Programa de Pós-Graduação em Física da UFSC, Florianópolis

Seminário com o Prof. Dr. Gilberto Medeiros – 17 de março de 2017 – 10h15min

10/03/2017 16:37

O PROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA convida para o seminário:

Memristors: a primer and perspectives*

Prof. Dr. Gilberto Medeiros

UFMG

*Evento de presença obrigatória para os alunos matriculados na disciplina seminários

Resumo:

Memristors are one class of devices that cannot be described or emulated by association of resistors, capacitors and inductors. A pinched hysteresis is usually the fingerprint of memristive behaviour [1,2]. Beyond simple modelling presented in the early 70s [1,2], significant experimental progress has been achieved, to the point where now there are several companies and research teams working with these devices in a number of applications ranging from neuromorphic computing [3,4] to non-volatile memories [5]. Here I will discuss the anatomy of conductive channels in memristors, by means of structural and chemical characterization afterproper identification through pressure modulated conductance experiments [6]. Subsequently, the upper limits of switching speeds of these devices will be discussed [7], as well as our modelling results [8]. Finally, complementing the modelling picture I will conclude showing our latest results on noise characteristics of these intriguing devices [9].

References

[1] L. O. Chua, “Memristor – missing circuit element”. IEEE Trans. Circuit Theory CT-18, 507-519 (1971).

[2] L. O. Chua, & S. M. Kang, “Memristive devices and systems”. Proceedings of the IEEE 64,209-223 (1976).

[3] M. Prezioso, et al. “Training and operation of an integrated neuromorphic network basedon metal-oxide memristors”, Nature 521, 61-64 (2015).

[4] J.J. Yang, D.B. Strukov & D.R. Stewart, “Memristive devices for computing”, Nature Nanotech. 8, 13-24 (2013).

[5] for example, http://www.crossbar-inc.com/

[6] F. Miao et al., “Anatomy of a Nanoscale Conduction Channel Reveals the Mechanism of a High-Performance Memristor”, Adv. Mater. 23, 5633-5640 (2011).

[7] A. C. Torrezan, J. P. Strachan, G. Medeiros-Ribeiro, & R.S. Williams, “Sub-nanosecondswitching of a tantalum oxide memristor”, Nanotechnology 22, 485203 (2011).

[8] J.P. Strachan, et al. “State Dynamics and Modeling of Tantalum Oxide Memristors”, IEEETransactions on Electron Devices 60, 2194-2202 (2013).

[9] W. Yi, et al., “Quantized Conductance coincides with State Instability and Excess Noise inTantalum Oxide Memristors”, Nature Communications, in press.

Data: 17 de março de 2017 – (3/17/2017)- Local: Sala 212 – Auditório do Departamento de Física – Horário: 10h15min

Seminários

RESULT OF THE SELECTION FOR HIRING OF FOREIGN VISITING PROFESSOR AT THE GRADUATE PROBRAM OF PHYSICS

09/03/2017 15:45

RESULT OF THE SELECTION FOR HIRING OF FOREIGN VISITING PROFESSOR AT THE GRADUATE PROBRAM OF PHYSICS

On the March 8^th, 2017, at 9:00am, in the Meeting Room of the Coordination of the Graduate Program in Physics, the Committee of the Selective Process for hiring of foreign visiting professor, referring to EDITAL N^o.39/DDP/ PRODEGESP/2016, formed through the ordinance no.08/PPGFSC/2017, of FEBRUARY 16th, 2017, in order to establish the final result of the selection process for hiring of foreign visiting professor in the scope of the Graduate Program of Physics. Based on the analysis of the documentation submitted by the candidates, the evaluation was carried out in accordance with the norms expressed in the mentioned EDITAL, giving a score of 10 (ten) for the highest score achieved and the scores of the other candidates calculated proportionally from their score obtained. The candidate with a final score equal to or greater than 7 (seven) was considered approved. Below is the result:

Final Result

The resources regarding the final result must be sent to the e-mail Esta imagem contém um endereço de e-mail. É uma imagem de modo que spam não pode colher. until 5:00 pm on March 11, 2017

Sem categoria

Seminário Planetas Extrassolares e Vida no Universo

09/03/2017 08:22

O Programa de Pós-Graduação em Física e o Parque Viva Ciência convidam a todos para:

Planetas extrassolares e vida no universo

Professor Roberto Saito

A vida como conhecemos é um fenômeno planetário até o momento limitado ao nosso lar no Universo, a Terra. Entretanto, nas últimas duas décadas a astronomia vem passando por um momento único, com a descoberta de um número cada vez maior de planetas orbitando outras estrelas, os chamados planetas extrassolares. Alguns desses novos mundos são especialmente importantes por suas similaridades com a Terra, o que permitiria abrigar vida. Nesse seminário falaremos sobre a busca e o estudo de planetas extrassolares, nosso conhecimento atual sobre exoplanetas potencialmente habitáveis e as perspectivas que a busca por vida fora da Terra nos reservam nas próximas décadas.