High Pressure Optical Absorption in Cs 2 TCNQ 3 Complexes Grown Under the Influence of Magnetic Field |
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| Authors: | Hasanudin N Kuroda T Kagayama T Sugimoto I Mogi K Watanabe |
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| Institution: | 1. Department of Mechanical Engineering and Materials Science, Faculty of Engineering , Kumamoto University , Kurokami 2-39-1, Kumamoto , 860-0855 , Japan Phone: +81-96-342-3727 Fax: +81-96-342-3727 E-mail: hasan@msre.kumamotou.ac.jp;2. Department of Mechanical Engineering and Materials Science, Faculty of Engineering , Kumamoto University , Kurokami 2-39-1, Kumamoto , 860-0855 , Japan;3. CREST , Japan Science and Technology Corporation , Kawaguchi , 332-0012 , Japan;4. Department of Mechanical Engineering and Materials Science, Faculty of Engineering , Kumamoto University , Kurokami 2-39-1, Kumamoto , 860-0855 , Japan;5. Research Institute for Advanced Science and Technology , Osaka Prefecture University , Sakai , 599-8570 , Japan;6. CREST , Japan Science and Technology Corporation , Kawaguchi , 332-0012 , Japan;7. Institute for Materials Research , Tohoku University , Sendai , 980-8577 , Japan |
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| Abstract: | Crystals of the organic semiconductor Cs 2 TCNQ 3 have been grown under the influence of magnetic field of 5 T and their optical properties have been compared with the crystals grown without magnetic field. The magnetic field effect manifests itself as the enhancement of the intradimer charge transfer band S 1 , which appears at around 1.3 eV in the E//a polarization. The high-pressure optical absorption measurements have shown that the S 1 band of the crystal grown at 5 T contains a new component, which is significantly intensified with increasing pressure up to 1 GPa, but diminishes as pressure increases further up to 4 GPa, and remains constant at higher pressures. This new component is additional to the component of S 1 band which has similar properties to that of the crystals grown without magnetic filed, which continuously grows up to 3 GPa and abruptly broadens out at higher pressures. The new component of S 1 is strongly linked to the ferromagnetism in this substance. |
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| Keywords: | Organic Semiconductor Crystal Growth Under Magnetic Field High Pressure Optical Properties |
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