Excitonic Aharonov-Bohm effect in isotopically pure 70Ge/Si self-assembled type-II quantum dots

Satoru Miyamoto, Oussama Moutanabbir, Toyofumi Ishikawa, Mikio Eto, Eugene E. Haller, Kentarou Sawano, Yasuhiro Shiraki, Kohei M Itoh

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We report on a magnetophotoluminescence study of isotopically pure 70Ge/Si self-assembled type-II quantum dots. Oscillatory behaviors attributed to the Aharonov-Bohm effect are simultaneously observed for the emission energy and intensity of excitons subject to an increasing magnetic field. When the magnetic flux penetrates through the ringlike trajectory of an electron moving around each quantum dot, the ground state of an exciton experiences a change in its angular momentum. Our results provide the experimental evidence for the phase coherence of localized electron wave functions in group-IV Ge/Si self-assembled quantum structures.

Original languageEnglish
Article number073306
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number7
DOIs
Publication statusPublished - 2010 Aug 17

Fingerprint

Excitons
Semiconductor quantum dots
quantum dots
excitons
phase coherence
Electrons
Angular momentum
Magnetic flux
Wave functions
Ground state
magnetic flux
electrons
angular momentum
Trajectories
trajectories
wave functions
Magnetic fields
ground state
magnetic fields
LDS 751

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Excitonic Aharonov-Bohm effect in isotopically pure 70Ge/Si self-assembled type-II quantum dots. / Miyamoto, Satoru; Moutanabbir, Oussama; Ishikawa, Toyofumi; Eto, Mikio; Haller, Eugene E.; Sawano, Kentarou; Shiraki, Yasuhiro; Itoh, Kohei M.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 82, No. 7, 073306, 17.08.2010.

Research output: Contribution to journalArticle

Miyamoto, Satoru ; Moutanabbir, Oussama ; Ishikawa, Toyofumi ; Eto, Mikio ; Haller, Eugene E. ; Sawano, Kentarou ; Shiraki, Yasuhiro ; Itoh, Kohei M. / Excitonic Aharonov-Bohm effect in isotopically pure 70Ge/Si self-assembled type-II quantum dots. In: Physical Review B - Condensed Matter and Materials Physics. 2010 ; Vol. 82, No. 7.
@article{08c896309ecb408789b1614f91ae9980,
title = "Excitonic Aharonov-Bohm effect in isotopically pure 70Ge/Si self-assembled type-II quantum dots",
abstract = "We report on a magnetophotoluminescence study of isotopically pure 70Ge/Si self-assembled type-II quantum dots. Oscillatory behaviors attributed to the Aharonov-Bohm effect are simultaneously observed for the emission energy and intensity of excitons subject to an increasing magnetic field. When the magnetic flux penetrates through the ringlike trajectory of an electron moving around each quantum dot, the ground state of an exciton experiences a change in its angular momentum. Our results provide the experimental evidence for the phase coherence of localized electron wave functions in group-IV Ge/Si self-assembled quantum structures.",
author = "Satoru Miyamoto and Oussama Moutanabbir and Toyofumi Ishikawa and Mikio Eto and Haller, {Eugene E.} and Kentarou Sawano and Yasuhiro Shiraki and Itoh, {Kohei M}",
year = "2010",
month = "8",
day = "17",
doi = "10.1103/PhysRevB.82.073306",
language = "English",
volume = "82",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "7",

}

TY - JOUR

T1 - Excitonic Aharonov-Bohm effect in isotopically pure 70Ge/Si self-assembled type-II quantum dots

AU - Miyamoto, Satoru

AU - Moutanabbir, Oussama

AU - Ishikawa, Toyofumi

AU - Eto, Mikio

AU - Haller, Eugene E.

AU - Sawano, Kentarou

AU - Shiraki, Yasuhiro

AU - Itoh, Kohei M

PY - 2010/8/17

Y1 - 2010/8/17

N2 - We report on a magnetophotoluminescence study of isotopically pure 70Ge/Si self-assembled type-II quantum dots. Oscillatory behaviors attributed to the Aharonov-Bohm effect are simultaneously observed for the emission energy and intensity of excitons subject to an increasing magnetic field. When the magnetic flux penetrates through the ringlike trajectory of an electron moving around each quantum dot, the ground state of an exciton experiences a change in its angular momentum. Our results provide the experimental evidence for the phase coherence of localized electron wave functions in group-IV Ge/Si self-assembled quantum structures.

AB - We report on a magnetophotoluminescence study of isotopically pure 70Ge/Si self-assembled type-II quantum dots. Oscillatory behaviors attributed to the Aharonov-Bohm effect are simultaneously observed for the emission energy and intensity of excitons subject to an increasing magnetic field. When the magnetic flux penetrates through the ringlike trajectory of an electron moving around each quantum dot, the ground state of an exciton experiences a change in its angular momentum. Our results provide the experimental evidence for the phase coherence of localized electron wave functions in group-IV Ge/Si self-assembled quantum structures.

UR - http://www.scopus.com/inward/record.url?scp=77957585644&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957585644&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.82.073306

DO - 10.1103/PhysRevB.82.073306

M3 - Article

AN - SCOPUS:77957585644

VL - 82

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 7

M1 - 073306

ER -