Orbital effects of strong magnetic field on a two-dimensional Holstein polaron

Subhasree Pradhan; Monodeep Chakraborty; A. Taraphder

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Orbital effects of strong magnetic field on a two-dimensional Holstein polaron

机译：强磁场对二维荷斯坦极化子的轨道效应

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We investigate the orbital effects of a strong external magnetic field on the ground-state properties of a two-dimensional (2D) Holstein polaron, employing variational approaches based on exact diagonalization. From the ground-state energy and the wave function, we calculate the electron-phonon correlation function, the average phonon number, and the Drude weight and investigate the evolution of a 2D Holstein polaron as a function of the magnetic flux. Although the external magnetic field affects the polaron throughout the parameter regime, we show that the magnetic field has a stronger effect on a loosely bound (spatially extended) polaron. We also find that the magnetic field can be used as a tuning parameter, particularly for a weakly coupled polaron, to reduce the spatial extent of a large polaron.

机译：我们使用基于精确对角线化的变分方法，研究了强外部磁场对二维（2D）Holstein极化子的基态特性的轨道效应。从基态能量和波函数，我们计算电子-声子相关函数，平均声子数和德鲁德权重，并研究二维Holstein极化子随磁通量的变化。尽管外部磁场会在整个参数范围内影响极化子，但我们表明磁场对松散结合（空间扩展）极化子的影响更大。我们还发现，磁场可以用作调整参数，特别是对于弱耦合极化子，可以减小大极化子的空间范围。

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《Physical review》 |2016年第11期|115109.1-115109.6|共6页
作者
Subhasree Pradhan; Monodeep Chakraborty; A. Taraphder;
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Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur - 721302, India;

Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur - 721302, India;

Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur - 721302, India,Center for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur - 721302, India;

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1. Orbital effects of strong magnetic field on a two-dimensional Holstein polaron [J] . Pradhan Subhasree, Chakraborty Monodeep, Taraphder A. Physical review, B . 2016,第11期

机译：强磁场对二维荷斯坦极化子的轨道效应
2. Interplay among spin, orbital effects, and localization in a GaAs two-dimensional electron gas in a strong in-plane magnetic field [J] . B. A. Piot, D. K. Maude, U. Gennser, Physical review . 2009,第11期

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3. Application of the Functional Schrodinger Picture Theory to the Holstein-Primakoff Boson Theory for Antiferromagnetic Spin Polarons in Two-Dimensional Systems of Strongly Correlated Electrons [J] . Park K, Ahn SA, Salk SHS Journal of the Korean Physical Society . 2009,第1期

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机译：荷斯坦极化子在强电场中
5. Quantum phase transitions in two-dimensional electron systems under strong magnetic field. [D] . Liu, Dongzi. 1994

机译：二维电子系统在强磁场下的量子相变。
6. Absence of localization in disordered two-dimensional electron gas at weak magnetic field and strong spin-orbit coupling [O] . Ying Su, C. Wang, Y. Avishai, -1

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7. Orbital Effects of Strong Magnetic Field on a 2-D Holstein Polaron [O] . Pradhan, S., Chakraborty, Monodeep, Taraphder, A. 2015

机译：强磁场对二维荷斯坦极化子的轨道效应

Orbital effects of strong magnetic field on a two-dimensional Holstein polaron

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