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These are materials whose properties can be tailored through state-of-the-art growth techniques, such as oxide molecular beam epitaxy, which allow us to control these materials at an atom-by-atom level. These tuning parameters include epitaxial strain and interfacial engineering which can realize new quantum states of matter that cannot be achieved in bulk single crystal form.

   Some of the topics being studied include : metal-insulator transitions in correlated  materials, electronic reconstructions in oxide interfaces and superlattices, and manipulating electronic properties many-body interactions through epitaxial strain in systems such as the ruthenates, manganites, and other transition metal oxides.

we gratefully acknowledge support from :

research @ shen group

collaborations

We are fortunate to collaborate with a large number of excellent research groups, not only within Cornell, but also internationally. We also form part of the Cornell Center of Materials Research's Interdisciplinary Research Group (IRG) on Controlling Complex Electronic Materials. In particular, our efforts on combined MBE and ARPES are done in close collaboration with Darrell Schlom's group in Materials Science and Engineering.

  1. Darrell Schlom, Materials Science and Engineering (IRG)

  2. David Muller, Applied & Engineering Physics (IRG)

  3. Craig Fennie, Applied & Engineering Physics (IRG)

  4. Eun-Ah Kim, Physics (IRG)

  5. J.C. Seamus Davis, Physics (IRG)

  6. Jiwoong Park, Chemistry & Chemical Biology

  7. David Hawthorn, University of Waterloo

  8. Jochen Geck, IFW Dresden

  9. Graeme Luke, McMaster University

  10. Jochen Mannhart, Max Planck Institute - Stuttgart

  11. Felix Baumberger, University of Geneva

  12. George Sawatzky, University of British Columbia

  13. Tom Regier, Canadian Light Source

  14. Andy Mackenzie, Max Planck Institute - Dresden

Our group is interested in a wide range of quantum materials which exhibit novel electronic properties and ground states. Below are a few topics of particular interest in our lab. 

    Many of our projects are made possible by an integrated oxide molecular beam epitaxy system (MBE) and angle-resolved photoemission system (ARPES). This MBE-ARPES system allows us to rapidly transport thin films through UHV conditions into our ARPES system for immediate measurements. This system is operated jointly with Darrell Schlom's group in Materials Science and Engineering.   

    We are also fortunate to take advantage of the many characterization facilities available through the Cornell Center for Materials Research. These include a Quantum Design Physical Properties Measurement System (PPMS), x-ray facilities, and optical spectrometers (FTIR and UV-VIS).

    Our group also performs synchrotron-based experiments at the Canadian Light Source, the Advanced Light Source, the Stanford Synchrotron Radiation Laboratory, the Cornell High Energy Synchrotron Source, and international facilties such as BESSY (Berlin).

We are actively synthesizing and investigating new unconventional superconductors, often taking advantage of our MBE-ARPES system (described below). This includes the archetypal cuprate "infinite layer" compound, SrCuO2, and also new interfacial superconductors and metastable compounds that can be epitaxially stabilized through MBE. We also have an ongoing research effort on heavy fermion materials and other bulk exotic oxide superconductors.