DOI: 10.1063/1.1995701. Soft x-ray spectroscopy of Ba24Ge100: Electronic phase transition and Ba-atom rattling

Soft x-ray spectroscopy of Ba24Ge100: Electronic phase transition and Ba-atom rattling

10.1063/1.1995701

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The electronic states of Ba24Ge100 are studied by soft x-ray photoelectron spectroscopy (XPS) at a high-energy photon factory. A large reduction in the density of states (DOS) at the Fermi level is clearly shown before and after the electronic phase transition at 200K. The changes in the spectrum widths and the fine structures of the core-level Ba 4d spectra give a very reasonable indication of the Ba-atom rattlings in the clathrate polyhedra. On-resonance experiments using the excitation from Ba 3d to 4f levels display that the wave functions of Ba 5d and 6s orbitals give only a small contribution to make a Fermi surface through the hybridization with the Ge20 cluster orbitals. Importantly, reliable values of the DOS at the Fermi level NEF are successfully deduced, using two data sets of DOS obtained from high-resolution XPS and the total magnetic susceptibilities by a superconducting quantum interference device, to be 0.149 and 0.0427stateseV−1(Geatom)−1 for a high-temperature and for a low-temperature phase.

Bibliography

Rachi, T., Kitajima, M., Kobayashi, K., Guo, F., Nakano, T., Ikemoto, Y., Kobayashi, K., & Tanigaki, K. (2005). Soft x-ray spectroscopy of Ba24Ge100: Electronic phase transition and Ba-atom rattling. The Journal of Chemical Physics, 123(7).

Authors 8

Takeshi Rachi (first)
Masaki Kitajima (additional)
Kensuke Kobayashi (additional)
FangZhun Guo (additional)
Takehito Nakano (additional)
Yuka Ikemoto (additional)
Keisuke Kobayashi (additional)
Katsumi Tanigaki (additional)

References 18 Referenced 18

10.1103/PhysRevB.65.134435 / Phys. Rev. B (2002)
10.1006/jssc.2000.8777 / J. Solid State Chem. (2000)
10.1103/PhysRevLett.87.247003 / Phys. Rev. Lett. (2001)
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{'key': '2023080123110908300_c5', 'first-page': '207', 'volume': '215', 'year': '2000', 'journal-title': 'Z. Kristallogr.'} / Z. Kristallogr. (2000)
10.1016/j.jssc.2004.11.011 / J. Solid State Chem. (2005)
10.1063/1.1287626 / Rev. Sci. Instrum. (2000)
10.1006/jssc.2000.8632 / J. Solid State Chem. (2000)
10.1103/PhysRevB.66.045115 / Phys. Rev. B (2002)
10.1103/PhysRevB.51.2628 / Phys. Rev. B (1995)
10.1103/PhysRevB.62.7138 / Phys. Rev. B (2000)
10.1103/PhysRevB.64.172504 / Phys. Rev. B (2001)
{'volume-title': 'Photoelectron Spectroscopy', 'year': '1995', 'key': '2023080123110908300_c13'} / Photoelectron Spectroscopy (1995)
{'volume-title': 'Handbook of X-ray Photoelectron Spectroscopy', 'year': '1995', 'author': 'Chastain', 'key': '2023080123110908300_c14'} / Handbook of X-ray Photoelectron Spectroscopy by Chastain (1995)
M. Kitajima, Master thesis, Osaka City University, 2003.
10.1146/annurev.matsci.15.1.1 / Annu. Rev. Mater. Sci. (1985)
{'key': '2023080123110908300_c17', 'first-page': '47', 'volume': '350', 'year': '1991', 'journal-title': 'Nature (London)'} / Nature (London) (1991)
10.1103/PhysRevB.60.13245 / Phys. Rev. B (1999)

Dates

Type	When
Created	20 years ago (Aug. 19, 2005, 6 p.m.)
Deposited	2 years, 1 month ago (Aug. 1, 2023, 7:11 p.m.)
Indexed	1 month ago (July 30, 2025, 6:46 a.m.)
Issued	20 years ago (Aug. 15, 2005)
Published	20 years ago (Aug. 15, 2005)
Published Online	20 years ago (Aug. 23, 2005)
Published Print	20 years ago (Aug. 15, 2005)

Funders 0

None

BibTeX

@article{Rachi_2005, title={Soft x-ray spectroscopy of Ba24Ge100: Electronic phase transition and Ba-atom rattling}, volume={123}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1995701}, DOI={10.1063/1.1995701}, number={7}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Rachi, Takeshi and Kitajima, Masaki and Kobayashi, Kensuke and Guo, FangZhun and Nakano, Takehito and Ikemoto, Yuka and Kobayashi, Keisuke and Tanigaki, Katsumi}, year={2005}, month=aug }

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