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

VL - 40

SP - 1175

EP - 1177

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

SN - 1386-9477

IS - 5

ER -