Browsing by Author "ANDRONIC, Silvia"

3D modeling of the Peierls transition in TTF-TCNQ organic crystals

ANDRONIC, Silvia (Academy of Sciences of Moldova, 2015)

The Peierls structural transition in quasi-one-dimensional (Q1D) TTF-TCNQ organic crystals of is studied in the 3D approximation. Two the most important electron-phonon interactions are considered. The analytic expression ...

Analysis of phonons behavior in quasi-one-dimensional crystals of TTT(TCNQ)2 near the Peierls structural transition in a 3D approximation

ANDRONIC, Silvia; SANDULEAC, Ionel (Technical University of Moldova, 2023)

This research paper focuses on investigating the metal-insulator transition occurring in quasi-one-dimensional organic crystals of TTT(TCNQ)2. The study utilizes a 3D approximation approach and introduces a physical model ...

Două greşeli persistente în aplicarea legii conservării impulsului

ANDRONIC, Silvia; COLPAJIU, Mircea (Institutul de Inginerie Electronică şi Nanotehnologii „Dumitru Ghiţu”, 2013)

În acest articol autorii analizează câteva cazuri de aplicare a legii conservării impulsului.

Effect of impurity scattering on Peierls structural transition in TTT2I3 crystals

ANDRONIC, Silvia; CASIAN, Anatolie (Tehnica UTM, 2014)

Many quasi-one-dimensional organic crystals, known as synthetic metals at room temperature, become insulators when the temperature decreases, due to a Peierls transition. In the crystals with half-filled Brillouin zone the ...

Effect of peierls transition on the phonon spectrum in organic crystals of TTT2I3 for different values of carrier concentration

ANDRONIC, Silvia; CASIAN, Anatolie; SANDULEAC, Ionel; BALMUS, Ion (Tehnica UTM, 2019)

The metal-insulator transition of Peierls type and its effect on the phonon spectrum in quasi-one-dimensional organic crystals of TTT2I3 for different values of carrier concentration is studied in 2D approximation. In the ...

Effect of the peierls transition on the phonon spectrum in TTF-TCNQ crystals

ANDRONIC, Silvia; BALMUȘ, Ion; CASIAN, Anatolie (2016)

It was demontrated theoretically that organic crystals of TTF-TCNQ are good candidates for thermoelectric materials. Because not all parameters of these materials are known, it is necessary to determine some of them. We’ll ...

Fononii оn apropierea tranziţiei de fază peierls оn cristale organice cvasiunidimensionale

ANDRONIC, Silvia; CASIAN, Anatolie (Technical University of Moldova, 2012)

Many quasi-one-dimensional organic crystals, known as synthetic metals at room temperature, become insulators when the temperature decreases, due to a Peierls transition. In the crystals withhalf filled conduction band the ...

Generation of high amplitudes pulses with excitable DFB lasers and an integrated dispersive reflector

ANDRONIC, Silvia; GRIGORIEV, Eugeniu; TRONCIU, Vasile (Technical University of Moldova, 2022)

This paper is devoted to investigation of pulse generation by a distributed feedback (DFB) laser with an integrated passive dispersive reflector. This configuration is treated in the framework of the simple rate equation ...

Generation of pulses with excitable DFB laser with dispersive reflector

ANDRONIC, Silvia; GRIGORIEV, Eugeniu; TRONCIU, Vasile (Technical University of Moldova, 2021)

This paper is devoted to investigation of pulse generation by a DFB laser with an integrated passive dispersive reflector. This configuration is treated in the framework of the simple rate equation model. The theoretical ...

Influenţa tranziţiei de fază Peierls asupra spectrului fononilor în cristalul organic cvasiunidimensional TTF-TCNQ

CASIAN, Anatolie; ANDRONIC, Silvia; DUŞCIAC, Viorel (Universitatea de Stat din Moldova, 2013)

În această lucrare este studiată variaţia spectrului fononilor în cristalul cvasiunidimensional organic TTF-TCNQ în vecinătatea tranziţiei Peierls, fiind determinată temperatura critică Peierls. În acest scop s-a utilizat ...

