Welcome

Graduate student and postdoctoral openings: (updated July 27, 2017)
At the moment the group is at maximum capacity. All postdoctoral positions have been filled.  We will post a note here if there are openings to that effect.  Generally, this status changes on a 6-12 month time scale.
 
Our research group studies condensed matter systems, often in the solid state, using first principles or ab initio electronic structure methods. We are part of
  • Yale Applied Physics at Yale University
  • Yale Physics and the Condensed Matter Theory Group
  • CRISP: Yale’s NSF MRSEC center
We study the physics of condensed matter systems, usually the solid state, using first principles or ab initio methods. We solve the quantum mechanical many-body problem of interacting electrons and ions to the best of our abilities, with the fewest approximations possible, and with no adjustable parameters or fitting. The cost is that the calculations must be done numerically and can be quite difficult to perform. The advantage is that the results are generally reliable and accurate, and hence can be compared with confidence to experimental findings to help understand, clarify, and even predict observed physical phenomena.
 
The reliability also implies that we can use ab initio modeling as an ideal virtual laboratory to study microscopic physical phenomena. By ideal we mean that the physical setup (atomic positions, boundary conditions, imposed fields, etc.) is specifiable and modifiable at will.
 

News

October 17, 2017
Alexandru’s nice work explaining why it has been difficult to get symmetry breaking in slave-boson theories as well as how to fix this problem is now out.  A nice work...
September 19, 2017
This Nature Materials Review outlines the growing importance of picometer scale structural motifs for control and design of functional materials.  The picoscale is the...
August 8, 2017
Subhasish’s work on DFT+DMFT to understand the strength and effects on electronic correlations on the electronic properties of monolayer FeSe on SrTiO3.  Work was done...
August 1, 2017
Mehmet’s work on the BaTiO3/Ge epitaxial interface published.  This detailed work describes multiple interfacial structures, the polarization profiles in the BaTiO3,...
May 22, 2017
Alexandru and Mehmet officially received their Physics Ph.D. degrees today so we did the dressup routine.  Congratulations to both!
May 19, 2017
In collaboration with Prof. Robert’s Klie group at UIC and Charles Ahn’s group at Yale, the real-space electronic structure of titante/nickelate interfaces...
March 7, 2017
Congratulations to Drs. Alexandru B. Georgescu and Mehmet Dogan who defended their Ph.D.s successfully on March 1st and March 7th, respectively.
January 9, 2017
SnTe is a topological crystalline insulator.  This paper describes growth of films on SrTiO3 substrates and characterization including STM (which is compared to theory).  ...
December 1, 2016
Amazingly, SiO2 can be made into a stable 2D material!  Here, we mainly study how strain affects the structure of 2D silica and how counter-ions also affect structural...
September 30, 2016
PRL published on RIXS studies of charge-transfer interfaces of nickelates.  Most of the large orbital polarization stems from anisotropic hybridization of Ni and O orbitals...