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Artificial Haldane gap material on a semiconductor chip
Authors:Yun-Pil Shim  Anand Sharma  Chang-Yu Hsieh  Pawel Hawrylak
Affiliation:1. Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Canada K1A 0R6;2. Department of Physics, University of Ottawa, Ottawa, Canada K1N 6N5;1. Materials Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam;2. Department of Physics, Hue University’s College of Education, 34 Le Loi, Hue City, Viet Nam;3. Young Researchers and Elite Club, South Tehran Branch, Islamic Azad University, Tehran, Iran;4. Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran;1. Department of Physics, Sari Branch, Islamic Azad University, Sari, Iran;2. School of Physics, Damghan University, Damghan, Iran;1. Department of Physics, Razi University, Kermanshah, Iran;2. Nano Science and Nano Technology Research Center, Razi University, Kermanshah, Iran;3. Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Evin, Tehran 19835-63113, Iran;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;2. Tianjin Zhonghao Unitech Co., Ltd., Tianjin 300072, PR China
Abstract:We show how nanostructuring of a metallic gate of a field-effect transistor (FET) converts the electron channel of an FET to an artificial Haldane chain with a gap in the energy spectrum. A specially designed gate structure creates a chain of triple quantum dot molecules. The electrons localized in the molecules realize a spin-half Heisenberg chain with spin–spin interactions alternating between ferromagnetic and antiferromagnetic. The quantum state of an FET is a semiconductor implementation of an integer spin-one antiferromagnetic Heisenberg chain with a unique correlated ground state and a finite energy gap, originally conjectured by Haldane.
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