TY - JOUR
T1 - Effects of in-plane magnetic field direction on the nuclear-spin relaxation in the ν = frac(2, 3) quantum Hall state
AU - Iwata, K.
AU - Morino, M.
AU - Fukuda, A.
AU - Suzuki, M.
AU - Ezawa, Z. F.
AU - Sawada, A.
AU - Kumada, N.
AU - Hirayama, Y.
N1 - Funding Information:
We are grateful to T. Saku for growing the sample and K. Muraki and T. Sato for useful discussion. This work was supported in part by Grants-in-Aid for the Scientific Research (Nos. 14010839, 14340088, 18740181, 18340088, 18043012) and a 21st Century COE Program Grant of the International COE of Exploring New Science Bridging Particle-Matter Hierarchy from Ministry of Education, Culture, Sports, Science and Technology. K. Iwata thanks Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists.
PY - 2008/3
Y1 - 2008/3
N2 - We investigated effects of the direction of in-plane magnetic field B∥ on the phase transition in the quantum Hall ferromagnet at Landau-level filling factor ν = frac(2, 3) by the nuclear-spin relaxation measurements. We controlled the angle φ between the direction of B∥ and a current I; when B∥ is parallel (perpendicular) to I, φ = 0{ring operator}(φ = 90{ring operator}) . We found that the nuclear spin relaxation rate T1- 1 at φ = 0{ring operator} is about twice as much as that at φ = 90{ring operator}. We discuss the anisotropic behavior of T1- 1 in term of a suppression of low-frequency electron spin fluctuations by B∥ at φ = 90{ring operator}.
AB - We investigated effects of the direction of in-plane magnetic field B∥ on the phase transition in the quantum Hall ferromagnet at Landau-level filling factor ν = frac(2, 3) by the nuclear-spin relaxation measurements. We controlled the angle φ between the direction of B∥ and a current I; when B∥ is parallel (perpendicular) to I, φ = 0{ring operator}(φ = 90{ring operator}) . We found that the nuclear spin relaxation rate T1- 1 at φ = 0{ring operator} is about twice as much as that at φ = 90{ring operator}. We discuss the anisotropic behavior of T1- 1 in term of a suppression of low-frequency electron spin fluctuations by B∥ at φ = 90{ring operator}.
KW - Fractional quantum Hall state
KW - Nuclear spin
KW - Tilted magnetic fields
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U2 - 10.1016/j.physe.2007.08.113
DO - 10.1016/j.physe.2007.08.113
M3 - Article
AN - SCOPUS:39649116436
SN - 1386-9477
VL - 40
SP - 1175
EP - 1177
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
IS - 5
ER -