Welcome

The edoc server is the Open Access publication server and institutional repository of the Humboldt-Universität zu Berlin. It is available to university members for the publication of academic work as a first or second publication. In addition to text publications, research data can also be published via the edoc server. These publications are available to the general public worldwide, free of charge and for the long term.

The University Library supports and advises all members of the University in all matters relating to academic publishing:

If you have any questions, please contact the Open Access team or the Electronic Publishing working group.

Community and Collections

Select a community to browse its collections.

Recent Submissions

  • Item type: Publication ,
    2026-06-25Zeitschriftenartikel
    Enhanced mid-infrared light-matter coupling in heavily-doped p-germanium due to interplay between plasmonic and inter-subband contributions
    (Mathematisch-Naturwissenschaftliche Fakultät) Subramanian, Aravind N.; Bin Anooz, Saud; Pavlov, Sergey G.; Richter, Carsten; Szántó, Géza; Sidorova, Mariia; Petrik, Peter; Sumathi, R. Radhakrishnan
    The development of germanium-based mid-infrared (MIR) optoelectronic technologies is central to advancing compact, high-performance on-chip systems. While plasmonic field enhancement in heavily-doped semiconductors is widely exploited to intensify light-matter interactions, yet p- type germanium has been discarded due to its complex valence band structure. Here, we show that heavily-doped p- type germanium exhibits a dual light-matter interaction, where an ε-near-zero band delineates a plasmonic-like regime below the plasma frequency and a broadband absorption (dominated by inter-subband transitions) above it. This duality extends the spectral range of strong interaction beyond conventional Drude plasmonics. Using the Czochralski method, we have grown high-quality heavily-doped germanium single crystals with gallium concentrations up to ~2×10 20  cm −3 , exhibiting a high, near 100% acceptor activation. Mid-infrared spectroscopic ellipsometry and reflectance measurements reveal a continuous blue shift of the plasma wavelength with increasing dopant concentration, up to 4.5 μm, the shortest wavelength reported in Ge to date. Our findings manifest the potential of heavily-doped p- type bulk germanium crystals for applications that benefit from strong mid-infrared absorption and high crystal lattice quality.
  • Item type: Publication ,
    2026-06-22Zeitschriftenartikel
    Legal Frameworks, Political Discourse, and Media Representation of Latin American Migrant Men in Canada: A Scoping Review Protocol
    (Berliner Institut für Integrations- und Migrationsforschung) Sowad, Abu Saleh Mohammad; Clark, Nancy; Yurdakul, Gökce; Zakher, Bernadette
    Latin American migrant men occupy a structurally central position within Canada’s migration regime, yet scholarship on this population remains fragmented across migration studies, gender and masculinities research, labour policy, and media analysis. This scoping review aims to map and synthesize scholarship on how adult Latin American migrant men in Canada are constituted within legal and policy frameworks, and how these constructions are reproduced, contested, or transformed across parliamentary debate, civil society engagement, and media reporting. The review will follow the JBI methodology for scoping reviews and will be reported in accordance with PRISMA-ScR. Sources published in English, French, or Spanish from 2002 onwards will be included to reflect the implementation of the Immigration and Refugee Protection Act (IRPA) and subsequent transformations in migration governance. Eligible sources must address Latin American migrant men aged 18 years and older residing in Canada, including temporary foreign workers, permanent residents, refugees, asylum seekers, and undocumented migrants. A comprehensive search will be conducted across multidisciplinary academic databases, parliamentary archives, legal repositories, media databases, and grey literature sources, including Canada Commons, CanLII, EBSCO, HeinOnline, Lexis Advance Quicklaw, Nexis Uni, ProQuest, and SSRN. Two independent reviewers will complete title and abstract screening and full-text review, followed by structured data extraction using a standardized tool. Data will be analyzed descriptively and through qualitative content analysis, with findings presented in tabular and narrative formats, along with a PRISMA-ScR flow diagram. This review will generate the first integrated mapping of how Latin American migrant men are constructed and governed across legal, political, and media domains in Canada. Foregrounding masculinity as a category of governance, it provides a foundation for more coherent interdisciplinary research and evidence-informed policy analysis concerning racialized migrant men. The protocol is registered with the Open Science Framework ( https://doi.org/10.17605/OSF.IO/DEH4P ).
  • Item type: Publication ,
    2026-04-15Zeitschriftenartikel
    The Liberal Idea of Nondiscrimination in Access to the Labor Market and Its Support by Citizens in 26 Countries Around the World
    (Kultur-, Sozial- und Bildungswissenschaftliche Fakultät) Gerhards, Jürgen; Giesecke, Johannes
