scholarly journals Persistent spin excitations in doped antiferromagnets revealed by resonant inelastic light scattering

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
C. J. Jia ◽  
E. A. Nowadnick ◽  
K. Wohlfeld ◽  
Y. F. Kung ◽  
C.-C. Chen ◽  
...  
Keyword(s):  
Light Scattering ◽  
Inelastic Light Scattering ◽  
Spin Excitations

Spin excitations in few-electrons AlGaAs/GaAs quantum dots probed by inelastic light scattering

2006 ◽  
Vol 34 (1-2) ◽  
pp. 304-307 ◽  
Author(s):  
César Pascual García ◽  
Vittorio Pellegrini ◽  
Aron Pinczuk ◽  
Massimo Rontani ◽  
Guido Goldoni ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Scattering ◽  
Inelastic Light Scattering ◽  
Spin Excitations

Inelastic light scattering of hole spin excitations in p-modulation-doped GaAs-AlGaAs single quantum wells

2011 ◽  
Author(s):  
Michael Hirmer ◽  
Marika Hirmer ◽  
Tobias Korn ◽  
Dieter Schuh ◽  
Werner Wegscheider ◽  
...  
Keyword(s):  
Light Scattering ◽  
Quantum Wells ◽  
Single Quantum ◽  
Inelastic Light Scattering ◽  
Spin Excitations

The Spin Excitation Spectrum in Quantum Hall Systems: Insights from Light Scattering Experiments

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1209-1218 ◽  
Author(s):  
YANN GALLAIS ◽  
THOMAS H. KIRSCHENMANN ◽  
JUN YAN ◽  
ARON PINCZUK ◽  
LOREN N. PFEIFFER ◽  
...  
Keyword(s):  
Light Scattering ◽  
Quantum Hall ◽  
Spin Excitation ◽  
Composite Fermions ◽  
Zeeman Energy ◽  
Fractional Quantum ◽  
Fractional Quantum Hall ◽  
Quantum Hall Systems ◽  
Inelastic Light Scattering ◽  
Spin Excitations

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.

An unified approach to inelastic light scattering in Keldysh–Schwinger functional integral formalism

2015 ◽  
Vol 29 (07) ◽  
pp. 1550040 ◽  
Author(s):  
Hyun Cheol Lee
Keyword(s):  
Light Scattering ◽  
Cross Sections ◽  
Golden Rule ◽  
Functional Integral ◽  
Integral Formalism ◽  
Inelastic Light Scattering ◽  
Scattering Geometry ◽  
The One ◽  
Resonant Part ◽  
Functional Integral Formalism

We propose a theoretical framework which can treat the nonresonant and the resonant inelastic light scattering on an equal footing in the form of correlation function, employing Keldysh–Schwinger functional integral formalism. The interference between the nonresonant and the resonant process can be also incorporated in this framework. This approach is applied to the magnetic Raman scattering of two-dimensional antiferromagnetic insulators. The entire set of the scattering cross-sections are obtained at finite temperature, the result for the resonant part agrees with the one obtained by the conventional Fermi golden rule at zero temperature. The interference contribution is shown to be very sensitive to the scattering geometry and the band structure.

scholarly journals THEORY OF ELECTRON SPECTROSCOPIES IN STRONGLY CORRELATED SEMICONDUCTOR QUANTUM DOTS

2006 ◽  
Vol 20 (30n31) ◽  
pp. 5311-5320 ◽  
Author(s):  
MASSIMO RONTANI
Keyword(s):  
Quantum Dots ◽  
Light Scattering ◽  
Strong Correlation ◽  
Finite Size ◽  
Semiconductor Quantum Dots ◽  
Strongly Correlated ◽  
Wigner Crystallization ◽  
Inelastic Light Scattering

Quantum dots may display fascinating features of strong correlation such as finite-size Wigner crystallization. We here review a few electron spectroscopies and predict that both inelastic light scattering and tunneling imaging experiments are able to capture clear signatures of crystallization.

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