2024年9月2日 · Here we address this question for SmB 6, a prototypical MV system characterized by two nearly-degenerate Sm 2+ and Sm 3+ configurations. By combining angle-resolved photoemission spectroscopy...

2024年9月15日 · Pressure and temperature induced valence changes in the Kondo insulator SmB 6 have been investigated using x-ray absorption spectroscopy (XAS) along several isobaric cooling runs and one isothermal compression. The average valence of Sm at various pressure and temperature conditions is extracted from high quality XAS data by peak fitting ...

2017年5月11日 · The compound SmB 6 is the best established realization of a topological Kondo insulator, in which a topological insulator state is obtained through Kondo coherence. Recent studies have found evidence that the surface of SmB 6 hosts ferromagnetic domains, creating an intrinsic platform for unidirectional ballistic transport at the domain boundaries.

2018年5月1日 · We report the measurement of X-ray absorption spectroscopy (XAS) on the prototypical intermediate valence compound SmB 6 to investigate the pressure and temperature dependences of mean Sm valence.

2009年6月1日 · X-ray absorption spectra of a valence-fluctuated Kondo insulator SmB6 have been studied near the Sm L3-edge at temperatures below 300 K. The average valence of Sm ions in SmB6 was deduced as...

2024年9月2日 · Here we address this question for SmB 6, a prototypical MV system characterized by two nearly-degenerate Sm 2+ and Sm 3+ configurations. By combining angle-resolved photoemission spectroscopy (ARPES) and x-ray absorption spectroscopy (XAS), we track the evolution of the mean Sm valence, v Sm, in the Sm x La 1-x B 6 series.

2017年9月1日 · We report the results of the X-ray absorption spectroscopy (XAS) on the intermediate valence compound SmB6. The XAS measurements were performed near the nonmagnetic-magnetic phase boundary.

2024年6月6日 · Pressure and temperature induced valence changes in the Kondo insulator SmB have been investigated using x-ray absorption spectroscopy (XAS) along several isobaric cooling runs and one isothermal...

2024年9月2日 · 本研究通过结合角分辨光电子能谱（ARPES）和X射线吸收光谱（XAS），追踪了Sm x La 1-x B 6 系列中Sm平均价态v Sm 的演变。 研究发现，随着三价La离子替代Sm离子，价态波动线性下降，直至x = 0.2时几乎完全抑制，此时v Sm ~ 2。 令人惊讶的是，当进一步减少x时，v Sm 出现重新增加的趋势，接近稀释杂质极限下的v imp ~ 2.35。 这种行为不仅偏离了v Sm 在整个系列中的单调演变，也与x → 0时v Sm 收敛到整数值的预期不符。 ARPES和XAS的结果，以 …

2023年9月11日 · Here we address this question for SmB6, a prototypical MV system characterized by two nearly-degenerate Sm2+ and Sm3+ configurations. By combining angle-resolved photoemission spectroscopy (ARPES) and x-ray absorption spectroscopy (XAS), we track the evolution of the mean Sm valence, vSm, in the SmxLa1−xB6 series.