Quantum size effect of 2DEG confined within BaTiO3/SrTiO 3: Nb Superlattices

Yuki Nakanishi; Hiromichi Ohta; Teruyasu Mizoguchi; Yuichi Ikuhara; Kunihito Koumoto

Quantum size effect of 2DEG confined within BaTiO₃/SrTiO ₃: Nb Superlattices

Yuki Nakanishi, Hiromichi Ohta, Teruyasu Mizoguchi, Yuichi Ikuhara, Kunihito Koumoto

研究成果: Conference article › 査読

抄録

Carrier transport properties such as carrier concentration (n_e), Hall mobility (μ_Hall) and Seebeck coefficient (S) for the superlattices of [(BaTiO₃)_x/(SrTi_0.7Nb _0.3O₃)₁]_z (x = 1, 4, 6, 9 and 15) were measured to clarify the critical barrier thickness for the electron confinement in a unit cell layer thickness of SrTi_0.7Nb _0.3O₃. The μ_Hall values drastically decreased with the x-value due to the Ba-alloying occurred. We observed enhancement of |S| value in BaTiO₃/SrTi_1-xNb _xO₃ superlattices due to the quantum size effect, which is similar to SrTiO₃/SrTi_0.8Nb_0.2O₃ superlattices. Critical BaTiO₃ layer thickness for fully confinement of the conduction electron significantly decreased (6 unit cells) as compared to that of SrTiO₃/SrTi_0.8Nb_0.2O₃ superlattices.

本文言語	English
ページ（範囲）	375-380
ページ数	6
ジャーナル	Materials Research Society Symposium Proceedings
巻	1044
出版ステータス	Published - 2008 10 9
イベント	Thermoelectric Power Generation - Boston, MA, United States 継続期間: 2007 11 26 → 2007 11 29

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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引用スタイル

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title = "Quantum size effect of 2DEG confined within BaTiO3/SrTiO 3: Nb Superlattices",

abstract = "Carrier transport properties such as carrier concentration (ne), Hall mobility (μHall) and Seebeck coefficient (S) for the superlattices of [(BaTiO3)x/(SrTi0.7Nb 0.3O3)1]z (x = 1, 4, 6, 9 and 15) were measured to clarify the critical barrier thickness for the electron confinement in a unit cell layer thickness of SrTi0.7Nb 0.3O3. The μHall values drastically decreased with the x-value due to the Ba-alloying occurred. We observed enhancement of |S| value in BaTiO3/SrTi1-xNb xO3 superlattices due to the quantum size effect, which is similar to SrTiO3/SrTi0.8Nb0.2O3 superlattices. Critical BaTiO3 layer thickness for fully confinement of the conduction electron significantly decreased (6 unit cells) as compared to that of SrTiO3/SrTi0.8Nb0.2O3 superlattices.",

author = "Yuki Nakanishi and Hiromichi Ohta and Teruyasu Mizoguchi and Yuichi Ikuhara and Kunihito Koumoto",

year = "2008",

month = oct,

day = "9",

language = "English",

volume = "1044",

pages = "375--380",

journal = "Materials Research Society Symposium - Proceedings",

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TY - JOUR

T1 - Quantum size effect of 2DEG confined within BaTiO3/SrTiO 3

T2 - Thermoelectric Power Generation

AU - Nakanishi, Yuki

AU - Ohta, Hiromichi

AU - Mizoguchi, Teruyasu

AU - Ikuhara, Yuichi

AU - Koumoto, Kunihito

PY - 2008/10/9

Y1 - 2008/10/9

N2 - Carrier transport properties such as carrier concentration (ne), Hall mobility (μHall) and Seebeck coefficient (S) for the superlattices of [(BaTiO3)x/(SrTi0.7Nb 0.3O3)1]z (x = 1, 4, 6, 9 and 15) were measured to clarify the critical barrier thickness for the electron confinement in a unit cell layer thickness of SrTi0.7Nb 0.3O3. The μHall values drastically decreased with the x-value due to the Ba-alloying occurred. We observed enhancement of |S| value in BaTiO3/SrTi1-xNb xO3 superlattices due to the quantum size effect, which is similar to SrTiO3/SrTi0.8Nb0.2O3 superlattices. Critical BaTiO3 layer thickness for fully confinement of the conduction electron significantly decreased (6 unit cells) as compared to that of SrTiO3/SrTi0.8Nb0.2O3 superlattices.

AB - Carrier transport properties such as carrier concentration (ne), Hall mobility (μHall) and Seebeck coefficient (S) for the superlattices of [(BaTiO3)x/(SrTi0.7Nb 0.3O3)1]z (x = 1, 4, 6, 9 and 15) were measured to clarify the critical barrier thickness for the electron confinement in a unit cell layer thickness of SrTi0.7Nb 0.3O3. The μHall values drastically decreased with the x-value due to the Ba-alloying occurred. We observed enhancement of |S| value in BaTiO3/SrTi1-xNb xO3 superlattices due to the quantum size effect, which is similar to SrTiO3/SrTi0.8Nb0.2O3 superlattices. Critical BaTiO3 layer thickness for fully confinement of the conduction electron significantly decreased (6 unit cells) as compared to that of SrTiO3/SrTi0.8Nb0.2O3 superlattices.

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JO - Materials Research Society Symposium - Proceedings

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