STM Study of a Thin GaAs Tip

Kazuhisa SUEOKA; Naoki HOSOYAMA; Agus SUBAGYO; Koichi MUKASA; Kazunobu HAYAKAWA

doi:10.1380/jsssj.19.522

STMによる光照射GaAs薄膜劈開探針の研究

末岡和久, 細山直樹, Agus SUBAGYO, 武笠幸一, 早川和延

著者情報

ジャーナルフリー

1998 年 19 巻 8 号 p. 522-526

DOI https://doi.org/10.1380/jsssj.19.522

詳細

発行日: 1998/09/10 受付日: 1998/02/23 J-STAGE公開日: 2009/08/07 受理日: 1998/06/26 早期公開日: - 改訂日: -
訂正情報
訂正日: 2009/08/07 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : A spin sensitive tip is needed to realize the spin-polarized STM, which can resolve the spin-polarization of surface density of states. GaAs and its related compound semiconductors are well known as spin-polarized electron sources and are also candidates for the spin probe. We made a GaAs thin film tip by cleavage. Since the GaAs film is thin enough, circular polarized light can illuminate through the tip and efficiently excite spin-polarized electrons near its apex. Because an atomically resolved Si(111) 7×7 surface was observed with the tip, the tip is mechanically stable. Optical responses of the tip were studied with Fe thin films grown on a MgO(001) surface. Using this magnetic thin film, we demonstrated that spin-dependent tunneling could be detected with the tip.
Right : A spin sensitive tip is needed to realize the spin-polarized STM, which can resolve the spin-polarization of surface density of states. GaAs and its related compound semiconductors are well known as spin-polarized electron sources and are also candidates for the spin probe. We made a GaAs thin film tip by cleavage. Since the GaAs film is thin enough, circular polarized light can illuminate through the tip and efficiently excite spin-polarized electrons near its apex. Because an atomically resolved Si(111) 7×7 surface was observed with the tip, the tip is mechanically stable. Optical responses of the tip were studied with Fe thin films grown on a MgO(001) surface. Using this magnetic thin film, we demonstrated that spin-dependent tunneling could be detected with the tip.

訂正日: 2009/08/07 訂正理由: - 訂正箇所: 引用文献情報訂正内容: Wrong : 1) R. Wiesendanger, H.-J. Guntherodt, G. Guntherodt, G.J. Gambino and R. Ruf: Phys. Rev. Lett. 65, 247 (1990).
2) I.V. Shvets, R. Wiesendanger, D. Burgeler, G. Tarrach and H.-J. Güntherodt: J. Appl. Phys. 71, 5489 (1992).
3) S.F. Alvarad and P.Renaud: Phys. Rev. Lett. 68, 1387 (1992).
4) K. Sueoka, K. Mukasa and K. Hayakawa: Jpn. J. Appl. Phys. 32, 2989 (1993).
5) M.W.J. Prins, R. Jansen and H. van Kempen: Phys. Rev. B 35, 8105 (1996).
6) M. Sakurai, Z. Wu, T. Nakayama and M. Aono: Surf. Sci. 386, 311 (1997).
7) F. Meier and B.P. Zakharchenya: “Optical Orientation, Vol. 8 of Modern Problems in Condensed Matter Sciences” (North-Holland, Amsterdam, 1984).
9) K. Yamaguchi and S. Tada: J. Electrochem. Soc. 143, 2616 (1996).
10) K. Yamaguchi, K. Okamoto and S. Yugo: J. Appl. Phys. 77, 6061 (1995).

Right : 1) R. Wiesendanger, H.-J. Guntherodt, G. Guntherodt, G.J. Gambino and R. Ruf: Phys. Rev. Lett. 65, 247 (1990).
2) I.V. Shvets, R. Wiesendanger, D. Burgeler, G. Tarrach and H.-J. Güntherodt: J. Appl. Phys. 71, 5489 (1992).
3) S.F. Alvarad and P.Renaud: Phys. Rev. Lett. 68, 1387 (1992).
4) K. Sueoka, K. Mukasa and K. Hayakawa: Jpn. J. Appl. Phys. 32, 2989 (1993).
5) M.W.J. Prins, R. Jansen and H. van Kempen: Phys. Rev. B 35, 8105 (1996).
6) M. Sakurai, Z. Wu, T. Nakayama and M. Aono: Surf. Sci. 386, 311 (1997).
7) F. Meier and B.P. Zakharchenya: “Optical Orientation, Vol. 8 of Modern Problems in Condensed Matter Sciences” (North-Holland, Amsterdam, 1984).
9) K. Yamaguchi and S. Tada: J. Electrochem. Soc. 143, 2616 (1996).
10) K. Yamaguchi, K. Okamoto and S. Yugo: J. Appl. Phys. 77, 6061 (1995).

抄録

A spin sensitive tip is needed to realize the spin-polarized STM, which can resolve the spin-polarization of surface density of states. GaAs and its related compound semiconductors are well known as spin-polarized electron sources and are also candidates for the spin probe. We made a GaAs thin film tip by cleavage. Since the GaAs film is thin enough, circular polarized light can illuminate through the tip and efficiently excite spin-polarized electrons near its apex. Because an atomically resolved Si(111) 7×7 surface was observed with the tip, the tip is mechanically stable. Optical responses of the tip were studied with Fe thin films grown on a MgO(001) surface. Using this magnetic thin film, we demonstrated that spin-dependent tunneling could be detected with the tip.

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