Observation of excitonic n-strings in a quasi-one-dimensional charge-transfer crystal

N. Peyghambarian, K. Meissner, B. Fluegel, S. Mazumdar, Fangyeong Guo, M. Kuwata-Gonokami, Y. Sato, K. Ema, R. Shimano, T. Tokihiro, H. Ezaki, E. Hanamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Collective excitations, such as plasmons, rotons, electron-hole liquid, and excitonic molecules, have been extensively studied in condensed matter. Wannier excitons in inorganic semiconductors are bound by the exchange interactions between two electrons of the exciton, and the bound state of more than two excitons is not possible. We demonstrate here a new type of collective excitations, bound states of multiple charge-transfer (CT) excitons. Coulomb interactions in one dimension are shown to bind a train of several (more than two) CT excitons. Experimental evidence for these new type of elementary excitations is reported in a quasi-one-dimensional CT crystal of anthracene PMDA. High density excitation by femtosecond light pulses generates multi-exciton chains, which we refer to as excitonic n-strings with n = 1, 2, 3, etc., along the stack axis of the crystal. Both the n = 2 excitonic string (biexciton) and the n = 3 string (tri-exciton) are observed. This report provides evidence for an n>2 exciton chain in this system. The stability of the n-string exciton is supported by our theoretical calculations based on the extended Hubbard Hamiltonian in one dimension.

Original languageEnglish
Title of host publicationElectrical, Optical, and Magnetic Properties of Organic Solid State Materials
EditorsAnthony F. Garito, Alex K-Y. Jen, Charles Y-C. Lee, Larry R. Dalton
PublisherPubl by Materials Research Society
Pages683-688
Number of pages6
ISBN (Print)1558992278
Publication statusPublished - 1994 Jan 1
EventProceedings of the MRS 1993 Fall Meeting - Boston, MA, USA
Duration: 1993 Nov 291993 Dec 3

Publication series

NameMaterials Research Society Symposium Proceedings
Volume328
ISSN (Print)0272-9172

Other

OtherProceedings of the MRS 1993 Fall Meeting
CityBoston, MA, USA
Period93-11-2993-12-03

Fingerprint

Excitons
Charge transfer
strings
charge transfer
excitons
Crystals
crystals
excitation
LDS 751
Hamiltonians
rotons
Plasmons
Electrons
Anthracene
Exchange interactions
elementary excitations
anthracene
Coulomb interactions
plasmons
interactions

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Peyghambarian, N., Meissner, K., Fluegel, B., Mazumdar, S., Guo, F., Kuwata-Gonokami, M., ... Hanamura, E. (1994). Observation of excitonic n-strings in a quasi-one-dimensional charge-transfer crystal. In A. F. Garito, A. K-Y. Jen, C. Y-C. Lee, & L. R. Dalton (Eds.), Electrical, Optical, and Magnetic Properties of Organic Solid State Materials (pp. 683-688). (Materials Research Society Symposium Proceedings; Vol. 328). Publ by Materials Research Society.
Peyghambarian, N. ; Meissner, K. ; Fluegel, B. ; Mazumdar, S. ; Guo, Fangyeong ; Kuwata-Gonokami, M. ; Sato, Y. ; Ema, K. ; Shimano, R. ; Tokihiro, T. ; Ezaki, H. ; Hanamura, E. / Observation of excitonic n-strings in a quasi-one-dimensional charge-transfer crystal. Electrical, Optical, and Magnetic Properties of Organic Solid State Materials. editor / Anthony F. Garito ; Alex K-Y. Jen ; Charles Y-C. Lee ; Larry R. Dalton. Publ by Materials Research Society, 1994. pp. 683-688 (Materials Research Society Symposium Proceedings).
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title = "Observation of excitonic n-strings in a quasi-one-dimensional charge-transfer crystal",
abstract = "Collective excitations, such as plasmons, rotons, electron-hole liquid, and excitonic molecules, have been extensively studied in condensed matter. Wannier excitons in inorganic semiconductors are bound by the exchange interactions between two electrons of the exciton, and the bound state of more than two excitons is not possible. We demonstrate here a new type of collective excitations, bound states of multiple charge-transfer (CT) excitons. Coulomb interactions in one dimension are shown to bind a train of several (more than two) CT excitons. Experimental evidence for these new type of elementary excitations is reported in a quasi-one-dimensional CT crystal of anthracene PMDA. High density excitation by femtosecond light pulses generates multi-exciton chains, which we refer to as excitonic n-strings with n = 1, 2, 3, etc., along the stack axis of the crystal. Both the n = 2 excitonic string (biexciton) and the n = 3 string (tri-exciton) are observed. This report provides evidence for an n>2 exciton chain in this system. The stability of the n-string exciton is supported by our theoretical calculations based on the extended Hubbard Hamiltonian in one dimension.",
author = "N. Peyghambarian and K. Meissner and B. Fluegel and S. Mazumdar and Fangyeong Guo and M. Kuwata-Gonokami and Y. Sato and K. Ema and R. Shimano and T. Tokihiro and H. Ezaki and E. Hanamura",
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Peyghambarian, N, Meissner, K, Fluegel, B, Mazumdar, S, Guo, F, Kuwata-Gonokami, M, Sato, Y, Ema, K, Shimano, R, Tokihiro, T, Ezaki, H & Hanamura, E 1994, Observation of excitonic n-strings in a quasi-one-dimensional charge-transfer crystal. in AF Garito, AK-Y Jen, CY-C Lee & LR Dalton (eds), Electrical, Optical, and Magnetic Properties of Organic Solid State Materials. Materials Research Society Symposium Proceedings, vol. 328, Publ by Materials Research Society, pp. 683-688, Proceedings of the MRS 1993 Fall Meeting, Boston, MA, USA, 93-11-29.

