Dr Clemens Ulrich

Phone: +61 2 97179786
Email: ulrich@phys.unsw.edu.au

Clemens Ulrich started his scientific research with Raman Light Scattering in semiconductors
under high hydrostatic pressure in 1994 at the Max-Planck institute for solid state research in
Stuttgart, where he performed his PhD thesis in the group of M. Cardona.

The main topics of his research in the last 10 years were strongly correlated electron systems like
unconventional superconductors or transition metal oxides. Of special interest were the effects of
spin, charge, and orbital correlations in 3-dimensional perovskite systems with partly occupied
3d-electronic levels. The used experimental techniques were inelastic neutron scattering,
Raman lights scattering, and resonant inelastic x-ray scattering (ESRF/Grenoble and PSI/Switzerland).
The combination of these complementary techniques allowed to yield a detailed insight in the physics
behind strongly correlated electron systems.

Clemens was the group leader of the Raman laboratories at the Max-Planck Institute in Stuttgart.
He was involved in inelastic neutron scattering experiments (triple-axis-spectrometers and
time-of-flight spectrometers). In order to determine the crystallographic and magnetic
structure Clemens has also carried out neutron and synchrotron x-ray diffraction experiments
in close collaboration with Dr. M. Reehuis at the Hahn-Meitner Institute in Berlin and Dr. P. Pattison
at the ESRF in Grenoble.

Clemens has more than 55 refereed publications in high-impact journals in magnetism, strongly
correlated electron materials and condensed matter physics. His Hirsch index is 17.

Clemens joined ANSTO in April 2009 in a joint position with the University of New South Wales
in Sydney. He will perform neutron scattering experiments at the OPAL research reactor at ANSTO and
Raman light scattering experiments at the UNSW in Sydney.
 

Ten career-best publications

C. Ulrich, G. Ghiringhelli, A. Piazzagalli, L. Braicovich, N.B. Brookes, H. Roth, T. Lorenz and B. Keimer
Orbital excitations in YTiO3 and LaTiO3 probed by resonant inelastic x-ray scattering
Phys. Rev. B 77, 113102 (2008)

C. Ulrich, A. Gössling, M. Grüninger, M. Guennou, H. Roth, M. Cwik, T. Lorenz, G. Khaliullin and B. Keimer
Raman Scattering in the Mott Insulators LaTiO3 and YTiO3: Evidence for Orbital Excitations
Phys. Rev. Lett. 97, 157401 (2006)

S. Pailhes, C. Ulrich, B. Fauque, V. Hinkov, Y. Sidis, A. Ivanov, C.T. Lin, B. Keimer and P. Bourges
Doping Dependence of Bilayer Resonant Spin Excitations in (Y,Ca)Ba2Cu3O6+x
Phys. Rev. Lett. 96, 257001 (2006)

C. Ulrich, G. Khaliullin, J. Sirker, M. Reehuis, M. Ohl, S. Miyasaka, Y. Tokura and B. Keimer
Magnetic neutron scattering study of YVO3: Evidence for an orbital Peierls state
Phys. Rev. Lett. 91, 257202 (2003)

C. Ulrich, G. Khaliullin, S. Okamoto, M. Reehuis, A. Ivanov, H. He, Y. Taguchi, Y. Tokura and B. Keimer
Magnetic order and dynamics in an orbitally degenerate ferromagnetic insulator
Phys. Rev. Lett. 89, 167202 (2002)

H. He, P. Bourges, Y. Sidis, C. Ulrich, L.P. Regnault, S. Pailhes, N.S. Berzigiarova, N.N. Kolesnikov and B. Keimer
Magnetic resonant mode in the single-layer high-temperature superconductor Tl2Ba2CuO6+d
Science 295, 1045 (2002)

Y. Sidis, C. Ulrich, P. Bourges, C. Bernhard, C. Niedermayer, L.P. Regnault, N.H. Andersen and B. Keimer
Antiferromagnetic ordering in superconducting YBa2Cu3O6.5
Phys. Rev. Lett. 86, 4100 (2001)

J.W. Lynn, B. Keimer, C. Ulrich, C. Bernhard and J.L. Tallon
Antiferromagnetic ordering of Ru and Gd in superconducting RuSr2GdCu2O8
Phys. Rev. B 61, R14964 (2000)

C. Ulrich, A. Göbel, K. Syassen, and M. Cardona,
Pressure-induced disappearance of the Raman anomaly in CuCl
Phys. Rev. Lett. 82, 351 (1999)

C. Ulrich, E. Anastassakis, K. Syassen, A. Debernardi and M. Cardona
Lifetime of phonons in semiconductors under pressure
Phys. Rev. Lett. 78, 1283 (1997)