NMR study in the superconducting silicon clathrate compound NaxBaySi46
スポンサーリンク
概要
- 論文の詳細を見る
29Si, 23Na, 137Ba, and 135Ba NMR experiments were carried out in the superconducting silicon clathrate compound NaxBaySi46 to study the electronic states above the superconducting transition temperature. We observed three distinct 29Si signals with different Knight shift (2036, 862, and 720 ppm at 90 K with a small temperature dependence of ∼10%), which were ascribed to inequivalent Si sites in the Si46 structure. The results indicate that the conduction-electron spin and/or charge density is strongly site-dependent. At all the atomic sites, the Korringa relation in NMR relaxation was observed, indicative of metallic electronic structure with moderate electronic correlation. The Na and Ba atoms are partially ionized in NaxBaySi46, which shows the noticeable difference from the system of alkali-metal-doped fullerides. The comparison with band calculations is discussed.
- American Physical Societyの論文
- 1996-11-01
著者
関連論文
- Interplay between thermoelectric and structural properties of type-I clathrate K8Ga8Sn38 single crystals
- Synthesis and structures of samarium platinum germanides : SmPtGe2 and Sm2Pt3Ge5
- High-Pressure Synthesis and Structure of New Filled Skutterudite Compounds with Ge-substituted Host Network; LnRh4Sb9Ge3, Ln = La, Ce, Pr, and Nd
- Electronic structure and vibrational properties of Ba8Si46,Ba8AgnSi46-n, and Ba8AunSi46-n
- Two-dimensional nature of superconductivity in the intercalated layered systems LixHfNCl and LixZrNCl: Muon spin relaxation and magnetization measurements
- Superconductivity in doped s p3 semiconductors : The case of the clathrates
- High-pressure Raman study of the iodine-doped silicon clathrate I8Si44I2
- Bond switching from two- to three-dimensional polymers of C60 at high pressure
- High-pressure synthesis and superconductivity of LaGe5 containing a tunnel germanium network
- Superconducting characteristics in electron-doped layered hafnium nitride : 15N isotope effect studies
- Pressure stability and low compressibility of intercalated cagelike materials : The case of silicon clathrates
- Electronic structure and superconducting gap of silicon clathrate Ba8Si46 studied with ultrahigh-resolution photoemission spectroscopy
- Structural properties and thermodynamic stability of Ba-doped silicon type-I clathrates synthesized under high pressure
- Unconventional Superconductivity in Electron-Doped Layered Li0.48(THF)yHfNCl
- Origin of band-A emission in diamond thin films
- Evidence for quasi-two-dimensional superconductivity in electron-doped Li0.48(THF)yHfNCl
- Hydrogen in β-ZrNCl
- Raman scattering from vibrational modes in Si46 clathrates
- NMR study in the superconducting silicon clathrate compound NaxBaySi46
- Superconductivity in the silicon clathrate compound (Na,Ba)xSi46
- Synthesis and Properties of New Superconductors with Cage and Layered Structures