Non-volatile ferroelectric control of ferromagnetism in (Ga, Mn)As (2008)
Stolichnov, I., Riester, S. W. E., Trodahl, H. J., Setter, N., Rushforth, A. W., Edmonds, K. W., ...
Raman spectroscopy of (K,Na)NbO3 and ((K,Na)1-xLix)NbO3 (2008)
Trodahl, H. J., Klein, N., Damjanovic, D., Setter, N., Ludbrook, B., Rytz, D., ...
A Raman scattering spectroscopy study is reported through all four phases of a (K0.5Na0.5)NbO3 crystal and ((K0.5Na0.5)1-xLix)NbO3 for x=0.02 and 0.03. The transitions among the ferroelectric phases...
Near-Zero Moment Ferromagnetism in the Semiconductor SmN (2008)
Meyer, C., Ruck, B. J., Zhong, J., Granville, S., Preston, A. R. H., Williams, G. V. M., ...
The magnetic behaviour of SmN has been investigated in stoichiometric polycrystalline films. All samples show ferromagnetic order with Curie temperature (T_c) of 27 +/- 3 K, evidenced by the...
Imaging a 1-electron InAs quantum dot in an InAs/InP nanowire (2008)
Bleszynski-Jayich, A. C., Froberg, L. E., Bjork, M. T., Trodahl, H. J., Samuelson, L., Westervelt, R. M.
Nanowire heterostructures define high-quality few-electron quantum dots for nanoelectronics, spintronics and quantum information processing. We use a cooled scanning probe microscope (SPM) to image...
Nonvolatile ferroelectric control of ferromagnetism in (Ga,Mn)As (2008)
Stolichnov, I., Riester, S. W. E., Trodahl, H. J., Setter, N., Rushforth, A. W., Edmonds, K. W., ...
There is currently much interest in materials and structures that provide coupled ferroelectric and ferromagnetic responses, with a long-term goal of developing new memories and spintronic logic...
Ferroelectric domains and piezoelectricity in monocrystalline Pb(Zr,Ti)O-3 nanowires (2007)
Wang, J., Sandu, C. S., Colla, E., Wang, Y., Ma, W., Gysel, R., ...
Ferromagnetic redshift of the optical gap in GdN (2007)
Trodahl, H. J., Preston, A. R. H., Zhong, J., Ruck, B. J., Strickland, N., Mitra, C., ...
We report measurements of the optical gap in a GdN film at temperatures from 300 to 6K, covering both the paramagnetic and ferromagnetic phases. The gap is 1.31eV in the paramagnetic phase and...
Comparison between experiment and calculated band structures for DyN and SmN (2007)
Preston, A. R. H., Granville, S., Housden, D. H., Ludbrook, B., Ruck, B. J., Trodahl, H. J., ...
We investigate the electronic band structure of two of the rare-earth nitrides, DyN and SmN. Resistivity measurements imply that both materials have a semiconducting ground state, and both show...
Low-energy excitations in La1.2Sr1.8Mn2O7 investigated by ellipsometry (2005)
Mercier, O. R., Buckley, R. G., Trodahl, H. J., Bernhard, C., Balakrishnan, G.
Quantitative study of molecular N_2 trapped in disordered GaN:O films (2004)
Ruck, B. J., Koo, A., Lanke, U. D., Budde, F., Granville, S., Trodahl, H. J., ...
The structure of disordered GaN:O films grown by ion-assisted deposition is investigated using x-ray absorption near-edge spectroscopy and Raman spectroscopy. It is found that between 4 and 21 % of...
Stabilization of amorphous GaN by oxygen (2004)
Budde, F., Ruck, B. J., Koo, A., Granville, S., Trodahl, H. J., Bittar, A., ...
Ion assisted deposition (IAD) has been investigated for the growth of GaN, and the resulting films studied by x-ray diffraction and absorption spectroscopy and by transmission electron microscopy....
The effect of Cu substitution on the A1g mode of La(0.7)Sr(0.3)MnO3 manganites (2003)
De Marzi, G., Trodahl, H. J., Bok, J., Cantarero, A., Sapina, F.
We report on the first Raman data of Cu substituted La(1-y)Sr(y)Mn(1-x)Cu(x)O3 (0 < x < 0.10 and 0.17 < y < 0.3, accordingly in order to have the same Mn(4+)/[Mn(4+)+Mn(3+)] ratio), collected in the...
Engel, Andreas, Trodahl, H. J.
Linear resistances and $IV$-characteristics have been measured over a wide range in the parameter space of the mixed phase of multilayered a-TaGe/Ge films. Three films with varying interlayer...
Williams, G. V. M., Dupree, R., Howes, A., Kramer, S., Trodahl, H. J., Jung, C. U., ...
We report the results from a thermopower and a Cu nuclear magnetic resonance (NMR) study of the infinite CuO2 layer electron doped high temperature superconducting cuprate (HTSC), Sr0.9La0.1CuO2. We...
Solar Radiative Heating in First Year Sea Ice (2000)
M. J. Mcguinness, K. A. Landman, H. J. Trodahl, A. E. Pantoja
Temperature measurements taken in young landfast Antarctic sea ice show daily oscillations consistent with heating by solar radiation. We present and solve a heat conduction model for the temperature...
Nonlinear Thermal Transport and Brine Convection in First Year Sea Ice M.J. McGuinness (2000)
M. J. Mcguinness, H. J. Trodahl, K. Collins, T. G. Haskell
We report the first results from a programme recently set up to directly measure the thermal conductivity of young sea ice. An array of thermistors frozen into first-year Antarctic sea ice provides...
On the 590cm-1 B1g feature in underdoped Bi2Sr2CaCu2O8+delta (1999)
Hewitt, Kevin C., Wang, N. L., Irwin, J. C., Pooke, D. M., Pantoja, A. E., Trodahl, H. J.
Raman scattering studies have been performed on underdoped Bi2Sr2CaCu2O8+delta. In single crystals underdoped by oxygen removal, a 590 cm-1 peak is observed in the B1g spectrum. The feature is...