Steuerung nichtlinearer Selbstlokalisierungsphänomene stark koppelnder Ladungsträger in Lithiumniobat-Tantalat-Mischkristallen

Der Schwerpunkt dieses Teilprojektes ist die Wechselwirkung von stark koppelnden Ladungsträgern mit (i) den strukturbezogenen, atomistischen Eigenschaften des Mischkristallsystems, (ii) den dielektrischen und strukturellen Eigenschaften ferroelektrischer Domänenwände und (iii) den Transporteigenschaften ionischer Diffusion bei erhöhten Temperaturen. Das Projekt zielt damit auf die Bearbeitung der Frage nach der Rolle von strukturellen, elektronischen und ionischen Eigenschaften bei Selbstlokalisierungsmechanismen in dielektrischen, oxidischen Festkörpermaterialien im Allgemeinen.

Teilprojekt 01 im FOR 5044 im FIS der Universität Osnabrück
GPRIS Projektbeschreibung

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Long-lived, pulse-induced absorption in LiNb1−xTaxO3 solid solutions: the case of three intrinsic defect sites for electron localization with strong coupling Apr 9, 2024 Dömer, Niklas; Koelmann, Julian; Hesselink, Mira; Hehemann, Tobias; Pfannstiel, Anton; Sauerwein, Felix; Vittadello, Laura; Ganschow, Steffen; Imlau, Mirco, 2024, "Long-lived, pulse-induced absorption in LiNb1−xTaxO3 solid solutions: the case of three intrinsic defect sites for electron localization with strong coupling", https://doi.org/10.26249/FK2/NBRSHM, osnaData, V1 Femto-/nanosecond pulse-induced, red and near-infrared absorption is studied in LiNb1-xTaxO3 (LNT) solid solutions with the goal to probe the intrinsic defect structure via the formation, transport and recombination of optically generated small bound electron polarons with strong...
Small electron polarons bound to interstitial tantalum defects in lithium tantalate Apr 9, 2024 Pfannstiel, Anton; Hehemann, Tobias; Schäfer, Nils A.; Sanna, Simone; Suhak, Yuriy; Vittadello, Laura; Sauerwein, Felix; Dömer, Niklas; Koelmann, Julian; Fritze, Holger; Imlau, Mirco, 2024, "Small electron polarons bound to interstitial tantalum defects in lithium tantalate", https://doi.org/10.26249/FK2/WQCJCO, osnaData, V1 The absorption features of optically generated, short-lived small bound electron polarons are inspected in congruent lithium tantalate, LiTaO3 (LT), in order to address the question whether it is possible to localize electrons at interstitial TaV:VLi defect pairs by strong, short...

Long-lived, pulse-induced absorption in LiNb1−xTaxO3 solid solutions: the case of three intrinsic defect sites for electron localization with strong coupling

Apr 9, 2024

Dömer, Niklas; Koelmann, Julian; Hesselink, Mira; Hehemann, Tobias; Pfannstiel, Anton; Sauerwein, Felix; Vittadello, Laura; Ganschow, Steffen; Imlau, Mirco, 2024, "Long-lived, pulse-induced absorption in LiNb1−xTaxO3 solid solutions: the case of three intrinsic defect sites for electron localization with strong coupling", https://doi.org/10.26249/FK2/NBRSHM, osnaData, V1

Femto-/nanosecond pulse-induced, red and near-infrared absorption is studied in LiNb1-xTaxO3 (LNT) solid solutions with the goal to probe the intrinsic defect structure via the formation, transport and recombination of optically generated small bound electron polarons with strong...

Small electron polarons bound to interstitial tantalum defects in lithium tantalate

Apr 9, 2024

Pfannstiel, Anton; Hehemann, Tobias; Schäfer, Nils A.; Sanna, Simone; Suhak, Yuriy; Vittadello, Laura; Sauerwein, Felix; Dömer, Niklas; Koelmann, Julian; Fritze, Holger; Imlau, Mirco, 2024, "Small electron polarons bound to interstitial tantalum defects in lithium tantalate", https://doi.org/10.26249/FK2/WQCJCO, osnaData, V1

The absorption features of optically generated, short-lived small bound electron polarons are inspected in congruent lithium tantalate, LiTaO3 (LT), in order to address the question whether it is possible to localize electrons at interstitial TaV:VLi defect pairs by strong, short...

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