Padraic Shafer
Staff Scientist, Program Lead
Dichroism, Photon Science Operations
Biographical Information
Education
| Ph. D., Materials Science and Engineering | University of California, Berkeley, CA | 2009 |
| M. S., Materials Science and Engineering | University of California, Berkeley, CA | 2006 |
| B. S., Materials Science and Engineering, with Highest Honors | University of Illinois at Urbana-Champaign, IL | 1999 |
Professional Experience
2012 – Present
Staff Research Scientist
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA
2009 – 2012
Postdoctoral Research Fellow
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA
2004 – 2009
Graduate Student Researcher
Department of Materials Science and Engineering – NSF Center of Integrated Nanomechanical Systems, University of California, Berkeley, CA
2002 – 2004
Process Integration Engineer
Logic & Embedded-RAM Alliance for Development, IBM Microelectronics, East Fishkill, NY
1999 – 2002
Process Development Engineer
DRAM Development Alliance, IBM Microelectronics, East Fishkill, NY
Research Interests
Padraic studies electronic order at domain walls and thin film interfaces in complex oxides and magnetic metals using a combination of resonant soft x-ray absorption and scattering. He also investigates spin-pumped dynamics in magnetic multilayers using x-ray based ferromagnetic resonance.
Selected Publications
P. Shafer*, P. García-Fernández*, P. Aguado-Puente, A. R. Damodaran, A. K. Yadav, C. T. Nelson, S.-L. Hsu, J. Wojdeł, J. Íñiguez, L. W. Martin, E. Arenholz, J. Junquera, and R. Ramesh, Emergent chirality in polar vortex superlattices, Proc. Natl. Acad. Sci. (Early ed. online, Jan. 2018) [doi: 10.1073/pnas.1711652115]
J. Li, L. R. Shelford, P. Shafer, A. Tan, J. X. Deng, P. S. Keatley, C. Hwang, E. Arenholz, G. van der Laan, R. J. Hicken, and Z. Q. Qiu, Direct detection of pure spin-current by x-ray pump-probe measurements, Phys. Rev. Lett. 117, 076602 (2016). [doi: 10.1103/PhysRevLett.117.076602]
J. He*, P. Shafer*, T. R. Mion*, V. T. Tra, Q. He, J. T. Kong, Y.-D. Chuang, W. L. Yang, M. J. Graf, J.-Y. Lin, Y.-H. Chu, E. Arenholz, and R.-H. He, Observation of a three-dimensional quasi-long-range electronic supermodulation in YBa2Cu3O7−x/La0.7Ca0.3MnO3 heterostructures, Nat. Commun. 7, 10852 (2016). [doi: 10.1038/ncomms10852]
Y. Cao, X. Liu, P. Shafer, S. Middey, D. Meyers, M. Kareev, Z. Zhong, J.W. Kim, P. J. Ryan, E. Arenholz, and J. Chakhalian, Anomalous orbital structure in a spinel–perovskite interface, npj Quantum Materials 1, 16009 (2016). [doi: 10.1038/npjquantmats.2016.9]
*These authors contributed equally.
