Splitting of long-wavelength modes of the fractional quantum hall liquid at nu = 1/3.
Resonant inelastic light scattering experiments at nu = 1/3 reveal a novel splitting of the long-wavelength modes in the low energy spectrum of quasi-particle excitations in the charge degree of freedom. We find a single peak at small wave vectors that splits into two distinct modes at larger wave vectors. The evidence of well-defined dispersive behavior at small wave vectors indicates a coherence of the quantum fluid in the micron length scale. We evaluate interpretations of long-wavelength modes of the electron liquid.
Hirjibehedin
C F
CF
Department of Physics, Columbia University, New York, New York 10027, USA.
Dujovne
Irene
I
Pinczuk
A
A
Dennis
B S
BS
Pfeiffer
L N
LN
West
K W
KW