Investigarea proprietăţilor termoelectrice și optice ale materialelor nanostructurate și sistemelor moleculare

SANDULEAC, Ionel; ANDRONIC, Silvia; OLOINIC, Tatiana; MÎRZAC, Alexandra (Agenţia de Stat pentru Proprietatea Intelectuală a Republicii Moldova (AGEPI), 2019)

S-a propus investigarea proprietăţilor termoelectrice ale cristalelor organice nanostructurate de tip p și de tip n, ca functie de temperatură. Determinarea parametrilor optimi pentru implementarea materialelor date în ...

Metal-Insulator Transition of Peierls Type in TTT2I3 Crystals in 3D Approximation

ANDRONIC, Silvia; BALMUȘ, Ion; CASIAN, Anatolie (Technical University of Moldova, 2017)

The metal-insulator transition in quasi-one-dimensional organic crystals of tetrathiotetraceneiodide, TTT2I3, is investigated in 3D approximation. A more complete physical model of the crystal is applied which takes into ...

Modeling of the structural transition in the nanostructured tetrathiotetracene-iodide crystal

ANDRONIC, Silvia (Technical University of Moldova, 2015)

The Peierls structural transition in quasi-one-dimensional (Q1D) organic crystals of tetrathiotetracene iodide (TTT2I3) is presented in the 1D and 2D physical model. For a more complete description of the crystal, two the ...

Organic Nanostructured Crystals for Thermoelectric Cooling in Medical Applications

SANDULEAC, Ionel; ANDRONIC, Silvia; BALMUS, Ion (Springer Nature Switzerland, 2023)

In this study we performed theoretical calculations and numerical modelling of a thermoelectric p-n pair composed of organic nanostructured crystals. Specifically, we focus on two highly promising materials: TTT2I3 and ...

Peierls structural transition in organic crystals of TTT2I3 : 2D modeling

ANDRONIC, Silvia; BALMUS, Ion; CASIAN, Anatolie (Tehnica UTM, 2015)

The Peierls structural transition in quasi-one-dimensional organic crystals of tetrathiotetracene iodide (TTT2I3) with a quarter filled zone is studied in 2D physical model. A more complete crystal model is used which takes ...

Peierls Structural Transition in Q1D Crystals of TTF-TCNQ Type for Different Values of Carrier Concentration

ANDRONIC, Silvia; CASIAN, Anatolie; DUSCIAC, Viorel (Elservier, 2015)

The Peierls structural transition is studied in quasi-one-dimensional (Q1D) organic crystals of the tetrathiofulvalene-tetracyanoquinodimethane (TTF-TCNQ) type in a more complete 2D physical model. Unlike the previous ...

Peierls Structural Transition in Quasi-One-Dimensional Organic Crystals of TTT2I3

ANDRONIC, Silvia; CASIAN, Anatolie (Institutul de Fizică Aplicată al AŞM, 2017)

The Peierls structural transition in quasi-one-dimensional (Q1D) organic crystals of tetrathiotetracene iodide (TTT2I3.1) is presented in the 3D physical model.

Peierls structural transition of TTF-TCNQ organic crystals in the 2D physical model

ANDRONIC, Silvia; BALMUS, Ion; CASIAN, Anatolie (Tehnica UTM, 2014)

Many quasi-one-dimensional (Q1D) organic crystals, known as synthetic metals at room temperature, become insulators when the temperature decreases, due to the Peierls transition. In the last years, it was demonstrated ...

Peierls transition in organic crystals of TTT2I3 for different values of carrier concentration

ANDRONIC, Silvia; BALMUS, Ion; CASIAN, Anatolie (Tehnica UTM, 2018)

Peierls transition in quasi-one-dimensional organic crystals of tetrathiotetracene-iodide, TTT2I3, is investigated in 3D approximation. For a more complete description of the crystal model, two the most important hole-phonon ...

Peierls transition in quasi-one-dimensional crystals of TTF-TCNQ type in a 2D approximation

ANDRONIC, Silvia (Academy of Sciences of Moldova, 2014)

Peierls transition in quasi-one-dimensional organic crystals of TTF-TCNQ type is studied in a 2D physical model of the crystal. The two most important electron-phonon interactions are simultaneously considered. The analytic ...

Browsing by Author "ANDRONIC, Silvia"

Browsing by Author "ANDRONIC, Silvia"

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