Observation of the exciton Mott transition in the photoluminescence of coupled quantum wells

Gabija Kirsanské; Petru Tighineanu; Raphaël Sura Daveau; Javier Miguel-Sánchez; Peter Lodahl; Søren Stobbe

doi:10.1103/PhysRevB.94.155438

Observation of the exciton Mott transition in the photoluminescence of coupled quantum wells

Gabija Kirsanské, Petru Tighineanu, Raphaël Sura Daveau, Javier Miguel-Sánchez, Peter Lodahl, Søren Stobbe

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Abstract

Indirect excitons in coupled quantum wells have long radiative lifetimes and form a cold quasi-two-dimensional population suitable for studying collective quantum effects. Here we report the observation of the exciton Mott transition from an insulating (excitons) to a conducting (ionized electron-hole pairs) phase, which occurs gradually as a function of carrier density and temperature. The transition is inferred from spectral and time-resolved photoluminescence measurements around a carrier density of 2×1010cm-2 and temperatures of 12-16 K. An externally applied electric field is employed to tune the dynamics of the transition via the quantum-confined Stark effect. Our results provide evidence of a gradual nature of the exciton Mott transition.

Originalsprog	Engelsk
Artikelnummer	155438
Tidsskrift	Physical Review B
Vol/bind	94
ISSN	2469-9950
DOI	https://doi.org/10.1103/PhysRevB.94.155438
Status	Udgivet - 21 okt. 2016

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10.1103/PhysRevB.94.155438

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title = "Observation of the exciton Mott transition in the photoluminescence of coupled quantum wells",

abstract = "Indirect excitons in coupled quantum wells have long radiative lifetimes and form a cold quasi-two-dimensional population suitable for studying collective quantum effects. Here we report the observation of the exciton Mott transition from an insulating (excitons) to a conducting (ionized electron-hole pairs) phase, which occurs gradually as a function of carrier density and temperature. The transition is inferred from spectral and time-resolved photoluminescence measurements around a carrier density of 2×1010cm-2 and temperatures of 12-16 K. An externally applied electric field is employed to tune the dynamics of the transition via the quantum-confined Stark effect. Our results provide evidence of a gradual nature of the exciton Mott transition.",

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T1 - Observation of the exciton Mott transition in the photoluminescence of coupled quantum wells

AU - Kirsanské, Gabija

AU - Tighineanu, Petru

AU - Daveau, Raphaël Sura

AU - Miguel-Sánchez, Javier

AU - Lodahl, Peter

AU - Stobbe, Søren

PY - 2016/10/21

Y1 - 2016/10/21

N2 - Indirect excitons in coupled quantum wells have long radiative lifetimes and form a cold quasi-two-dimensional population suitable for studying collective quantum effects. Here we report the observation of the exciton Mott transition from an insulating (excitons) to a conducting (ionized electron-hole pairs) phase, which occurs gradually as a function of carrier density and temperature. The transition is inferred from spectral and time-resolved photoluminescence measurements around a carrier density of 2×1010cm-2 and temperatures of 12-16 K. An externally applied electric field is employed to tune the dynamics of the transition via the quantum-confined Stark effect. Our results provide evidence of a gradual nature of the exciton Mott transition.

AB - Indirect excitons in coupled quantum wells have long radiative lifetimes and form a cold quasi-two-dimensional population suitable for studying collective quantum effects. Here we report the observation of the exciton Mott transition from an insulating (excitons) to a conducting (ionized electron-hole pairs) phase, which occurs gradually as a function of carrier density and temperature. The transition is inferred from spectral and time-resolved photoluminescence measurements around a carrier density of 2×1010cm-2 and temperatures of 12-16 K. An externally applied electric field is employed to tune the dynamics of the transition via the quantum-confined Stark effect. Our results provide evidence of a gradual nature of the exciton Mott transition.

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DO - 10.1103/PhysRevB.94.155438

M3 - Journal article

SN - 2469-9950

VL - 94

JO - Physical Review B

JF - Physical Review B

M1 - 155438

ER -

Observation of the exciton Mott transition in the photoluminescence of coupled quantum wells

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