scholarly journals Coupling parameters of many-body interactions for the Al(100) surface state: A high-resolution angle-resolved photoemission spectroscopy study

2011 ◽  
Vol 84 (15) ◽  
Author(s):  
J. Jiang ◽  
K. Shimada ◽  
H. Hayashi ◽  
H. Iwasawa ◽  
Y. Aiura ◽  
...  
Keyword(s):  
High Resolution ◽  
Surface State ◽  
Photoemission Spectroscopy ◽  
Spectroscopy Study ◽  
Many Body ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Coupling Parameters ◽  
Many Body Interactions

Non-equilibrium Dirac carrier dynamics in graphene investigated with time- and angle-resolved photoemission spectroscopy

2014 ◽  
Vol 171 ◽  
pp. 311-321 ◽  
Author(s):  
Isabella Gierz ◽  
Stefan Link ◽  
Ulrich Starke ◽  
Andrea Cavalleri
Keyword(s):  
Impact Ionization ◽  
Single Photon ◽  
Carrier Dynamics ◽  
Photoemission Spectroscopy ◽  
Many Body ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Self Energy ◽  
Carrier Multiplication ◽  
Electron Hole Pair ◽  
Many Body Interactions

We have used time- and angle-resolved photoemission spectroscopy (tr-ARPES) to assess the influence of many-body interactions on the Dirac carrier dynamics in graphene. From the energy-dependence of the measured scattering rates we directly determine the imaginary part of the self-energy, visualizing the existence of a relaxation bottleneck associated with electron–phonon coupling. A comparison with static line widths obtained by high-resolution ARPES indicates that the dynamics of photo-excited carriers in graphene are solely determined by the equilibrium self-energy. Furthermore, the subtle interplay of different many-body interactions in graphene may allow for carrier multiplication, where the absorption of a single photon generates more than one electron-hole pair via impact ionization. We find that, after photo-excitation, the number of carriers in the conduction band along the ΓK-direction keeps increasing for about 40 fs after the pump pulse is gone. A definite proof of carrier multiplication in graphene, however, requires a more systematic study, carefully taking into account the contribution of momentum relaxation on the measured rise time.

Spin- and angle-resolved photoemission spectroscopy study of the Au(111) Shockley surface state

2004 ◽  
Vol 137-140 ◽  
pp. 119-123 ◽  
Author(s):  
Matthias Muntwiler ◽  
Moritz Hoesch ◽  
Vladimir N. Petrov ◽  
Matthias Hengsberger ◽  
Luc Patthey ◽  
...  
Keyword(s):  
Surface State ◽  
Photoemission Spectroscopy ◽  
Spectroscopy Study ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Shockley Surface State

scholarly journals Energy band and spin-dependent many-body interactions in ferromagnetic Ni(110): A high-resolution angle-resolved photoemission study

2005 ◽  
Vol 72 (21) ◽  
Author(s):  
Mitsuharu Higashiguchi ◽  
Kenya Shimada ◽  
Keisuke Nishiura ◽  
Xiaoyu Cui ◽  
Hirofumi Namatame ◽  
...  
Keyword(s):  
High Resolution ◽  
Energy Band ◽  
Many Body ◽  
Photoemission Study ◽  
Many Body Interactions
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