Publications (10)
Localized electronic states and photoemission superconducting condensate in BiSrCaCuO
Jian Ma, C. Quitmann, R. J. Kelley +2
We present the first detailed angle-resolved photoemission evidence that there are two types of carriers that contribute to the photoemission superconducting condensate in $Bi_{2}S…
INTERLAYER COUPLING AND THE METAL-INSULATOR TRANSITION IN Pr-SUBSTITUTED Bi(2)Sr(2)CaCu(2)O(8+y)
C. Quitmann, B. Beschoten, R. J. Kelley +2
Substitution of rare-earth ions for Ca in Bi2Sr2CaCu2O8+y is known to cause a metal-insulator transition. Using resonant photoemission we study how this chemical substitution affec…
Observation of a van Hove Singularity in with Angle Resolved Photoemission
Jian Ma, C. Quitmann, R. J. Kelley +4
We have performed high energy resolution angle-resolved photoemission studies of the normal state band structure of oxygen overdoped . We find that…
Localization Effects in Bi2Sr2Ca(Cu,Co)2O8+y High Temperature Superconductors
C. Quitmann, P. Almeras, Jian Ma +4
Doping Bi2Sr2Ca1Cu2O8+y with Co causes a superconductor-insulator transition. We study correlations between changes in the electrical resistivity RHOab(T) and the electronic bandst…
Structural and Magnetic Dynamics in the Magnetic Shape Memory Alloy NiMnGa
S. O. Mariager, C. Dornes, J. A. Johnson +11
Magnetic shape memory Heusler alloys are multiferroics stabilized by the correlations between electronic, magnetic and structural order. To study these correlations we use time res…
Temperature dependence of the superconducting gap anisotropy in BiSrCaCuO
Jian Ma, C. Quitmann, R. J. Kelley +3
We present the first detailed data of the momentum-resolved, temperature dependence of the superconducting gap of , complemented by similar data on…
Imaging the antiferromagnetic to ferromagnetic first order phase transition of FeRh
S. O. Mariager, L. Le Guyader, M. Buzzi +2
The antiferromagnetic (AFM) to ferromagnetic (FM) first order phase transition of an epitaxial FeRh thin-film has been studied with x-ray magnetic circular dichroism using photoemi…
Structural and magnetic dynamics of a laser induced phase transition in FeRh
S. O. Mariager, F. Pressacco, G. Ingold +11
We use time-resolved x-ray diffraction and magnetic optical Kerr effect to study the laser induced antiferromagnetic to ferromagnetic phase transition in FeRh. The structural respo…
Coherent phonon dynamics at the martensitic phase transition of Ni_2MnGa
S. O. Mariager, A. Caviezel, P. Beaud +2
We use time-resolved optical reflectivity to study the laser stimulated dynamics in the magnetic shape memory alloy Ni_2MnGa. We observe two coherent optical phonons, at 1.2 THz in…
Evolution of the quasiparticle spectral function in cuprates
S. Misra, R. Gatt, T. Schmauder +9
We analyzed photoemssion data for several doping levels of the Bi_2Sr_2CaCu_2O_{8+x} compounds, ranging from overdoped to underdoped. We show that the high frequency part of the sp…