Question: Scientists from which of the following institution discovered the Existence of two species of (FEBs) in Superfluid Helium?
a) IISc
b) CSIR
c) TIFR
d) None of these
Answer: (a)
Related Facts:-
- Existence of two species of few electron bubbles (FEBs) found in Superfluid Helium.
- Existence of two species of few electron bubbles (FEBs) in superfluid helium found for the first time.
- Scientists at the Indian Institute of Science (IISc) have experimentally shown this.
- These FEBs can serve as a useful model to study how the energy states of electrons and interactions between them in a material influence its properties.
- The team of scientists at Bengaluru-based IISc has done the research which culminated in this kind of discovery.
- The team included Neha Yadav, a former PhD student at the Department of Physics, Prosenjit Sen, Associate Professor at the Centre for Nano Science and Engineering (CeNSE) and others.
- The study was published in the journal ‘Science Advances’.
- The research indicated that an electron injected into a superfluid form of helium creates a single electron bubble (SEB).
- This SEB is like a cavity that is free of helium atoms and contains only the electron.
- The shape of the bubble depends on the energy state of the electron, for instance, the bubble is spherical when the electron is in the ground state (1S).
- There are also MEBs multiple electron bubbles that contain thousands of electrons.
- FEBs, on the other hand, are nanometre-sized cavities in liquid helium containing just a handful of free electrons.
- The number, state and interactions between free electrons dictate the physical and chemical properties of materials.
- Studying FEBs, therefore, could help scientists better understand how some of these properties emerge when a few electrons present in a material interact with each other.
- According to the authors, understanding how FEBs are formed can also provide insights in to the self-assembly of soft materials.
- It can be important for developing next- generation quantum materials. However, scientists have only theoretically predicted the existence of FEBs so far.
- Researcher Neha Yadav said, we have now experimentally observed FEBs for the first time and understood how they are created.
- These are nice new objects with great implications if we can create and trap them.
- Yadav and colleagues were studying the stability of MEBs at nanometer sizes when they serendipitously observed FEBs.