TY - JOUR
T1 - Bilayer ν = 2 quantum Hall state in parallel high magnetic field
AU - Sawada, A.
AU - Ezawa, Z. F.
AU - Ohno, H.
AU - Horikoshi, Y.
AU - Kumada, N.
AU - Ohno, Y.
AU - Kishimoto, S.
AU - Matsukura, F.
AU - Nagahama, S.
N1 - Funding Information:
We thank T. Saku (NTT) for growing the sample used in the present work. Part of this work was done at Laboratory for Electronic Intelligent Systems, RIEC, Tohoku University. The research was supported in part by Grant-in-Aids for the Scientific Research from the Ministry of Education, Science, Sports and Culture (11304019, 09244103, 10138203), and by the Asahi Glass Foundation.
PY - 2000/2
Y1 - 2000/2
N2 - By tilting the sample as well as by varying density difference between the two layers, we have measured the activation energy of a bilayer quantum Hall state as a function of the total magnetic field. Let Θ be the tilt angle. When the densities are balanced, the activation energy begins to increase linearly beyond a certain critical angle Θ* as the total magnetic field increases. The slope of the curve is 5.6|g*|μB, from which we conclude that a skyrmion pair with spin 5.6 is excited. On the other hand, as the density difference increases, the activation energy decreases rapidly and eventually disappears. These results imply that the bilayer QH state is not a coherent state but rather a compound state beyond the critical angle (Θ>Θ*).
AB - By tilting the sample as well as by varying density difference between the two layers, we have measured the activation energy of a bilayer quantum Hall state as a function of the total magnetic field. Let Θ be the tilt angle. When the densities are balanced, the activation energy begins to increase linearly beyond a certain critical angle Θ* as the total magnetic field increases. The slope of the curve is 5.6|g*|μB, from which we conclude that a skyrmion pair with spin 5.6 is excited. On the other hand, as the density difference increases, the activation energy decreases rapidly and eventually disappears. These results imply that the bilayer QH state is not a coherent state but rather a compound state beyond the critical angle (Θ>Θ*).
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U2 - 10.1016/S1386-9477(99)00129-0
DO - 10.1016/S1386-9477(99)00129-0
M3 - Conference article
AN - SCOPUS:0034139144
SN - 1386-9477
VL - 6
SP - 615
EP - 618
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
IS - 1
T2 - 13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13)
Y2 - 1 August 1999 through 6 August 1999
ER -