Spin-dependent shot noise in diluted magnetic semiconductor/semiconductor heterostructures with a nonmagnetic barrier |
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| Institution: | 1. Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China;2. Collaborative Innovation Center of Quantum Matter, Beijing, China;1. Zarghan Branch, Islamic Azad University, Zarghan, Iran;2. Young Researchers and Elite Club, Zarghan Branch, Islamic Azad University, Zarghan, Iran;3. Department of Physics, College of Sciences, Shiraz University, Shiraz 71454, Iran;1. School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, Shandong, China;2. School of Physics and Electronic Engineering, Taishan University, Taian, Shandong 271021, China;1. Solid State Physics Department, National Research Center, Dokki, 12622 Cairo, Egypt;2. Department of Physics, Faculty of Science(Girls), Al-Azhar University, 11753, Nasr City, Cairo, Egypt;1. National Institute for Research and Development of Isotopic and Molecular Technologies, Donath Street, No. 65-103, RO-400293 Cluj-Napoca, Romania;2. Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR 72204, USA;3. Department of Physiology, University of Medicine and Pharmacy, Cluj-Napoca, Romania |
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| Abstract: | We investigate quantum size effect on the spin-dependent shot noise in the diluted magnetic semiconductor (DMS)/semiconductor heterostructure with a nonmagnetic semiconductor (NMS) barrier in the presence of external magnetic and electric fields. The results demonstrate that the NMS barrier plays a quite different role from the DMS layer in the electron transport process. It is found that spin-down shot noise shows relatively regular oscillations as the width of DMS layer increases, while the spin-up shot noise deceases monotonically. However, as the width of NMS layer increases, the spin-down shot noise displays irregular oscillations at first and then decreases while the spin-up shot noise decreases at a quite different rate. The results indicate that the shot noise can be used as a sensitive probe in detecting material type and its size. |
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| Keywords: | Spin Shot noise Diluted magnetic semiconductor Heterostructure |
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