Changes of electronic structure across the insulator-to-metal transition of quasi-two-dimensional Na-intercalated β-HfNCl studied by photoemission and x-ray absorption

Physical Review B - Condensed Matter and Materials Physics

Volumn 64, Issue 15, 2001, Pages

  Yokoya, T ^a   Ishiwata, Y ^a   Shin, S ^a   Shamoto, S ^b   Iizawa, K ^b   Kajitani, T ^b   Hase, I ^c   Takahashi, T ^b  

^a UNIVERSITY OF TOKYO   (Japan)

^b TOHOKU UNIVERSITY   (Japan)

^c ELECTROTECHNICAL LABORATORY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

CHLORIDE; HAFNIUM; NITROGEN DERIVATIVE; ZIRCONIUM DERIVATIVE;

ABSORPTION SPECTROSCOPY; ARTICLE; CONDUCTANCE; CONDUCTOR; ELECTRONICS; ENERGY; PHOTOEMISSION SPECTROSCOPY; ROENTGEN SPECTROSCOPY; SPECTROSCOPY;

EID: 0011094727     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.64.153107     Document Type: Article

References (21)

1. S. Yamanaka, K. Hotehama, and H. Kawaji, Nature (London)392, 580 (1998).
2. S. Shamoto, K. Iizawa, M. Yamada, K. Ohoyama, Y. Yamaguchi, and T. Kajitani, J. Phys. Chem. Solids60, 1431 (1999).
3. S. Yamanaka, Annu. Rev. Mater. Sci.30, 53 (2000).
4. H. Kawaji, K. Hotehama, and S. Yamanaka, Chem. Mater.9, 2127 (1997), and references therein.
5. L F. Mattheiss, Phys. Rev. Lett.58, 1028 (1987);
6. K. Takegahara, H. Harima, and A. Yanase, Jpn. J. Appl. Phys., Part 226, L352 (1987).
7. I. Hase and Y. Nishizaki, Phys. Rev. B60, 1573 (1999).
8. R. Whet, A. Filippetti, and W E. Pickett, Europhys. Lett.48, 320 (1999).
9. S. Shamoto(unpublished).
10. S. Shamoto, K. Iizawa, Y. Asano, K. Ohoyama, and T. Kajitani, Mol. Cryst. Liq. Cryst. Sci. Technol., Sect. A341, 515 (2000).
11. I. Hase and Y. Nishihara, Physica B281&282, 788 (2000).
12. I. Hase(unpublished).
13. M. Ohashi, H. Nakano, S. Yamanaka, and M. Hattori, Solid State Ionics32/33, 97 (1989).
14. J J. Yeh and I. Lindau, At. Data Nucl. Data Tables32, 1 (1985).
15. A. Fujimori, I. Hase, M. Nakamura, H. Namatame, Y. Fujishima, Y. Tokura, M. Abbate, F M F. de Groot, M T. Czyzyk, J C. Fuggle, O. Strebel, F. Lopez, M. Domke, and G. Kaindl, Phys. Rev. B46, 9841 (1992).
16. Y. Aiura, H. Bardo, I. Hase, Y. Nishihara, Y. Haruyama, T. Shimizu, and H. Suzuki, J. Electron Spectrosc. Relat. Phenom.78, 199 (1996).
17. T. Higuchi, T. Tsukamoto, K. Kobayashi, Y. Ishiwata, M. Fujisawa, T. Yokoya, S. Yamaguchi and S. Shin, Phys. Rev. B61, 12 860 (2000).
18. For example, see R H. Friend and A D. Yoffe, Adv. Phys.36, 1 (1987).
19. One might think that the valence-band features do not show a substantial shift if most portion of the width (∼1 eV) is due to resolution broadening (∼0.4 eV), but the actual movement of (formula presented) into the conduction band can be much smaller than the width. However, if we assume a 0.1-eV shift of (formula presented) which is difficult to be detected from the present study, we should find an observed peak with its peak position nearly at (formula presented) owing to the Fermi function and the resolution. This is not consistent with the present PE spectrum, where the position of (formula presented) is nearly located at the mid point of the Fermi edge. This fact rules out the possibility related to the resolution broadening.
20. Note that the relative energy being zero in Figs. 22(a) and 22(b) does not mean the position of (formula presented) But it does correspond to the same photon energy for XA spectra of two compounds within an error of ±0.2 eV.
21. K. Maiti, Priya Mahadevan, and D D. Sarma, Phys. Rev. Lett.80, 2885 (1998).