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Article
Open AccessInterplay of hidden orbital order and superconductivity in CeCoIn5
Visualizing atomic-orbital degrees of freedom is a frontier challenge in scanned microscopy. Some types of orbital order are virtually imperceptible to normal scattering techniques because they do not reduce t...
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Article
Open AccessMulti-atom quasiparticle scattering interference for superconductor energy-gap symmetry determination
Complete theoretical understanding of the most complex superconductors requires a detailed knowledge of the symmetry of the superconducting energy-gap ...
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Chapter and Conference Paper
Usability Study of an Innovative Application in Public Transport by Using Hardware-Based Security Technology
As part of the OPTIMOS 2.0 funding project of the German Federal Ministry for Economic Affairs and Energy (BMWi), a partner develops the TicketIssuance app for secure hardware-based storage of high-priced tick...
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Article
Open AccessTopological ultranodal pair states in iron-based superconductors
Bogoliubov Fermi surfaces are contours of zero-energy excitations that are protected in the superconducting state. Here we show that multiband superconductors with dominant spin singlet, intraband pairing of s...
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Chapter and Conference Paper
Acceptance and Diffusion of Services Based on Secure Elements in Smartphones – Study Design and First Results of the Pretests
With the increasing spread of digital services and apps, the risk and damage potential of attacks and identity theft increases. In addition, there are services, such as season tickets on public transport, tha...
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Article
Anisotropic spin fluctuations in detwinned FeSe
Superconductivity in FeSe emerges from a nematic phase that breaks four-fold rotational symmetry in the iron plane. This phase may arise from orbital ordering, spin fluctuations or hidden magnetic quadrupolar ...
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Chapter and Conference Paper
Business and Billing Models for Mobile Services Using Secure Identities
Worldwide, strongly increasing trends towards the use of mobile ser...
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Chapter and Conference Paper
Development of a Concept for Evaluation User Acceptance and Requirements for NFC Based E-ticketing in Public Transport
In frame of OPTIMOS project (Open, Practical Infrastructures for Mobile Services) an open practical ecosystem based on Near Field Communication (NFC) will be developed and demonstrated by different implemented...
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Article
Superconducting Phase Diagram of the Paramagnetic One-Band Hubbard Model
We study spin-fluctuation-mediated superconductivity in the one-band Hubbard model. Higher-order effective interactions in U give rise to a superconducting instability which is very sensitive to changes in the Fe...
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Chapter and Conference Paper
NFC-Enabled eTicketing in Public Transport – Aims, Approaches and First Results of the OPTIMOS Project
The comprehensive digitalization of the economy requires efficient actions from all market partners involved. This also applies to public transport sector. Proprietary solutions and closed systems are ineffici...
