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Title: Ferromagnetic transition in a one-dimensional spin-orbit-coupled metal and its mapping to a critical point in smectic liquid crystals

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1392172
Grant/Contract Number:
SC0010526
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 9; Related Information: CHORUS Timestamp: 2017-09-18 11:06:08; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Kozii, Vladyslav, Ruhman, Jonathan, Fu, Liang, and Radzihovsky, Leo. Ferromagnetic transition in a one-dimensional spin-orbit-coupled metal and its mapping to a critical point in smectic liquid crystals. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.094419.
Kozii, Vladyslav, Ruhman, Jonathan, Fu, Liang, & Radzihovsky, Leo. Ferromagnetic transition in a one-dimensional spin-orbit-coupled metal and its mapping to a critical point in smectic liquid crystals. United States. doi:10.1103/PhysRevB.96.094419.
Kozii, Vladyslav, Ruhman, Jonathan, Fu, Liang, and Radzihovsky, Leo. 2017. "Ferromagnetic transition in a one-dimensional spin-orbit-coupled metal and its mapping to a critical point in smectic liquid crystals". United States. doi:10.1103/PhysRevB.96.094419.
@article{osti_1392172,
title = {Ferromagnetic transition in a one-dimensional spin-orbit-coupled metal and its mapping to a critical point in smectic liquid crystals},
author = {Kozii, Vladyslav and Ruhman, Jonathan and Fu, Liang and Radzihovsky, Leo},
abstractNote = {},
doi = {10.1103/PhysRevB.96.094419},
journal = {Physical Review B},
number = 9,
volume = 96,
place = {United States},
year = 2017,
month = 9
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on September 18, 2018
Publisher's Accepted Manuscript

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  • We have investigated the smectic-C*{sub {alpha}}-smectic-C* (SmC*{sub {alpha}}-SmC*) transition in a series of binary mixtures with resonant x-ray diffraction, differential optical reflectivity, and heat capacity measurements. Results show that the phases are separated by a first-order transition that ends at a critical point. We report the observation of such a critical point. We have proposed the appropriate order parameter and obtained values of two critical exponents associated with this transition. The values of the critical exponents suggest that long-range intersections are present in the SmC*{sub {alpha}}-SmC* critical regions.
  • Experimentally high-resolution ac calorimetry measurments on a liquid-crystal compound exhibiting a smectic-A - smectic-C (SmA-SmC) phase transition which is shown to be mean-field-like is presented. In the light of this experimental result, a simple and convincing argument, based on the mean-field theory, is given to explain why non-mean-field critical exponents were obtained in many of the studies on the SmA-SmC transition. The theory not only gives an excellent fit to the data for temperatures below the transition temperature but also provides a qualitative prediction on the size of the deviation from the linear relationship between (T/sub c/-T) and the squaremore » of the order parameter. The predicted deviation is consistent with x-ray measurements on the order parameter of another liquid-crystal compound.« less
  • A detailed x-ray scattering and high-resolution ac calorimetric study has been carried out near the smectic-A to chiral smectic-C phase transition of liquid-crystal compounds 4-(2-methyl butyl) phenyl 4-n-octylbiphenyl-4-carboxylate (CE8) and p-(n-decyloxy) benzylidene-p-amino-(2-methylbutyl) cinnamate (DOBAMBC) confined in hydrophilic and hydrophobic aerosil nanoparticle networks. The character of the transition, which is mean field near a tricritical point in bulk, is changed dramatically with an increase of aerosil-induced disorder. X-ray measurements revealed pretransitional behavior and compression of the smectic layers, phenomena that are strongly pronounced in high aerosil concentrations. A theoretical model that takes into account the interplay of relevant mechanisms is proposedmore » to explain the observed phenomena. The effect of chirality on the interaction of liquid crystals with aerosils is discussed.« less
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  • We study interference and interactions in an InAs/InAsSb two-dimensional electron system. In such a system, spin-orbit interactions are shown to be strong, which result in weak antilocalization (WAL) and thereby positive magnetoresistance around zero magnetic field. After suppressing WAL by the magnetic field, we demonstrate that classical positive magnetoresistance due to spin-orbit coupling plays a role. With further increasing the magnetic field, the system undergoes a direct insulator-quantum Hall transition. By analyzing the magnetotransport behavior in different field regions, we show that both electron-electron interactions and spin-related effects are essential in understanding the observed direct transition.