    The notion that jobs should be awarded on applicants’ qualifications and not on the basis of gender, ethnicity, religion, or family background is a key component of modern liberal societies. Drawing on a novel public opinion survey covering 26 countries from all regions of the world, we analyze the degree to which citizens support the idea that job recruitment should be based on applicants’ qualifications. To understand the variation in citizens’ attitudes toward nondiscrimination, we derive our hypotheses from two broader sociological theories: world society theory and modernization theory. We find strong support for the idea of nondiscrimination in almost all countries surveyed, and at the same time significant variation across the 26 countries, with support being highest in Chile, Latvia, and Sweden and lowest in India, Indonesia, Nigeria, and Türkiye. Modernization theory as well as world society theory contribute to better understanding of citizens’ attitudes, albeit to different degrees and mediated through different channels. Citizens living in countries more deeply embedded in world society are more likely to support the principle of nondiscrimination. On the individual level, it turns out that people’s level of education and their general commitment to the norms of a global culture are associated with support for nondiscrimination. With regard to modernization theory, we find that a country’s level of modernization does not directly impact nondiscrimination attitudes, but many of the individual features derived from modernization theory do because individuals who are better educated and more secularized and those holding postmaterial values are more likely to support the nondiscrimination norm.
  • Item type: Publication ,
    2026-06-17Zeitschriftenartikel
    Intramolecular Al/P Frustrated Lewis Pairs Based on an Indoline Backbone - Two Reaction Sites for Small Molecule Activation and Hydrodefluorination
    (Mathematisch-Naturwissenschaftliche Fakultät) Biswas, Sanjay; Wolff, Siad; Cula, Beatrice; Limberg, Christian
    The synthesis of compounds of the type Ph2P(Ind)AlX2 (with Ind = indoline and X = Cl, I, Me, and C6F5) is reported. They can be accessed starting from the 7-diphenylphosphino indoline via deprotonation and subsequent salt metathesis or via in situ deprotonation using precursors with basic ligands. While in the case of X = Me, X-ray crystallographic and solution studies confirmed that the connectivity and configuration are as envisaged, the latter was only true in the case of X = C6F5 for the solid state. In solution, ligand scrambling was observed, as was for the representatives with X = I and Cl, which unlike the organometallic derivatives were found to have a dimeric structure. The dimers in solution are partly forming the scrambled compounds [Ph2P(Ind)]2AlX. However, upon contact with donors (D), all compounds were found to react as Ph2P(Ind)AlX2, forming Ph2P(Ind)AlX2(D). The reactivities of the representatives with X = Me and C6F5 were investigated, showing that diazo compound Ph2CN2 can be activated in the Al/P reaction space, while CO2 reacts with the aluminum-amide unit to give carbamates. The Al–N units can also be used to perform the dehydrofluorination of fluorocyclohexane. Subsequent investigations showed that achieving this reaction with alanes requires a fine balance and cooperation between a sufficiently Lewis-acidic aluminum center and a basic ligand.
  • Item type: Publication ,
    2026-04-14Zeitschriftenartikel
    Prompt engineering of large language models for paper screening in medical meta-analyses and systematic reviews: A prospective comparative study
    (Lebenswissenschaftliche Fakultät) Adam, Till J.; Abosabie, Salma A. S.; Dittmer, Max; Wolf, Elise; Abosabie, Sara A.; Behnke, Clara; Baier, Felix; Weickmann, Annabelle; Köser, Ludwig; Correll, Christoph U.; Rutsch, Niklas
    Interest in large language models (LLMs) as a tool for meta-analyses and systematic reviews (MA/SRs) is growing. We prospectively developed 515 unique prompts by predefined screening-related categories and tested with open-access LLMs (Llama, Mistral) against four gold-standard MA/SRs from different medical fields published after the LLMs’ training cut-offs, using a Python-based pipeline. Heterogeneity between prompts was quantified, and hypothetical workload/cost reduction with top-performing prompts calculated. Across 12,360 pipeline runs, LLMs versus MA/SRs reached average recall/sensitivity = 83.6 ± 17.0%, precision = 18.5 ± 15.6%, specificity = 36.6 ± 23.7% F1-score = 27.6 ± 17.2%, and accuracy = 61.1 ± 11.0%. F1-scores were significantly higher when prompts focused on methods (0.78 ± 0.40%), explicitly mentioned MA/SR screening (0.81 ± 0.37%), included the comparison MA/SR’s title (5.64 ± 0.37%) or selection criteria (8.05 ± 0.68%), and with more LLM parameters (70b = 4.48 ± 0.31%, 123b = 7.77 ± 0.31%), but lower when screening abstracts instead of titles (−3.67 ± 0.28%). In LLM-base preselection, top-performing F1-score prompts (recall/sensitivity = 72.2%, specificity = 66.1%, precision = 28.6%) would reduce screening demands by 34.5%−37.5%, saving 8.4–8.8 weeks of work and 17,592–18,552. Recall/sensitivity increased with less MA/SR information contrasting F1-score results, which highlights a recall/sensitivity-precision/specificity trade-off. F1-score increased with detailed MA/SR information, while recall/sensitivity increased with shorter, zeroshot prompts. We provide the first prospectively assessed prompt engineering framework for early-stage LLM-based paper screening across medical fields. The publicly available Python pipeline and full prompt list used here support further development of LLM-based evidence synthesis.