Dr. Chhayabrita Biswas

Research Experience

The main area of my research had been to investigate experimentally the electronic structure of

Nanostructures on stepped and flat metallic surfaces

Magnetic thin films on metallic surfaces

Quantum well states in metallic thin films

Graphene

Intermetallics like magnetic shape memory alloys

low energy ion implantation in metal matrix

Bulk and surface plasmons

The nanostructures and thin films have been grown by self-assembly and molecular beam epitaxy technique. The polycrystalline ingots of lntermetallics have been prepared using Arc melting process and tubular as well as muffle furnaces.

TECHNIQUES USED

1. Synchrotron radiation source:
   
   -BESSY, Berlin, Germany
   -Elettra, Trieste, Italy
   
   
2. Photoelectron spectroscopy (PES):
   -Angle-Resolved PES:
   
   using synchrotron radiation source (BESSY)
   Hemispherical analyser (Scienta)
   Toroidal Analyser (La Trobe University).
   
   
   -Angle-Integrated PES:
   
   using Mg K_alpha and Al K_alpha sources.
   Hemispherical analyser (Specs).
   
   
   -Ultra-violet PES:
   
   using He I source.
   Hemispherical analyser (Specs).
   
   
3. VT-UHV Scanning Tunneling Microscopy (STM)



4. Low energy electron diffraction (LEED)



5. X-ray magnetic circular dichroism (XMCD): using synchrotron radiation source (Elettra)



6. X-ray diffraction (XRD)



7. Energy dispersive analysis of x-ray (EDAX)



8. Scanning electron microscopy (SEM)



9. Differential scanning calorimetry (DSC)



10. Magnetoresistance



11. Temperature dependent Resistivity

more ........

Ultra High Vacuum (UHV) fabrication:

1. Photoelectron spectrometer using laboratory source (XPS and UPS) and Hemispherical analyser (Specs).



2. Design of experimental chamber for Inverse photoelectron spectroscopy.



3. GM Detector and gas handling manifold for Inverse photoelectron spectroscopy.



4. Knudsen-cell for controlled growth of magnetic thin films.



5. Sample Holder with controlled heating and cooling facility and polar rotation.



6. Titanium Sublimation Pump head and LN2 shroud.

bit more ........

Electronic Structure Calculation:

Full-Potential Linearly Augmented Plane Wave (FPLAPW) under Density Functional Theory using Wien 2K