Determining the local density of states in the constant current STM mode

Chris Hellenthal, Rene Heimbuch, Kai Sotthewes, Ernst S. Kooij, Henricus J.W. Zandvliet

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Abstract

We present an alternative scheme to determine the local density of states (LDOS) of a sample using data obtained via scanning tunneling spectroscopy (STS). Using either the tunneling current as a function of applied bias voltage or the tip-sample separation as a function of applied bias voltage, the LDOS can be determined via a numerical fitting algorithm. This fitting algorithm makes use of the one-dimensional Simmons tunnel barrier model without introducing any further mathematical approximations. By ways of a simulated LDOS, the proposed method is compared to existing LDOS extraction methods for both positive and negative biases, and the differences between the methods are discussed
Original languageEnglish
Article number035425
Pages (from-to)-
Number of pages6
JournalPhysical review B: Condensed matter and materials physics
Volume88
Issue number3
DOIs
Publication statusPublished - 2013

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Bias voltage
Tunnels
Spectroscopy
Scanning
electric potential
tunnels
scanning
approximation
spectroscopy

Keywords

  • METIS-298053
  • IR-89991

Cite this

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title = "Determining the local density of states in the constant current STM mode",
abstract = "We present an alternative scheme to determine the local density of states (LDOS) of a sample using data obtained via scanning tunneling spectroscopy (STS). Using either the tunneling current as a function of applied bias voltage or the tip-sample separation as a function of applied bias voltage, the LDOS can be determined via a numerical fitting algorithm. This fitting algorithm makes use of the one-dimensional Simmons tunnel barrier model without introducing any further mathematical approximations. By ways of a simulated LDOS, the proposed method is compared to existing LDOS extraction methods for both positive and negative biases, and the differences between the methods are discussed",
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Determining the local density of states in the constant current STM mode. / Hellenthal, Chris; Heimbuch, Rene; Sotthewes, Kai; Kooij, Ernst S.; Zandvliet, Henricus J.W.

In: Physical review B: Condensed matter and materials physics, Vol. 88, No. 3, 035425, 2013, p. -.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Determining the local density of states in the constant current STM mode

AU - Hellenthal, Chris

AU - Heimbuch, Rene

AU - Sotthewes, Kai

AU - Kooij, Ernst S.

AU - Zandvliet, Henricus J.W.

PY - 2013

Y1 - 2013

N2 - We present an alternative scheme to determine the local density of states (LDOS) of a sample using data obtained via scanning tunneling spectroscopy (STS). Using either the tunneling current as a function of applied bias voltage or the tip-sample separation as a function of applied bias voltage, the LDOS can be determined via a numerical fitting algorithm. This fitting algorithm makes use of the one-dimensional Simmons tunnel barrier model without introducing any further mathematical approximations. By ways of a simulated LDOS, the proposed method is compared to existing LDOS extraction methods for both positive and negative biases, and the differences between the methods are discussed

AB - We present an alternative scheme to determine the local density of states (LDOS) of a sample using data obtained via scanning tunneling spectroscopy (STS). Using either the tunneling current as a function of applied bias voltage or the tip-sample separation as a function of applied bias voltage, the LDOS can be determined via a numerical fitting algorithm. This fitting algorithm makes use of the one-dimensional Simmons tunnel barrier model without introducing any further mathematical approximations. By ways of a simulated LDOS, the proposed method is compared to existing LDOS extraction methods for both positive and negative biases, and the differences between the methods are discussed

KW - METIS-298053

KW - IR-89991

U2 - 10.1103/PhysRevB.88.035425

DO - 10.1103/PhysRevB.88.035425

M3 - Article

VL - 88

SP - -

JO - Physical review B: Condensed matter and materials physics

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