John Indergaard
Graduate Student
B.S. Physics, Georgia Institute of Technology, 2013
M.S. Physics, Georgia Institute of Technology, 2015
Research Interests

Research Interests:

Metal cluster physics approaches condensed matter physics in a unique way: it attempts to explain and organize metallic properties by tracing their evolution from the atom to the bulk. Cluster sources produce a broad distribution of cluster sizes ranging from two atom dimers all the way up to tens of thousands of atoms. This allows the properties of clusters to be measured as a function of cluster size. For example, the electric polarizability is measured for a series of clusters with chemical composition MN, where N varies from 1 to typically several hundred. Examination of these trends provides information on the bulk evolution of this property and directly connects atomic and molecular properties with their bulk counterparts.

Our recent measurements of the electric polarizability of the ground states of 35 atoms, 30 of which were never measured before, adds to the existing 23 that were previously measured; more than doubling the existing knowledge of experimentally determined atomic polarizabilities. [Phys. Rev. A 91, 010501(R) (2015)]

  1. Lei Ma, Ramiro Moro, Baiqian Zhang, John Indergaard, Ilia Larkin, Hannu Häkkinen, Markus Kindermann, & Walt de Heer, Novel Magnetic Properties of Pure Small Gold Clusters [currently in preparation]
  2. Lei Ma, Antti Karttunen, John Indergaard, Baiqian Zhang, Hannu Häkkinen, & Walt de Heer, Magnetic Properties of a Very Small Gold System: Au3CO [currently in preparation]
  3. Lei Ma, John Indergaard, Baiqian Zhang, Ilia Larkin, Ramiro Moro, & Walt de Heer, Measured Atomic Ground-State Polarizabilities of 35 Metallic Elements, Physical Review A 91, 010501(R) (2015)
  4. David R. Ballantyne, Jonathan N. Armour, & John Indergaard, The Star Formation Laws of Eddington-Limited Star-Forming Disks, The Astrophysical Journal 765, 138 (2013)


Memberships and Committees:

American Physical Society