# Constantine Stassis

Constantine Stassis Professor (retired) - Iowa State University, USASenior Physicist (retired) - Ames Lab - USDOE Ph. D. 1970, Massachusetts Institute of Technology |

**RESEARCH INTERESTS**

- Neutron diffraction from magnetic crystals; polarized neutron investigation of spin densities in metals; spin waves in metals; lattice dynamics.

**SELECTED PUBLICATIONS**

- M. Bullock, J. Zarestky, C. Stassis, A. Goldman, P. Canfield, Z. Honda. G. Shirane, S.M. Shapiro, “Low Energy Phonon Excitations in Superconducting RENi
_{2}B_{2}C (RE=Lu,Y),”*Phys. Rev. B***57**, 7916 (1998). - M. Bullock, C. Stassis, J. Zarestky, A. I. Goldman, P. Canfield, G. Shirane, S. Shapiro, “Inelastic Neutron Scattering Studies of the Low-Energy Phonon Excitations in the RENi
_{2}B_{2}C Superconductors,”*Physica B***241-243**, 798 (1998) - C. Stassis, J. Zarestky, A. Goldman, P. Canfield, G. Shirane, S. Shapiro, “Anomalous Phonons Below T
_{c}in Superconducting RNi_{2}B_{2}C (R = Lu, Y),*Physica C***317-318**, 127 (1999). - J. Zarestky, C. Stassis, A. Goldman, P. Canfield, G. Shirane, S. Shapiro, “Phonon Profiles in Superconducting Yni
_{2}B_{2}C and LuNi_{2}B_{2}C,”*Phys. Rev. B***60**, 11932 (1999). - S. H. Lee, C. F. Majkwzak, S. K. Sinha, C. Stassis, H. Kawano, G. Lander, P. Brown, H. F. Fong, S. W. Cheong, H. Matsushita, K. Yamada, Y. Endoh, “Search for Orbital Moments in Underdoped Cuprate Metals – A Sisyphian Experience,”
*Phys. Rev. B***60**, 10405 (1999)**.** - C. Stassis, “Techniques for the Study of Phonons,“ Section 14.7 in
*Methods of Materials Research*, John Wiley and Sons, Inc. (2000). - C. Stassis, “Inelastic Neutron Scattering,” in
*Handbook of Elastic Properties of Solids*Academic Press (New York, NY) (2001). - C. Stassis, "Neutron Scattering", in Handbook of Elastic Constants, Pergamon Press.
- C. Stassis, "Techniques for the study of phonons", Section 14.7 in Methods of Materials Research, John Wiley and Sons, Inc. (2000).
- Ll. Mañosa, J. Zarestky, M. Bullock, and C. Stassis, Low lying phonon dispersion curves of Cu3Al(+Be), Phys. Rev. B 59, 9239 (1999).
- C. Stassis, J. Zarestky, A. Goldman, P. Canfield, G. Shirane, and S. Shapiro, Anomalous honons below Tc in superconducting RNi2B2C (R = Lu, Y), Physica C 317-318, 127 (1999).
- J. Zarestky, C. Stassis, A. Goldman, P. Canfield, G. Shirane, and S. Shapiro, Phonon profiles in superconducting YNi2B2C and LuNi2B2C, Phys. Rev. B 60, 11932 (1999).
- U. Yaron, P. L. Gammel, A. P. Ramirez, D. A. Huse, D. J. Bishop, A. I. Goldman, C.Stassis, P. C. Canfield, K., Mortenson, M. R. Eskildsen Observation of a square flux-line lattice in the magnetic superconductor ErNi
_{2}B_{2}C,*Nature***382**, 236 (1996).

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