Complexity and Electronic Properties (CEP)
- Group Members
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Effective Members:
-Anabela G Rolo – Assistant Professor
-Francisco J M Macedo – Assistant Professor
-João Pedro H A Alpuim – Assistant Professor
-José Carlos V Gomes – Assistant Professor
-José M P Carmelo – Full Professor
-Gueorgui V Smirnov– Full Professor
-Maria Fátima G Cerqueira – Assistant Professor
-Maria José F A F Sampaio – Assistant Professor
-Mikhail I Vasilevskiy– Full Professor
-Nuno M R Peres– Full Professor
-Ricardo P L M M Ribeiro – Assistant Professor
Researchers:
-Ivan Larkin- Senior Researcher (Welcome II)
-Jaime E V S M Santos - Researcher
-Anura P Samantilleke – Researcher
Post-doctorate researchers and research Fellows with PhD:
-Yuliy Bludov, Post-Doc Fellow
-Vadim Ponomarenko, Post-Doc Fellow
-Isabel Moura, Post-Doc
-Tilen Cadez, Post Doc
-João Viana, Pós Doc
PhD and other research students:
-Filipe Oliveira, PhD student with FCT grant
-Bruno Amorim, PhD student with FCT grant
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- Research
GCEP experimental and theoretical research is focused on electronic properties of new materials (e.g. graphene and nanocrystalline silicon), limiting states of matter and out-of-equilibrium statistical physics. Besides, more applied work is dedicated to the fabrication of novel electronic devices of high technological potential such as strain-sensors arrays for e-textiles and health care, flexible silicon solar cells on plastic and thermoelectric energy scavenging microsystems. Constructive interaction between fundamental and applied research is one of the main concerns of the group.
Thin-films for electronic laboratory – Chemical Vapor Deposition Systems
Thin-films for electronic laboratory – Physical Vapor Deposition System
Thin-films for electronic laboratory – Optoelectronics room
Dispertion relation of graphene including first and secondnearest neighbor hopping parameters. A zoom in of the dispersion close to theDirac point is also shown. It is clear that close to the Dirac point thedispersion is conical.
© Nuno Peres 2007
Experimental peak dispersions (gray scale) obtained by ARPESalong the easy-transport axis of the molecular chains of the organic compoundTTF–TCNQ and matching theoretical branch and border lines. (The Z-pointcorresponds to the momentum k = π.).
Thin-filmsilicon solar cells deposited on flexible plastics at low temperature (150ºC).These solar cells have efficiency = 5%, VOC = 0.9 V and Jcc= 10 mA/cm2.
Piezoresistiveresponse of doped nanocrystalline silicon thin films as a function of applieduniaxial longitudinal strain. While n-type films show a decrease in theresistance for positive strain (tractive) and an increase of resistance fornegative strain (compressive), p-type films exhibit the inverse behavior. Thiscan be explored for smart sensor fabrication.
a) b)
Jammed statesnapshot for colloidal particles adsorption on a pre-patterned substrate with25´25 unit cells with square shape. Adsorption only can take place inside thesquares. The size of the square is 0.2 (a) and 1.2 (b) and the distance betweensquares is 0.5 (a) and 0.2 (b), in units of particle diameter. Due to theexcluded volume interaction between particles, locally diagonal, semi-ordereddomains are formed. In (b) the distance between squares is shorter than in (a)which leads to a longer-range diagonal semi-ordering.
- Selected papers:
Paper inserted in RepositoriUM