期刊
PHYSICAL REVIEW LETTERS
卷 93, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.93.016801
关键词
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A quasi-one-dimensional metallic Si(111)-(4x1)-In surface was investigated by a newly developed temperature-variable microscopic four-point probe method combined with in situ electron diffraction in ultrahigh vacuum. We have succeeded, for the first time, in detecting directly a surface metal-insulator transition around 130 K as a dramatic change of electrical conductivity through the surface states. An energy gap of similar to300 meV at the low-temperature phase, influences of defects and phase locking between the neighboring charge-density-wave chains were elucidated from the temperature dependence of conductivity.
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