단결정 반금속 비스무스 단일 나노선의 Shubnikov-de Haas 진동

김정민; 함진희; 심우영; 이경일; 전계진; 정원용; 이우영; Jeongmin Kim; Jinhee Ham; Wooyoung Shim; Kyoung-il Lee; Kye Jin Jeon; Won Young Jeung; Wooyoung Lee

Korean Journal of Materials Research, Vol.18, No.2, 103-106, February, 2008

DOI10.3740/MRSK.2008.18.2.103 Export Citation

단결정 반금속 비스무스 단일 나노선의 Shubnikov-de Haas 진동

Shubnikov-de Haas Oscillations in an Individual Single-Crystalline Semimetal Bismuth Nanowire

김정민, 함진희, 심우영, 이경일, 전계진, 정원용¹, 이우영^†

연세대학교 신소재공학과
¹한국과학기술연구원

Jeongmin Kim, Jinhee Ham, Wooyoung Shim, Kyoung-il Lee, Kye Jin Jeon, Won Young Jeung¹, and Wooyoung Lee^†

Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea
¹Korea Institute of Science and Technology (KIST), P. O. Box 131, Seoul 136-791, Korea

E-mail:

The magneto-transport properties of an individual single crystalline Bi nanowire grown by a spontaneous growth method are reported. A four-terminal device based on an individual 400-nm-diameter nanowire was successfully fabricated using a plasma etching technique that removed an oxide layer that had formed on the surface of the nanowire. Large transverse ordinary magnetoresistance (1401%) and negative longitudinal ordinary magnetoresistance (.38%) were measured at 2 K. It was observed that the period of Shubnikov-de Haas oscillations in transverse geometry was 0.074 T.1, 0.16 T.1 and 0.77 T.1, which is in good agreement with those of bulk Bi. However, it was found that the period of SdH oscillation in longitudinal geometry is 0.24 T.1, which is larger than the value of 0.16 T.1 reported for bulk Bi. The deviation is attributable to the spatial confinement arising from scattering at the nanowire surface boundary.

Keywords:single-crystalline Bi nanowire;magnetoresistance (MR);shubnikov-de haas oscillations (SdH);spatial confinement effect;landau energy level

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[2] Zhang Z, Sun X, Dresselhaus MS, Ying JY, Heremans J, Phys. Rev. B, 61, 4850 (2000)

[3] Yang FY, Liu K, Hong KM, Reich DH, Searson PC, Chien CL, Science, 284(5418), 1335 (1999)

[4] Yang FY, Liu K, Hong K, Reich DH, Searson PC, Chien CL, Leprince-Wang Y, Yu-Zhang K, Han K, Phy. Rev. B, 61, 6631 (2000)

[5] Lin YM, Sun X, Dresselhaus MS, Phys. Rev. B, 62, 4610 (2000)

[6] Shim W, Kim D, Lee K, Jeon KJ, Lee W, Chang J, Han S, Jeung WY, Johnson M, J. Kor. Mag. Soc., 17, 166 (2007)

[7] Liu K, Chien CL, Searson PC, Zhang KY, Appl. Phys. Lett., 73, 1436 (1998)

[8] Liu K, Chien CL, Searson PC, Phys. Rev. B, 58, R14681 (1998)

[9] Ziman JM, Principles of the Theory of Solids (Cambridge University Press, New York, 1964). (1964)

[10] Dhillon JS, Shoenberg D, Philos. Trans. R. Soc. London., 248, 1 (1955)