^<139>La NQR Relaxation in a Superconductor La_3Ir_2Ge_2
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- Kishimoto Yutaka KISHIMOTO Yutaka
- Department of Physics, Faculty of Engineering, University of Tokushima
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- Kawasaki Yu KAWASAKI Yu
- Department of Physics, Faculty of Engineering, University of Tokushima
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- Ohno Takashi [他] OHNO Takashi
- Department of Physics, Faculty of Engineering, University of Tokushima
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- LI Dexin
- Institute for Materials Research, Tohoku University
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- HOMMA Yoshiya
- Institute for Materials Research, Tohoku University
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- SHIOKAWA Yoshinobu
- Institute for Materials Research, Tohoku University
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Author(s)
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- Kishimoto Yutaka KISHIMOTO Yutaka
- Department of Physics, Faculty of Engineering, University of Tokushima
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- Kawasaki Yu KAWASAKI Yu
- Department of Physics, Faculty of Engineering, University of Tokushima
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- Ohno Takashi [他] OHNO Takashi
- Department of Physics, Faculty of Engineering, University of Tokushima
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- LI Dexin
- Institute for Materials Research, Tohoku University
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- HOMMA Yoshiya
- Institute for Materials Research, Tohoku University
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- SHIOKAWA Yoshinobu
- Institute for Materials Research, Tohoku University
Abstract
To investigate the electronic state of La<SUB>3</SUB>Ir<SUB>2</SUB>Ge<SUB>2</SUB>, we have carried out <SUP>139</SUP>La-NQR measurement. In the normal state, the spin–lattice relaxation rate 1⁄<I>T</I><SUB>1</SUB> is proportional to the temperature <I>T</I>. 1⁄<I>T</I><SUB>1</SUB> shows a small coherence peak just below the superconducting transition temperature <I>T</I><SUB>c</SUB>=4.7 K and decreases exponentially well below <I>T</I><SUB>c</SUB>. La<SUB>3</SUB>Ir<SUB>2</SUB>Ge<SUB>2</SUB> is found to be a BCS superconductor with an energy gap 2Δ(0)=3.52<I>k</I><SUB>B</SUB><I>T</I><SUB>c</SUB>.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 73(12), 3389-3393, 2004-12-15
The Physical Society of Japan (JPS)
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