Observation of excitonic n-strings in a quasi-one-dimensional charge-transfer crystal. / Peyghambarian, N.; Meissner, K.; Fluegel, B.; Mazumdar, S.; Guo, Fangyeong; Kuwata-Gonokami, M.; Sato, Y.; Ema, K.; Shimano, R.; Tokihiro, T.; Ezaki, H.; Hanamura, E.

Electrical, Optical, and Magnetic Properties of Organic Solid State Materials. ed. / Anthony F. Garito; Alex K-Y. Jen; Charles Y-C. Lee; Larry R. Dalton. Publ by Materials Research Society, 1994. p. 683-688 (Materials Research Society Symposium Proceedings; Vol. 328).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Observation of excitonic n-strings in a quasi-one-dimensional charge-transfer crystal

AU - Peyghambarian, N.

AU - Meissner, K.

AU - Fluegel, B.

AU - Mazumdar, S.

AU - Guo, Fangyeong

AU - Kuwata-Gonokami, M.

AU - Sato, Y.

AU - Ema, K.

AU - Shimano, R.

AU - Tokihiro, T.

AU - Ezaki, H.

AU - Hanamura, E.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - Collective excitations, such as plasmons, rotons, electron-hole liquid, and excitonic molecules, have been extensively studied in condensed matter. Wannier excitons in inorganic semiconductors are bound by the exchange interactions between two electrons of the exciton, and the bound state of more than two excitons is not possible. We demonstrate here a new type of collective excitations, bound states of multiple charge-transfer (CT) excitons. Coulomb interactions in one dimension are shown to bind a train of several (more than two) CT excitons. Experimental evidence for these new type of elementary excitations is reported in a quasi-one-dimensional CT crystal of anthracene PMDA. High density excitation by femtosecond light pulses generates multi-exciton chains, which we refer to as excitonic n-strings with n = 1, 2, 3, etc., along the stack axis of the crystal. Both the n = 2 excitonic string (biexciton) and the n = 3 string (tri-exciton) are observed. This report provides evidence for an n>2 exciton chain in this system. The stability of the n-string exciton is supported by our theoretical calculations based on the extended Hubbard Hamiltonian in one dimension.

AB - Collective excitations, such as plasmons, rotons, electron-hole liquid, and excitonic molecules, have been extensively studied in condensed matter. Wannier excitons in inorganic semiconductors are bound by the exchange interactions between two electrons of the exciton, and the bound state of more than two excitons is not possible. We demonstrate here a new type of collective excitations, bound states of multiple charge-transfer (CT) excitons. Coulomb interactions in one dimension are shown to bind a train of several (more than two) CT excitons. Experimental evidence for these new type of elementary excitations is reported in a quasi-one-dimensional CT crystal of anthracene PMDA. High density excitation by femtosecond light pulses generates multi-exciton chains, which we refer to as excitonic n-strings with n = 1, 2, 3, etc., along the stack axis of the crystal. Both the n = 2 excitonic string (biexciton) and the n = 3 string (tri-exciton) are observed. This report provides evidence for an n>2 exciton chain in this system. The stability of the n-string exciton is supported by our theoretical calculations based on the extended Hubbard Hamiltonian in one dimension.

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M3 - Conference contribution

AN - SCOPUS:0028195606

SN - 1558992278

T3 - Materials Research Society Symposium Proceedings

SP - 683

EP - 688

BT - Electrical, Optical, and Magnetic Properties of Organic Solid State Materials

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A2 - Dalton, Larry R.

PB - Publ by Materials Research Society

ER -

Peyghambarian N, Meissner K, Fluegel B, Mazumdar S, Guo F, Kuwata-Gonokami M et al. Observation of excitonic n-strings in a quasi-one-dimensional charge-transfer crystal. In Garito AF, Jen AK-Y, Lee CY-C, Dalton LR, editors, Electrical, Optical, and Magnetic Properties of Organic Solid State Materials. Publ by Materials Research Society. 1994. p. 683-688. (Materials Research Society Symposium Proceedings).