Thermohydrodynamics in Quantum Hall Systems
量子霍尔系统中的热流体力学
基本信息
- 批准号:16540278
- 负责人:
- 金额:$ 2.25万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2004
- 资助国家:日本
- 起止时间:2004 至 2007
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1. A theory of thermohydrodynamics in two-dimensional electron systems in quantizing magnetic fields is developed including a nonlinear transport regime. Spatio-temporal variations of the electron temperature and the chemical potential in the local equilibrium are described by the equations of conservation with the number and thermal-energy flux densities. The theory is applied to calculate spatial variations of these variables in various systems as described in the following.2. Spatial distributions of the electron temperature perpendicular to the applied current are obtained in quantum Hall systems with compressible and incompressible strips at low lattice temperatures by solving equations of electron number conservation and energy conservation as well as Poisson's equation self-consistently. In the linear-response regime, variations of the electron temperature concentrate in the incompressible strips as the lattice temperature decreases. The electron temperature indicates an anti-symmetric distribution: it becomes lower than the lattice temperature in the side of a sample with a higher electrochemical potential, and higher in the opposite side. Reflecting the anti-symmetric distribution in the linear-response regime, the current density becomes highly asymmetric as the applied current increases to the breakdown of the quantum Hall effects.3. Spatial variations of the electron temperature in the vicinity of metallic current contacts in a quantum Hall system are calculated based on thermohydrodynamics. It is shown that, at larger currents, hot spots with high electron temperatures appear at diagonally opposite corners of the sample. At smaller currents, however, the electron temperature at one of the corners is lower than the lattice temperature, while that at the other is higher than the lattice temperature.
1.本文发展了量子化磁场中二维电子系统的热流体力学理论,其中包括非线性输运区。局域平衡态下电子温度和化学势的时空变化由电子数和热能通量密度的守恒方程描述。该理论被应用于计算这些变量在各种系统中的空间变化,如下所述。通过自洽求解电子数守恒方程、能量守恒方程和泊松方程,得到了低晶格温度下具有可压缩带和不可压缩带的量子霍尔系统中垂直于外加电流的电子温度的空间分布.在线性响应区域,随着晶格温度的降低,电子温度的变化集中在不可压缩条带中。电子温度表示反对称分布:在具有较高电化学电势的样品一侧,电子温度变得低于晶格温度,而在相反一侧,电子温度变得高于晶格温度。在线性响应区域,电流密度反映出反对称分布,随着施加电流的增加,电流密度变得高度不对称,直至量子霍尔效应击穿.基于热流体力学理论计算了量子霍尔系统中金属电流接触附近电子温度的空间变化。它示出,在较大的电流,具有高电子温度的热点出现在样品的对角。然而,在较小的电流下,其中一个角落的电子温度低于晶格温度,而另一个角落的电子温度高于晶格温度。
项目成果
期刊论文数量(59)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Electron Temperature Distribution and Hot Spots in Quantum Hall Systems
量子霍尔系统中的电子温度分布和热点
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:S.Kanamaru;H.Suzuura;H.Akera;H.Watanabe;T. Ise
- 通讯作者:T. Ise
量子ホール系の線形応答領域における電子温度・ポテンシャルの2次元空間分布
量子霍尔系统线性响应区电子温度和电势的二维空间分布
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:H. Akera;H. Suzuura;S. Kanamaru;T. Ise;金丸貞義;鈴浦秀勝
- 通讯作者:鈴浦秀勝
Spatial Variations of the Hall Potential and the Electron Temperature in Quantum Hall Systems with a Filling Factor Step
具有填充因子阶跃的量子霍尔系统中霍尔电势和电子温度的空间变化
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:安藤 恒也;秋本 浩一;安藤 恒也;H.Narita 他7名;T.Takasaki 他3名;H.Narita et al.;Y.T.Cui et al.;T.Rachi 他3名;T.Takasaki 他3名;Y.T.Cui 他13名;X.Y.Cu 他14名;H.Narita 他7名;H.Narita 他7名;M.Higashiguchi 他5名;M.Higashiguchi et al.;N.Kamakura 他7名;J.S.Tse 他6名;M.Higashiguchi 他5名;M.Itou他5名;T.Xie 他8名;T.Xie et al.;T.Xie他8名;Y.Aiura他9名;H.Sato他19名;Y. Nagai
- 通讯作者:Y. Nagai
Thermohydrodynamics in Quantum Hall Systems
量子霍尔系统中的热流体力学
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:S.Kanamaru;H.Suzuura;H.Akera;H.Watanabe;T. Ise;T.Kawarabayashi;H. Akera
- 通讯作者:H. Akera
Spatial Variations of the Electron Temperture in the Linear-Response Regime in Narrow Quantum Hall Systems
窄量子霍尔系统线性响应范围内电子温度的空间变化
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:H. Suzuura;H. Akera;H. Akera and H. Suzuura
- 通讯作者:H. Akera and H. Suzuura
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AKERA Hiroshi其他文献
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{{ truncateString('AKERA Hiroshi', 18)}}的其他基金
Current distribution and nonequilibrium phase transition in the breakdown of the quantum Hall effect
量子霍尔效应击穿中的电流分布和非平衡相变
- 批准号:
13640314 - 财政年份:2001
- 资助金额:
$ 2.25万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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