Next Article in Journal
New Analysis Method Application in Metallographic Images through the Construction of Mosaics Via Speeded Up Robust Features and Scale Invariant Feature Transform
Previous Article in Journal
A Bone Sample Containing a Bone Graft Substitute Analyzed by Correlating Density Information Obtained by X-ray Micro Tomography with Compositional Information Obtained by Raman Microscopy
Open AccessArticle

Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System

Department of Fundamental Courses, Academy of Armored Force Engineering, Beijing 100072, China
Department of Maths and Physics, Hunan Institute of Engineering, Xiangtan 411104, Hunan, China
Mechanical and electrical engineering college, Yanching Institute of Technology, Langfang 065201, Hebei, China
Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Author to whom correspondence should be addressed.
Academic Editor: Maryam Tabrizian
Materials 2015, 8(7), 3854-3863;
Received: 17 April 2015 / Revised: 25 May 2015 / Accepted: 15 June 2015 / Published: 25 June 2015
We study the heat generation in ferromagnet-quantum dot-ferromagnet system by the non-equilibrium Green’s functions method. Heat generation under the influence of ferromagnet leads is very different compared with a system with normal metal leads. The significant effects in heat generation are caused by the polarization angle θ associated with the orientation of polarized magnetic moment of electron in the ferromagnetic terminals. From the study of heat generation versus source drain bias (Q-eV) curves, we find that the heat generation decreases as θ increases from 0 to 0.7π. The heat generation versus gate voltage (Q-eVg) curves also display interesting behavior with increasing polarization angle θ. Meanwhile, heat generation is influenced by the relative angle θ of magnetic moment in the ferromagnetic leads. These results will provide theories to this quantum dot system as a new material of spintronics. View Full-Text
Keywords: heat generation; ferromagnet terminals; non-equilibrium Green’s functions; metamaterials heat generation; ferromagnet terminals; non-equilibrium Green’s functions; metamaterials
Show Figures

Graphical abstract

MDPI and ACS Style

Zhao, L.; Chen, Q.; Zhang, Y.; Zhao, L. Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System. Materials 2015, 8, 3854-3863.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

Only visits after 24 November 2015 are recorded.
Back to TopTop