Relativistic Effects in Condensed Matter
From Fundamental Aspects to Electronic Functionality
Project Area
B
Spin-Orbit Interaction Effects

Project B01

F. Evers
J. Repp

Topological states in individual molecules

In a combined effort of scanning-probe experiments and computational theory we investigate the low-energy spectrum of spin and charge excitations in broad classes of polyradicals immobilized on insulating substrates. Of interest is the interplay of zero-energy modes of topological origin with bond-length patterns and the resulting possibility of soliton creation, manipulation and detection. A particular focus will be the generation of excitons, t... | show all >> show all members>>

 

Project B02

A. Donarini
J. Repp
R. Huber

Spin-orbit induced dynamics in atomic scale systems

Based on lightwave-driven scanning tunnelling microscopy, atomic-scale femtosecond slow-motion pictures of spin-orbit induced electron dynamics are targeted in individual molecules and native defects in transition metal dichalcogenide monolayers. These experiments may also enable the first spatiotemporal resolution of moiré excitons. The corresponding theoretical description will directly proceed in the time domain with the help of generalized m... | show all >> show all members>>

 

Project B03

J. Lupton
S. Bange

Spin-orbit coupling in organic semiconductors

Electronic spins in organic semiconductors are only minimally perturbed by spin-orbit interactions, their g-factors being almost identical to that of a free electron. The g-factor can be measured accurately under magnetic resonance, but the resolution of the experiment is limited by the strong hyperfine coupling arising from the abundant hydrogen atoms. A high-frequency magnetic resonance technique will be developed, operating close to THz freque... | show all >> show all members>>

 

Project B04

N. Paradiso
M. Marganska
C. Strunk
M. Grifoni

Spin-orbit interaction and superconductivity in hybrid 1D-2D van derWaals heterostructures

Our goal is to study, both theoretically and experimentally, how spin-orbit coupling affects the supercurrent and the superconducting topological phase in hybrid 1D-2D van der Waals heterostructures based on carbon nanotubes proximitized by NbSe2. We shall also study the interplay of the mutually perpendicular spin orbit fields in the 1D and 2D components of our hybrids, i.e. carbon nanotubes and NbSe2 and other few-layer transition metal dichalc... | show all >> show all members>>

 

Project B05

A. Chernikov
C. Schüller

Spin-valley dynamics in monolayer semiconductors and their heterostructures: Optical transport and low-frequency Raman spectroscopy

The project is focused on the spin-valley physics in transition-metal dichalcogenide monolayers and heterostructures, studied over a broad energy range, from excitonic quasiparticles at optical frequencies to low-energy electronic and vibronic excitations. The interplay between spatial propagation of excitons and their spin-valley polarization degree of freedom will be studied via time- and spatially resolved photoluminescence experiments, while ... | show all >> show all members>>

 

Project B07

J. Fabian

Interplay of spin-orbit coupling and magnetism in 2D materials

This theoretical project aims at exploiting different transport modes supported by novel two dimensional van der Waals heterostructures, using DFT and phenomenological methods. The WPs are structured to find implications---in lateral and vertical transport---of the spin interactions (exchange and spin-orbit coupling), but also at modifying them by gating. The scope covers spin-orbit torques, magnetic tunnel junctions, and resonant scattering in f... | show all >> show all members>>

 

Project B08

C. Strunk
N. Paradiso

Spin-orbit effects in the supercurrent response of superconducting heterostructures and Josephson junctions

The project aims at a deeper understanding of spin-orbit interaction (SOI) effects in super­conduc­tivity both in epitaxial Al/InAs-heterostructures an nanopatterned arrays of Josephson junc­tions based on these heterostructures. In addition, we will study the supercurrent response and spon­taneous supercurrents in other quasi-two-dimensional films combining strong SOI and supercon­ductivity. Besides standard transport measurements, we will ... | show all >> show all members>>

 

Project B09

M. Grifoni
J. Schliemann

Topological phases and spin-orbit effects in driven superconductors

To which extent can intense driving fields be used to generate, steer and/or characterize nontrivial superconducting phases? In the first part of the project we shall focus on the potential of Floquet band engineering to induce topological superconducting phases in 2D systems with strong Rashba and/or Ising spin-orbit coupling. In the second part we shall look at transport set-ups, with the objective of identifying specific signatures of Ising su... | show all >> show all members>>

 

Project B10

I. Gierz-Pehla
S. Refaely-Abramson

Ultrafast charge and spin transfer in van-der-Waals heterostructures

The occurrence of ultrafast charge separation following photoexcitation of different van der Waals heterostructures can be traced back to the band alignment. The relevant microscopic scattering channels, however, remain poorly understood. In this project, we will combine time- and angle-resolved photoemission spectroscopy – a technique that allows us to investigate ultrafast charge transfer processes with unprecedented detail – with ab initio... | show all >> show all members>>

 

Project B11

K. Lin
J. Vogelsang
J. Fabian

Spin-valley polarized excitonic three-level system for quantum interference in monolayer transition metal dichalcogenides

Quantum interference phenomena in light-matter interaction promise novel functionalities in optoelectronic technologies, which is challenging to achieve with dilute atomic gasses or defects but conceivable with monolayer transition metal dichalcogenides (TMDCs). The project will investigate atom-like and spin-valley polarized excitonic three-level systems in TMDC monolayers both experimentally and theoretically. We will map out the energies of th... | show all >> show all members>>

 

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SFB 1277
Doris Meier
Universität Regensburg

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