Dispersion of quantum well states in Cu/Co/Cu(001)

Y. Z. Wu; C. Y. Won; E. Rotenberg; H. W. Zhao; F. Toyoma; N. V. Smith; Z. Q. Qiu

Dispersion of quantum well states in Cu/Co/Cu(001)

Y. Z. Wu, C. Y. Won, E. Rotenberg, H. W. Zhao, F. Toyoma, N. V. Smith, Z. Q. Qiu

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

27 Citations (Scopus)

Abstract

Quantum well states (QWS's) in Cu thin films grown on Co/Cu(001) were studied using angle-resolved photoemission spectroscopy. For the normal photoemission, QWS's from both lower and higher energy bands relative to the vacuum level were measured, and explained by phase accumulation method. QWS's from the lower band were studied in detail as a function of the in-plane momentum k_∥. We found that the QWS dispersion depends on the Cu film thickness. From the experimental data, we deduced the quantized perpendicular momentum k_⊥ and the energy as a function of k_∥. Our results show that the in-plane effective mass cannot be obtained by a simple parabolic fitting of the E vs k_∥ due to the dependence of k_⊥ on k_∥.

Original language	English
Article number	245418
Pages (from-to)	2454181-2454185
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	66
Issue number	24
Publication status	Published - 15 Dec 2002

Cite this

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title = "Dispersion of quantum well states in Cu/Co/Cu(001)",

abstract = "Quantum well states (QWS's) in Cu thin films grown on Co/Cu(001) were studied using angle-resolved photoemission spectroscopy. For the normal photoemission, QWS's from both lower and higher energy bands relative to the vacuum level were measured, and explained by phase accumulation method. QWS's from the lower band were studied in detail as a function of the in-plane momentum k∥. We found that the QWS dispersion depends on the Cu film thickness. From the experimental data, we deduced the quantized perpendicular momentum k⊥ and the energy as a function of k∥. Our results show that the in-plane effective mass cannot be obtained by a simple parabolic fitting of the E vs k∥ due to the dependence of k⊥ on k∥.",

author = "Wu, {Y. Z.} and Won, {C. Y.} and E. Rotenberg and Zhao, {H. W.} and F. Toyoma and Smith, {N. V.} and Qiu, {Z. Q.}",

year = "2002",

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language = "English",

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T1 - Dispersion of quantum well states in Cu/Co/Cu(001)

AU - Wu, Y. Z.

AU - Won, C. Y.

AU - Rotenberg, E.

AU - Zhao, H. W.

AU - Toyoma, F.

AU - Smith, N. V.

AU - Qiu, Z. Q.

PY - 2002/12/15

Y1 - 2002/12/15

N2 - Quantum well states (QWS's) in Cu thin films grown on Co/Cu(001) were studied using angle-resolved photoemission spectroscopy. For the normal photoemission, QWS's from both lower and higher energy bands relative to the vacuum level were measured, and explained by phase accumulation method. QWS's from the lower band were studied in detail as a function of the in-plane momentum k∥. We found that the QWS dispersion depends on the Cu film thickness. From the experimental data, we deduced the quantized perpendicular momentum k⊥ and the energy as a function of k∥. Our results show that the in-plane effective mass cannot be obtained by a simple parabolic fitting of the E vs k∥ due to the dependence of k⊥ on k∥.

AB - Quantum well states (QWS's) in Cu thin films grown on Co/Cu(001) were studied using angle-resolved photoemission spectroscopy. For the normal photoemission, QWS's from both lower and higher energy bands relative to the vacuum level were measured, and explained by phase accumulation method. QWS's from the lower band were studied in detail as a function of the in-plane momentum k∥. We found that the QWS dispersion depends on the Cu film thickness. From the experimental data, we deduced the quantized perpendicular momentum k⊥ and the energy as a function of k∥. Our results show that the in-plane effective mass cannot be obtained by a simple parabolic fitting of the E vs k∥ due to the dependence of k⊥ on k∥.

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AN - SCOPUS:0037116042

SN - 1098-0121

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 24

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Dispersion of quantum well states in Cu/Co/Cu(001)

Abstract

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