26 citations · 196 across the 16 of their papers we have counts for
16 papers
Triplet superconductivity in the Rashba model
G. A. H. Schober, M. Salmhofer
The Rashba model is a lattice model of interacting fermions with a tight-binding dispersion relation that exhibits four Rashba band crossing points at the same energy. The ferm…
Truncated-Unity Parquet Equations: Application to the Repulsive Hubbard Model
C. J. Eckhardt, G. A. H. Schober, J. Ehrlich +1
The parquet equations are a self-consistent set of equations for the effective two-particle vertex of an interacting many-fermion system. The application of these equations to bulk…
Truncated unity functional renormalization group for multiband systems with spin-orbit coupling
G. A. H. Schober, J. Ehrlich, T. Reckling +1
Although the functional renormalization group (fRG) is by now a well-established method for investigating correlated electron systems, it is still undergoing significant technical…
Wavevector-dependent optical properties from wavevector-independent proper conductivity tensor
Ronald Starke, Giulio A. H. Schober, René Wirnata +1
We discuss the calculation of the refractive index by means of the ab initio scalar dielectric function and point out its inherent limitations. To overcome these, we start from the…
Why history matters: ab initio rederivation of Fresnel equations confirms microscopic theory of refractive index
R. Starke, G. A. H. Schober
We provide a systematic theoretical, experimental, and historical critique of the standard derivation of Fresnel's equations, which shows in particular that these well-established…
General form of the full electromagnetic Green function in materials physics
G. A. H. Schober, R. Starke
In this article, we present the general form of the full electromagnetic Green function which is suitable for the application in bulk materials physics. In particular, we show how…
Linear electromagnetic wave equations in materials
R. Starke, G. A. H. Schober
After a short review of microscopic electrodynamics in materials, we investigate the relation of the microscopic dielectric tensor to the current response tensor and to the full el…
Covariant Response Theory and the Boost Transform of the Dielectric Tensor
R. Starke, G. A. H. Schober
After a short critique of the Minkowski formulae for the electromagnetic constitutive laws in moving media, we argue that in actual fact the problem of Lorentz-covariant electromag…
Ab initio electronic structure and optical conductivity of bismuth tellurohalides
Sebastian Schwalbe, René Wirnata, Ronald Starke +2
We investigate the electronic structure, dielectric and optical properties of bismuth tellurohalides BiTeX (X = I, Cl, Br) by means of all-electron density functional theory. In pa…
Ab initio materials physics and microscopic electrodynamics of media
R. Starke, G. A. H. Schober
We argue that the amazing progress of first-principles materials physics necessitates a revision of the Standard Approach to electrodynamics of media. We hence subject this Standar…
Response Theory of the Electron-Phonon Coupling
R. Starke, G. A. H. Schober
This article presents a systematic theoretical enquiry concerning the conceptual foundations and the nature of phonon-mediated electron-electron interactions. Starting from the fun…
Tight-binding Rashba model and statistical field theory
G. A. H. Schober, K. -U. Giering, M. M. Scherer +2
This document contains information supplementary to the article [1], but it is self-contained and can be read independently as a pedagogical review. In the first part, we explain o…
Microscopic Theory of the Refractive Index
R. Starke, G. A. H. Schober
We examine the refractive index from the viewpoint of modern first-principles materials physics. We first argue that the standard formula, $n^2 = \varepsilon_{\mathrm r} μ_{\mathrm…
Functional renormalization and mean-field approach to multiband systems with spin-orbit coupling: Application to the Rashba model with attractive interaction
G. A. H. Schober, K. -U. Giering, M. M. Scherer +2
The functional renormalization group (RG) in combination with Fermi surface patching is a well-established method for studying Fermi liquid instabilities of correlated electron sys…
Relativistic covariance of Ohm's law
R. Starke, G. A. H. Schober
The derivation of Lorentz-covariant generalizations of Ohm's law has been a long-term issue in theoretical physics with deep implications for the study of relativistic effects in o…
Functional Approach to Electrodynamics of Media
R. Starke, G. A. H. Schober
In this article, we put forward a new approach to electrodynamics of materials. Based on the identification of induced electromagnetic fields as the microscopic counterparts of pol…