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SPS organises a webinar by Dr. Shiv J. Singh

SPS organises a webinar by Dr. Shiv J. Singh

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SPS organises a webinar by Dr. Shiv J. Singh
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School of Physical Sciences
Jawaharlal Nehru University

 

SPS Webinar

 

on

 

Recent progress of high Tc iron-based superconductors: 1111 and 1144

 

Dr. Shiv J. Singh
Institute of High-Pressure Physics, Polish Academy of Sciences, Warsaw Poland

 


Date: July 21, 2022 (Thursday) Time: 4:00 PM
Venue: Seminar Hall, SPS

 


Abstract : Superconducting materials have great potential for many practical applications, such as high-field magnet technology, loss-less electric power transmission, maglev train transportation, nuclear magnetic resonance (NMR) systems, nuclear fusion reactors, and so on. The discovery of a novel iron-based superconductor (FBS) in 2008 sparked huge interest in this field, and numerous research activities are currently going on with various kinds of FBS. FBS became the second high-Tc-superconducting family after cuprate superconductors and has more than 100 compounds that can be categorized into 5-6 families. The 1111 (REFeAsO, RE = Rare earth) and 1144 (AEAFe4As4, AE = Ca, Eu; A = K, Rb) families are the two most important families of FBS, which offer the high Tc of 58 K and 36 K as a doped and undoped system, respectively. Furthermore, the growth of these families is not an easy process, and a lot of research efforts have been reported in this direction. However, the preparation of high-quality and suitable-sized samples is still challenging and the reported results are controversial, and at the moment, a consensus has not been reached due to lack of sample issues. In this presentation, we will review the superconducting properties of the 1111 and 1144 families, as well as their growth processes, such as polycrystals and single crystals. We will also make a short comparison between them to understand the developmental issues and to resolve the basic growth problems.

A warm welcome to the modified and updated website of the Centre for East Asian Studies. The East Asian region has been at the forefront of several path-breaking changes since 1970s beginning with the redefining the development architecture with its State-led development model besides emerging as a major region in the global politics and a key hub of the sophisticated technologies. The Centre is one of the thirteen Centres of the School of International Studies, Jawaharlal Nehru University, New Delhi that provides a holistic understanding of the region.

Initially, established as a Centre for Chinese and Japanese Studies, it subsequently grew to include Korean Studies as well. At present there are eight faculty members in the Centre. Several distinguished faculty who have now retired include the late Prof. Gargi Dutt, Prof. P.A.N. Murthy, Prof. G.P. Deshpande, Dr. Nranarayan Das, Prof. R.R. Krishnan and Prof. K.V. Kesavan. Besides, Dr. Madhu Bhalla served at the Centre in Chinese Studies Programme during 1994-2006. In addition, Ms. Kamlesh Jain and Dr. M. M. Kunju served the Centre as the Documentation Officers in Chinese and Japanese Studies respectively.

The academic curriculum covers both modern and contemporary facets of East Asia as each scholar specializes in an area of his/her interest in the region. The integrated course involves two semesters of classes at the M. Phil programme and a dissertation for the M. Phil and a thesis for Ph. D programme respectively. The central objective is to impart an interdisciplinary knowledge and understanding of history, foreign policy, government and politics, society and culture and political economy of the respective areas. Students can explore new and emerging themes such as East Asian regionalism, the evolving East Asian Community, the rise of China, resurgence of Japan and the prospects for reunification of the Korean peninsula. Additionally, the Centre lays great emphasis on the building of language skills. The background of scholars includes mostly from the social science disciplines; History, Political Science, Economics, Sociology, International Relations and language.

Several students of the centre have been recipients of prestigious research fellowships awarded by Japan Foundation, Mombusho (Ministry of Education, Government of Japan), Saburo Okita Memorial Fellowship, Nippon Foundation, Korea Foundation, Nehru Memorial Fellowship, and Fellowship from the Chinese and Taiwanese Governments. Besides, students from Japan receive fellowship from the Indian Council of Cultural Relations.