外国人客員所員を経験してYogesh Singh
Indian Institute of Science Education and Research Mohaliyogesh@iisermohali.ac.in
I spent half a sabbatical at ISSP from Nov. 2019 to May

According to the demand of the unusual situation, only a2020. My hosts at ISSP were Prof. Sakakibara and Prof.

restricted access to ISSP in the last part of my stay wasNakatsuji. Although I had never met them before, I had

possible, which limited the measurements we were able

always been following their work and it was a pleasure

to do. However, I plan to continue working on the variousto be able to visit ISSP to work with them. I was very

projects we started at ISSP.

impressed by the range of activities and experimental

I must convey my heartfelt gratitude to the staff at theinfrastructure at ISSP.

international liaison office for making my stay as

The project that I had written for my visiting

convenient and pleasant as possible. I specially want toprofessorship was on trying to synthesize single crystals

thank Yuko for her help in various matters andof the Heavy Fermion material Yb2Fe3Si5 and to study

situations, many times going beyond the demand of her

its low temperature properties as a function of field andduties.

pressure. I was able to grow the first ever single crystals

I also want to acknowledge the help of Kyoko Fujita forof Yb2Fe3Si5 and start a detailed low temperature study

her help and administrative support during my stay.

of its magnetic, thermal, and electrical transport

I finally would like to thank the Nakatsuji groupproperties. On this project I was able to start

members who were always ready and eager to help me incollaborations with Prof. Sakakibara’s group and Prof.

whatever way they could. I thank Nan and Akito withUwatoko’s group.

This work is still continuing and I

whom I worked on some projects. A special mention must

will keep collaborating with groups at ISSP to

be made of Hiroto Nakamura, who I worked with almost

understand this fascinating material in as much detailevery day. He was very patient in teaching me the use ofas possible.

various instruments and equipment that I used during

I also started working on a different topic of possible

my stay. I wish him all the best in his academic career.

Topological and strong correlation superconductivity inI also must mention the company of Mayukh Ray andthe La-Ru-Si system.

We grew high quality single

Dilip Bhoi (Uwatoko group) which made coffee sessions

crystals and started a detailed study of the anisotropic

enjoyable. I particularly liked our discussions on physics,superconducting properties. I also started a collaboration

politics, and almost everything under the sun.

with Prof. Y. Kohama’s group to measure the high fieldI enjoyed and appreciate the interactions with Prof.

quantum oscillations to unveil the Fermiology ofNakatsuji, which were always interesting. I also enjoyedelectrons in this material. In addition, we started ahaving dinner parties with Satoru and various groupcollaboration with Prof. R. Arita’s group at the Univ. of

members on several occasions.

Tokyo to calculate the theoretical band structure of theI also thank the other faculty at ISSP with whom Imaterial.

interacted. These include Prof. Sakakibara, Prof. M.

Thus it was academically a very fruitful stint for me

Yamashita, Prof. Uwatoko, Prof. Y. Kohama, and Prof.

personally.

Masashi Takigawa.

The second half of my stay however, wasfull of uncertainties and confusion as the world andI had a wonderful stay at ISSP and I look forward to theJapan started tackling the challenge presented by theopportunity to visit again.

Corona virus which escalated into a global pandemic.
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