Spatial imaging of two-dimensional electronic states in semiconductor quantum wells

Kyoichi Suzuki; K Kanisawa; Camille Janer; Simon Perraud; Kei Takashina; Toshimasa Fujisawa; Yoshiro Hirayama

doi:10.1103/PhysRevLett.98.136802

Spatial imaging of two-dimensional electronic states in semiconductor quantum wells

Kyoichi Suzuki, K Kanisawa, Camille Janer, Simon Perraud, Kei Takashina, Toshimasa Fujisawa, Yoshiro Hirayama

Department of Physics

Research output: Contribution to journal › Article › peer-review

36 Citations (SciVal)

Abstract

We measure the spatial distribution of the local density of states (LDOS) at cleaved surfaces of InAs/GaSb isolated quantum wells and double quantum wells (DQWs) by low-temperature scanning tunneling spectroscopy. Distinct standing wave patterns of LDOS corresponding to subbands are observed. These LDOS patterns and subband energies agree remarkably well with simple calculations with tip-induced band bending. Furthermore, for the DQWs, coupling of electronic states between the quantum wells is also clearly observed.

Original language	English
Article number	136802
Number of pages	4
Journal	Physical Review Letters
Volume	98
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.98.136802
Publication status	Published - 28 Mar 2007

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abstract = "We measure the spatial distribution of the local density of states (LDOS) at cleaved surfaces of InAs/GaSb isolated quantum wells and double quantum wells (DQWs) by low-temperature scanning tunneling spectroscopy. Distinct standing wave patterns of LDOS corresponding to subbands are observed. These LDOS patterns and subband energies agree remarkably well with simple calculations with tip-induced band bending. Furthermore, for the DQWs, coupling of electronic states between the quantum wells is also clearly observed.",

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AU - Suzuki, Kyoichi

AU - Kanisawa, K

AU - Janer, Camille

AU - Perraud, Simon

AU - Takashina, Kei

AU - Fujisawa, Toshimasa

AU - Hirayama, Yoshiro

PY - 2007/3/28

Y1 - 2007/3/28

N2 - We measure the spatial distribution of the local density of states (LDOS) at cleaved surfaces of InAs/GaSb isolated quantum wells and double quantum wells (DQWs) by low-temperature scanning tunneling spectroscopy. Distinct standing wave patterns of LDOS corresponding to subbands are observed. These LDOS patterns and subband energies agree remarkably well with simple calculations with tip-induced band bending. Furthermore, for the DQWs, coupling of electronic states between the quantum wells is also clearly observed.

AB - We measure the spatial distribution of the local density of states (LDOS) at cleaved surfaces of InAs/GaSb isolated quantum wells and double quantum wells (DQWs) by low-temperature scanning tunneling spectroscopy. Distinct standing wave patterns of LDOS corresponding to subbands are observed. These LDOS patterns and subband energies agree remarkably well with simple calculations with tip-induced band bending. Furthermore, for the DQWs, coupling of electronic states between the quantum wells is also clearly observed.

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DO - 10.1103/PhysRevLett.98.136802

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JO - Physical Review Letters

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Spatial imaging of two-dimensional electronic states in semiconductor quantum wells

Abstract

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