Light Scattering from Charge and Spin Excitations in Cuprate Systems

Author(s):  
Rudi Hackl
2011 ◽  
Vol 109 (7) ◽  
pp. 07B901 ◽  
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M. Madami ◽  
G. Carlotti ◽  
G. Gubbiotti ◽  
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C.-C. Chen ◽  
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2010 ◽  
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Federico Montoncello ◽  
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Loris Giovannini ◽  
Fabrizio Nizzoli ◽  
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Vittorio Pellegrini ◽  
Aron Pinczuk ◽  
Massimo Rontani ◽  
Guido Goldoni ◽  
...  

2007 ◽  
Vol 19 (22) ◽  
pp. 225008 ◽  
Author(s):  
Loris Giovannini ◽  
Federico Montoncello ◽  
Roberto Zivieri ◽  
Fabrizio Nizzoli

2011 ◽  
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Marika Hirmer ◽  
Tobias Korn ◽  
Dieter Schuh ◽  
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Z.V. Popović

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YANN GALLAIS ◽  
THOMAS H. KIRSCHENMANN ◽  
JUN YAN ◽  
ARON PINCZUK ◽  
LOREN N. PFEIFFER ◽  
...  

Collective spin excitations in quantum Hall systems are studied via inelastic light scattering. In the fractional quantum Hall effect regime, composite fermion spin excitations are observed in the range 1/3< ν <2/5. They reveal a transition from free to strongly interacting composite fermions. At ν=1, a shift of the spin-wave energy at finite wavevector from the bare Zeeman energy is observed. It allows us to evaluate the spin-stiffness of the quantum Hall ferromagnet.


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