Smectic A-C-A liquid crystal reentrance: A photon transmission study

Haluk Özbek; Sevtap Yildiz; Önder Pekcan; A. Nihat Berker

doi:10.1080/01411590290020420

Smectic A-C-A liquid crystal reentrance: A photon transmission study

Haluk Özbek, Sevtap Yildiz, Önder Pekcan^*, A. Nihat Berker

^*Bu çalışma için yazışmadan sorumlu yazar

Fizik Mühendisliği Bölümü

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

10 Atıf (Scopus)

Özet

Ultraviolet/visible photon transmission measurements were applied to study liquid crystal phase transitions in the binary BOPDOB-BOPOOB mixture. A sequence exhibiting a new reentrant, namely isotropic-nematic-smectic A-C-A as temperature is lowered, is identified. For the smectic A-C transition, the critical exponent β is seen to cross over from the mean-field 0.501 ± 0.008 to the helium-like 0.336 ± 0.012 as the transition is approached. The reentrant C-A transition is first-order, signalling a tricritical point in the phase diagram.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	301-308
Sayfa sayısı	8
Dergi	Phase Transitions
Hacim	75
Basın numarası	3
DOI'lar	https://doi.org/10.1080/01411590290020420
Yayın durumu	Yayınlandı - 2002

Finansman

We thank Prof. A. Nesrullayev for supplying us with the liquid crystal samples. ANB thanks Prof. C.W. Garland for two decades of useful conversations. The Perkin Elmer Lambda 2 UV/VIS spectrometer was kindly donated by the Alexander von Humboldt Foundation. This work was supported by the Research Fund of Istanbul Technical University, Grant No. 1426 and 1538. ANB was supported by the US Department of Energy under Grant No. DE-FG02-92ER45473.

Finansörler	Finansör numarası
US Department of Energy	DE-FG02-92ER45473
Istanbul Teknik Üniversitesi	1426, 1538

Belgeye Erişim

10.1080/01411590290020420

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Smectic A-C-A liquid crystal reentrance: A photon transmission study",

abstract = "Ultraviolet/visible photon transmission measurements were applied to study liquid crystal phase transitions in the binary BOPDOB-BOPOOB mixture. A sequence exhibiting a new reentrant, namely isotropic-nematic-smectic A-C-A as temperature is lowered, is identified. For the smectic A-C transition, the critical exponent β is seen to cross over from the mean-field 0.501 ± 0.008 to the helium-like 0.336 ± 0.012 as the transition is approached. The reentrant C-A transition is first-order, signalling a tricritical point in the phase diagram.",

keywords = "Binary mixture, Critical exponent, Crossover, Photon transmission technique, Reentrant phase transitions, Smectic order",

author = "Haluk {\"O}zbek and Sevtap Yildiz and {\"O}nder Pekcan and {Nihat Berker}, A.",

year = "2002",

doi = "10.1080/01411590290020420",

language = "English",

volume = "75",

pages = "301--308",

journal = "Phase Transitions",

issn = "0141-1594",

publisher = "Taylor and Francis Ltd.",

number = "3",

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TY - JOUR

T1 - Smectic A-C-A liquid crystal reentrance

T2 - A photon transmission study

AU - Özbek, Haluk

AU - Yildiz, Sevtap

AU - Pekcan, Önder

AU - Nihat Berker, A.

PY - 2002

Y1 - 2002

N2 - Ultraviolet/visible photon transmission measurements were applied to study liquid crystal phase transitions in the binary BOPDOB-BOPOOB mixture. A sequence exhibiting a new reentrant, namely isotropic-nematic-smectic A-C-A as temperature is lowered, is identified. For the smectic A-C transition, the critical exponent β is seen to cross over from the mean-field 0.501 ± 0.008 to the helium-like 0.336 ± 0.012 as the transition is approached. The reentrant C-A transition is first-order, signalling a tricritical point in the phase diagram.

AB - Ultraviolet/visible photon transmission measurements were applied to study liquid crystal phase transitions in the binary BOPDOB-BOPOOB mixture. A sequence exhibiting a new reentrant, namely isotropic-nematic-smectic A-C-A as temperature is lowered, is identified. For the smectic A-C transition, the critical exponent β is seen to cross over from the mean-field 0.501 ± 0.008 to the helium-like 0.336 ± 0.012 as the transition is approached. The reentrant C-A transition is first-order, signalling a tricritical point in the phase diagram.

KW - Binary mixture

KW - Critical exponent

KW - Crossover

KW - Photon transmission technique

KW - Reentrant phase transitions

KW - Smectic order

UR - http://www.scopus.com/inward/record.url?scp=0011689531&partnerID=8YFLogxK

U2 - 10.1080/01411590290020420

DO - 10.1080/01411590290020420

M3 - Article

AN - SCOPUS:0011689531

SN - 0141-1594

VL - 75

SP - 301

EP - 308

JO - Phase Transitions

JF - Phase Transitions

IS - 3

ER -

Smectic A-C-A liquid crystal reentrance: A photon transmission study

Özet

Finansman

Belgeye Erişim

Diğer Dosyalar ve Linkler

Parmak izi

Alıntı Yap