Search Results - "Frenzel, A."
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Semiconducting-to-metallic photoconductivity crossover and temperature-dependent Drude weight in graphene
Published in Physical review letters (01-08-2014)“…We investigate the transient photoconductivity of graphene at various gate-tuned carrier densities by optical-pump terahertz-probe spectroscopy. We demonstrate…”
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Soliton superlattices in twisted hexagonal boron nitride
Published in Nature communications (25-09-2019)“…Properties of atomic van der Waals heterostructures are profoundly influenced by interlayer coupling, which critically depends on stacking of the proximal…”
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Trion-induced negative photoconductivity in monolayer MoS2
Published in Physical review letters (17-10-2014)“…Optical excitation typically enhances electrical conduction and low-frequency radiation absorption in semiconductors. We, however, observe a pronounced…”
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Nanosized BiOX (X = Cl, Br, I) Particles Synthesized in Reverse Microemulsions
Published in Chemistry of materials (06-02-2007)“…Reverse microemulsions, consisting of heptane, nonionic surfactants, and aqueous salt solutions, were used to synthesize BiOX (X = Cl, Br, I) nanoparticles…”
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Multidisciplinary optimization of automotive mega-castings merging classical structural optimization with response-surface-based optimization enhanced by machine learning
Published in Scientific reports (07-12-2023)“…Large high pressure die castings (HPDC), recently referred to as mega-castings, can replace plenty of steel metal sheets usually employed for body-in-white…”
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Power-Law Scaling Relating the Average Charge State and Kinetic Energy in Expanding Laser-Driven Plasmas
Published in Physical review letters (20-09-2024)“…A universal power-law scaling z[over ¯]∝E^{0.4} in the correlation between the average ion charge state z[over ¯] and kinetic energy E in expanding…”
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Spin-induced optical conductivity in the spin-liquid candidate herbertsmithite
Published in Physical review letters (18-09-2013)“…We report a direct measurement of the low-frequency optical conductivity of large-area single-crystal herbertsmithite, a promising spin-liquid candidate…”
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Effect of classroom air quality on students' concentration: results of a cluster-randomized cross-over experimental study
Published in Indoor air (01-10-2012)“…To assess the effect of indoor air quality as indicated by the median carbon dioxide (CO2) level in the classroom on the concentration performance (CP) of…”
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Artifact free time resolved near-field spectroscopy
Published in Optics express (13-11-2017)“…We report on the first implementation of ultrafast near field measurements carried out with the transient pseudoheterodyne detection method (Tr-pHD). This…”
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Exploring ITM2A as a new potential target for brain delivery
Published in Fluids and barriers of the CNS (21-03-2022)“…Integral membrane protein 2A (ITM2A) is a transmembrane protein expressed in a variety of tissues; little is known about its function, particularly in the…”
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QUANTITATIVE COMPARISON BETWEEN NEURAL NETWORK- AND SGM-BASED STEREO MATCHING
Published in International archives of the photogrammetry, remote sensing and spatial information sciences. (12-09-2019)“…Over the last decades, various methods for three-dimensional detection of the environment have been developed and successfully used. This work considers…”
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Infrared spectroscopy and nano-imaging of the insulator-to-metal transition in vanadium dioxide
Published in Physical review. B, Condensed matter and materials physics (10-02-2009)Get full text
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New aspects of boar semen freezing strategies
Published in Theriogenology (01-11-2008)“…Although cryopreserved boar semen has been available since 1975, a major breakthrough in commercial application has not yet occurred. There is ongoing research…”
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Pricing of “Follow-On” Drugs and Competition Within Pharmaceutical Classes: Evidence from Germany 1993-2008
Published in Value in health (01-11-2013)Get full text
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Regional estimates of the prevalence of diabetes mellitus in germany for 2011 and 2022 based on prescription data
Published in Value in health (01-05-2014)Get full text
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Observation of suppressed terahertz absorption in photoexcited graphene
Published in Applied physics letters (18-03-2013)“…When light is absorbed by a semiconductor, photoexcited charge carriers enhance the absorption of far-infrared radiation due to intraband transitions. We…”
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Experiencing more mathematics anxiety than expected? Contrasting trait and state anxiety in high achieving students
Published in High ability studies (03-07-2015)“…This study examined mathematics anxiety among high and low achieving students (N = 237, grades 9 and 10) by contrasting trait (habitual) and state (momentary)…”
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Isogeometric structural shape optimization
Published in Computer methods in applied mechanics and engineering (01-06-2008)“…An old dilemma in structural shape optimization is the needed tight link between design model or geometric description and analysis model. The intention of…”
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Increased gene expression of the cardiac endothelin system in obese mice
Published in Hormone and metabolic research (01-06-2015)“…Obesity is a well-known risk factor of atherosclerosis and heart failure. In the human heart, a local endothelin system containing prepro-endothelin-1,…”
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