Two-dimensional normal-state quantum oscillations in a superconducting heterostructure

Y. Kozuka, M. Kim, C. Bell, B. G. Kim, Y. Hikita and H. Y. Hwang ()
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Y. Kozuka: University of Tokyo, Kashiwa, Chiba 277-8561, Japan
M. Kim: University of Tokyo, Kashiwa, Chiba 277-8561, Japan
C. Bell: University of Tokyo, Kashiwa, Chiba 277-8561, Japan
B. G. Kim: University of Tokyo, Kashiwa, Chiba 277-8561, Japan
Y. Hikita: University of Tokyo, Kashiwa, Chiba 277-8561, Japan
H. Y. Hwang: University of Tokyo, Kashiwa, Chiba 277-8561, Japan

Nature, 2009, vol. 462, issue 7272, 487-490

Abstract: The dope on superconducting semiconductors Heavily doped semiconductors can exhibit superconductivity, but their performance is severely limited by extremely large electronic disorder. Similarly, the electron mean free path in low-dimensional superconducting thin films is usually limited by interface scattering or atomic-scale disorder. Kozuka et al. use niobium doping to fabricate a high-quality, two-dimensional superconducting layer within a thin-film heterostructure based on the first known superconducting semiconductor, SrTiO3. This should provide a model system in which to explore the quantum transport and interplay of both superconducting and normal electrons.

Date: 2009
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DOI: 10.1038/nature08566

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