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DISEMINAREA REZULTATELOR

New! CONFERENCES 2023

1. International Semiconductor Conference (CAS) 46 Edition,  October 11-13, 2023, Sinaia Romania.
https://www.imt.ro/cas/

2. Exploring the oxygen effect on optical properties of amorphous vanadium, oxide thin films, I. Mihalache, S. Vulpe, G. Craciun, C. Romanitan, F. Comanescu, R. Plugaru, International Semiconductor Conference (CAS) 46 Edition, October 11-13, 2023, Sinaia Romania.

3. The structure of electric current across a FTJ at room temperature, T. Sandu, International Semiconductor Conference (CAS) 46 Edition, October 11-13, 2023, Sinaia Romania.

4. EMRS Spring Meeting, Strasbourg, France, May 29 – June
https://www.european-mrs.com/meetings/2023-spring-meeting

5. First principles electron transport in magnetoelectric SrRuO3/BaTiO3/SrTiO3 Interfaces, N. Plugaru, T. Sandu, R. Plugaru, C.Tibeica, N. Filipoiu, G.A. Nemnes, EMRS Spring Meeting, Strasbourg, France, May 29 - June 2,  oral presentation, Spring 23_ Conference program P-7.

6. Phase-electrical function relationship of vanadium oxide based heterostructures, R. Plugaru, S. Vulpe, G. Craciun, C. Romanitan, F. Comanescu, N. Plugaru, EMRS Spring Meeting, Strasbourg, France, May 29 – June 2,  poster presentation,  Spring 23_Conference program Q-8.

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PUBLICATII STIINTIFICE

• New! First principles electron transport in magnetoelectric SrRuO 3 /BaTiO 3 /SrTiO 3 /SrRuO 3 interfaces" by Filipoiu et al
  We are pleased to let you know that the final version of record of your article has now been published to IOPscience and can be found online at https://doi.org/10.1088/1361-6528/ad960f.

• Light-Sensing Properties of Amorphous Vanadium Oxide Films Prepared by RF Sputtering by Rodica Plugaru, Iuliana Mihalache, Cosmin Romaniţan, Florin Comanescu, Silviu Vulpe, Gabriel Craciun, Neculai Plugaru and Nikolay Djourelov, Sensors, 23, 1759 (2023).
  https://doi.org/10.3390/s23041759

• Parametric simulations of composite barrier FTJs under external bias at room temperature, Catalin Tibeica, Titus Sandu, Oana Nedelcu, Rodica Plugaru, Neculai Plugaru, Results in Physics, 47, 106350 (2023). https://www.sciencedirect.com/science/article/pii/S2211379723001432?via%3Dihub

• "Insights into Electron Transport in a Ferroelectric Tunnel Junction", T. Sandu, C. Tibeica,
  R. Plugaru, O. Nedelcu and N. Plugaru, Nanomaterials 12, 1682 (2022). https://doi.org/10.3390/

• "Non-linear I-V characteristics of Co/BTO/LSMO ferroelectric tunnel junction", T. Sandu,
  C. Tibeica, O. Nedelcu, R. Plugaru, N. Plugaru, Int. Semicond. Conf. (CAS), 12-14 Oct. 2022, Conf. Proceedings, pp.113-116 (2022). DOI: 10.1109/CAS56377.2022,
  https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9934305

• "Physical modeling of ferroelectric tunnel junctions"
  Titus Sandu; Catalin Tibeica; Rodica Plugaru; Oana Nedelcu; Neculai Plugaru
  https://ieeexplore.ieee.org/document/9604149

• "Insights into electron transport in a ferroelectric tunnel junction"
  T. Sandu, O. Nedelcu, C. Tibeica, R. Plugaru, O. Nedelcu, N. Plugaru
  https://icpam.ro/main/wp-content/uploads/BoA-ICPAM-13-v3.pdf

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IMPACTUL SI REZULTATUL MAJOR AL PROIECTULUI

Tehnologiile la scala atomica, i.e. dimensiuni mai mici de 10-10 m, si timpi caracteristici de ordin de femtosecunde (10-15 s), conditii in care efectele cuantice isi manifesta prezenta, pe scurt Tehnologiile cuantice, au devenit un domeniu prioritar al cercetarilor de varf si in domeniul materialelor (multi)feroice. Aceste materiale, caracterizate prin proprietati feroelectrice, magnetice, piezoelectrice, sau/si ferotoroidice, prezinta o fenomenologie bogata datorita competitiei dintre mecanismele fundamentale de interactiune, in special la interfete. Cercetarile vizeaza utilizarea acestor proprietati pentru realizarea unei generatii avansate de senzori si dispozitive electronice cu functionalitati bazate pe efecte cuantice, cu un consum energetic extrem de redus si densitate mare de integrare. Aplicatiile includ, dar nu se limiteaza la, memorii cu stari multiple nevolatile, jonctiuni tunel fero- sau magnetoelectrice (FTJs) si tranzistori cu capacitate negativa pentru dispozitive sinaptice, celule solare fotoferoice cu eficienta mare a conversiei energiei, cat si o mare varietate de senzori electro-optici multifunctionali.

In cadrul proiectului COMPFER am abordat tematica proiectarii si optimizarii computationale a jonctiunilor feroice prin tunelare, utilizand trei metode complementare: i) calcule first principles
in cadrul teoriei functionalei de densitate (DFT); ii) simulari de mediu continuu (FEM), si iii) modelare numerica prin functii Green de neechilibru (NEGFs). Studiile au fost realizate atat pe heterostructuri cu interfete ideale, cat si pe modele care considera prezenta defectelor, a deformarilor elastice, sau efecte la temperatura finita si modificarea formei barierei sub actiunea unui potential aplicat. Pentru evaluarea proprietatilor FTJs a fost considerat un set de criterii de performanta care include stabilitatea polarizarii feroelectrice, taria cuplajului magnetoelectric interfacial si coeficientii de merit TER (tunneling electroresistance ratio) si TMR (tunneling magnetoresistance ratio).

Rezultatul de importanta majora al Proiectului consta in faptul ca a adus contributii originale la descrierea fenomenologiei caracteristice FTJs si a generat linii directoare utile in proiectarea lor, pe fiecare dintre directiile de cercetare si in acord cu obiectivele propuse.