Alexandra Papadogianni

activity

20202025

most citedConductance Model for Single-Crystalline/Compact Metal Oxide Gas Sensing Layers in the Non-Degenerate Limit: Example of Epitaxial SnO

_{2}

(101)

24 citations · 85 across the 7 of their papers we have counts for

collaborators

7 papers

cond-mat.mtrl-sci2025★ 2 cited

Unravelling the oxygen influence in cubic bixbyite In $_{2}$ O $_{3}$ on Raman active phonon modes by isotope studies

Johannes Feldl, Roland Gillen, Janina Maultzsch +5

In this study, we performed comprehensive investigations on the Raman active phonon modes in cubic bixbyite In $_{2}$ O $_{3}$ , an important oxide based, wide-bandgap semiconductor. Funda…

cond-mat.mtrl-sci2021★ 8 cited

The electrical conductivity of cubic (In $_{1 - x}$ Ga $_{x}$ ) $_{2}$ O $_{3}$ films ( $x \leq 0.18$ ): Native point defects, Sn-doping, and the surface electron accumulation layer

Alexandra Papadogianni, Takahiro Nagata, Oliver Bierwagen

The alloying of the group-III transparent semiconducting sesquioxides In $_{2}$ O $_{3}$ and Ga $_{2}$ O $_{3}$ can lead to a modulation of the properties of the parent compounds, e.g., the shal…

cond-mat.mtrl-sci2021★ 8 cited

Molecular beam epitaxy of single-crystalline bixbyite (In $_{1 - x}$ Ga $_{x}$ ) $_{2}$ O $_{3}$ films ( $x \leq 0.18$ ): Structural properties and consequences of compositional inhomogeneity

Alexandra Papadogianni, Charlotte Wouters, Robert Schewski +9

In this work, we show the heteroepitaxial growth of single-crystalline bixbyite (In $_{1 - x}$ Ga $_{x}$ ) $_{2}$ O $_{3}$ films on (111)-oriented yttria-stabilized zirconia substrates using plas…

cond-mat.mtrl-sci2021★ 5 cited

Bandgap widening and behavior of Raman-active phonon modes of cubic single-crystalline (In,Ga) $_{2}$ O $_{3}$ alloy films

Johannes Feldl, Martin Feneberg, Alexandra Papadogianni +5

The influence of Ga incorporation into cubic In $_{2}$ O $_{3}$ on the electronic and vibrational properties is discussed for (In $_{1 - x}$ ,Ga $_{x}$ ) $_{2}$ O $_{3}$ alloy films grown by molecular b…

cond-mat.mtrl-sci2020★ 24 cited

Conductance Model for Single-Crystalline/Compact Metal Oxide Gas Sensing Layers in the Non-Degenerate Limit: Example of Epitaxial SnO $_{2}$ (101)

Cristian Simion, Federico Schipani, Alexandra Papadogianni +6

Semiconducting metal oxide (SMOX)-based gas sensors are indispensable for safety and health applications, e.g. explosive, toxic gas alarms, controls for intake into car cabins and…

cond-mat.mtrl-sci2020★ 24 cited

Conduction Mechanisms in Epitaxial NiO/Graphene Gas Sensors

Somayeh Saadat Niavol, Melanie Budde, Alexandra Papadogianni +9

Integrated, highly sensitive and reversible sensor devices for toxic and hazardous gases in environmental pollution monitoring can be realized with graphene-based materials. Here w…

physics.app-ph2020★ 14 cited

The two-dimensional electron gas of the In2O3 surface: Enhanced thermopower, electrical transport properties, and its reduction by adsorbates or compensating acceptor doping

Alexandra Papadogianni, Julius Rombach, Theresa Berthold +4

In2O3 is an n-type transparent semiconducting oxide possessing a surface electron accumulation layer (SEAL) like several other relevant semiconductors, such as InAs, InN, SnO2, and…

Unravelling the oxygen influence in cubic bixbyite In2​O3​ on Raman active phonon modes by isotope studies

The electrical conductivity of cubic (In1−x​Gax​)2​O3​ films (x≤0.18): Native point defects, Sn-doping, and the surface electron accumulation layer

Molecular beam epitaxy of single-crystalline bixbyite (In1−x​Gax​)2​O3​ films (x≤0.18): Structural properties and consequences of compositional inhomogeneity

Bandgap widening and behavior of Raman-active phonon modes of cubic single-crystalline (In,Ga)2​O3​ alloy films

Conductance Model for Single-Crystalline/Compact Metal Oxide Gas Sensing Layers in the Non-Degenerate Limit: Example of Epitaxial SnO2​(101)