NaV2O5: An Exotic Exciton System

MV Mostovoy; DI Khomskii; J Knoester

doi:10.1142/9789812811387_0037

NaV2O5: An Exotic Exciton System

MV Mostovoy^*, DI Khomskii, J Knoester

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

We show that the phase transition which sodium vanadate undergoes at T-c = 34 K is driven by a charge ordering. The relevant effective Hamiltonian is of the Frenkel exciton type, with a very large bandwidth to molecular energy ratio. This causes strong non-Heitler-London effects and a temperature dependent gap that vanishes at T-c. In addition to the phase transition, the model qualitatively explains the observed absorption spectrum and the anomaly in the static dielectric constant. Within our model, the observed spin-gap opening at T-c results from exciton-spinon coupling.

Original language	English
Title of host publication	Proceedings Of The 2000 International Conference On Excitonic Processes In Condensed Matter
Editors	K Cho, A Matsui
Place of Publication	SINGAPORE
Publisher	World Scientific Publishing
Pages	164-168
Number of pages	5
Volume	86
Edition	20
ISBN (Print)	981-02-4588-2
DOIs	https://doi.org/10.1142/9789812811387_0037
Publication status	Published - 2001
Event	4th International Conference on Excitonic Processes in Condensed Matter (EXCON2000) - , Japan Duration: 22-Aug-2000 → 25-Aug-2000

Other

Other	4th International Conference on Excitonic Processes in Condensed Matter (EXCON2000)
Country/Territory	Japan
Period	22/08/2000 → 25/08/2000

Keywords

SPIN-PEIERLS COMPOUND
ALPHA'-NAV2O5
TEMPERATURE

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NaV2O5: An Excition System
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@inproceedings{2cc75327966c47538420b35c1af63745,

title = "NaV2O5: An Exotic Exciton System",

abstract = "We show that the phase transition which sodium vanadate undergoes at T-c = 34 K is driven by a charge ordering. The relevant effective Hamiltonian is of the Frenkel exciton type, with a very large bandwidth to molecular energy ratio. This causes strong non-Heitler-London effects and a temperature dependent gap that vanishes at T-c. In addition to the phase transition, the model qualitatively explains the observed absorption spectrum and the anomaly in the static dielectric constant. Within our model, the observed spin-gap opening at T-c results from exciton-spinon coupling.",

keywords = "SPIN-PEIERLS COMPOUND, ALPHA'-NAV2O5, TEMPERATURE",

author = "MV Mostovoy and DI Khomskii and J Knoester",

note = "Relation: http://www.rug.nl/natuurkunde/ date_submitted:2006 Rights: University of Groningen. Materials Science Centre; 4th International Conference on Excitonic Processes in Condensed Matter (EXCON2000) ; Conference date: 22-08-2000 Through 25-08-2000",

year = "2001",

doi = "10.1142/9789812811387_0037",

language = "English",

isbn = "981-02-4588-2",

volume = "86",

pages = "164--168",

editor = "K Cho and A Matsui",

booktitle = "Proceedings Of The 2000 International Conference On Excitonic Processes In Condensed Matter",

publisher = "World Scientific Publishing",

edition = "20",

}

Mostovoy, MV, Khomskii, DI & Knoester, J 2001, NaV2O5: An Exotic Exciton System. in K Cho & A Matsui (eds), Proceedings Of The 2000 International Conference On Excitonic Processes In Condensed Matter. 20 edn, vol. 86, World Scientific Publishing, SINGAPORE, pp. 164-168, 4th International Conference on Excitonic Processes in Condensed Matter (EXCON2000), Japan, 22/08/2000. https://doi.org/10.1142/9789812811387_0037

NaV2O5: An Exotic Exciton System. / Mostovoy, MV; Khomskii, DI; Knoester, J.
Proceedings Of The 2000 International Conference On Excitonic Processes In Condensed Matter. ed. / K Cho; A Matsui. Vol. 86 20. ed. SINGAPORE: World Scientific Publishing, 2001. p. 164-168.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - NaV2O5

T2 - 4th International Conference on Excitonic Processes in Condensed Matter (EXCON2000)

AU - Mostovoy, MV

AU - Khomskii, DI

AU - Knoester, J

N1 - Relation: http://www.rug.nl/natuurkunde/ date_submitted:2006 Rights: University of Groningen. Materials Science Centre

PY - 2001

Y1 - 2001

N2 - We show that the phase transition which sodium vanadate undergoes at T-c = 34 K is driven by a charge ordering. The relevant effective Hamiltonian is of the Frenkel exciton type, with a very large bandwidth to molecular energy ratio. This causes strong non-Heitler-London effects and a temperature dependent gap that vanishes at T-c. In addition to the phase transition, the model qualitatively explains the observed absorption spectrum and the anomaly in the static dielectric constant. Within our model, the observed spin-gap opening at T-c results from exciton-spinon coupling.

AB - We show that the phase transition which sodium vanadate undergoes at T-c = 34 K is driven by a charge ordering. The relevant effective Hamiltonian is of the Frenkel exciton type, with a very large bandwidth to molecular energy ratio. This causes strong non-Heitler-London effects and a temperature dependent gap that vanishes at T-c. In addition to the phase transition, the model qualitatively explains the observed absorption spectrum and the anomaly in the static dielectric constant. Within our model, the observed spin-gap opening at T-c results from exciton-spinon coupling.

KW - SPIN-PEIERLS COMPOUND

KW - ALPHA'-NAV2O5

KW - TEMPERATURE

U2 - 10.1142/9789812811387_0037

DO - 10.1142/9789812811387_0037

M3 - Conference contribution

SN - 981-02-4588-2

VL - 86

SP - 164

EP - 168

BT - Proceedings Of The 2000 International Conference On Excitonic Processes In Condensed Matter

A2 - Cho, K

A2 - Matsui, A

PB - World Scientific Publishing

CY - SINGAPORE

Y2 - 22 August 2000 through 25 August 2000

ER -

NaV2O5: An Exotic Exciton System

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