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authorJaron Kent-Dobias <jaron@kent-dobias.com>2019-10-30 11:23:38 -0400
committerJaron Kent-Dobias <jaron@kent-dobias.com>2019-10-30 11:23:38 -0400
commit31172eb6d3e57a99ab0909a9908f9d37805b6611 (patch)
tree72fda5d0e1009864a825ce5e71b551d6fe9f7336
parent990a7f81138083a24fe2e4070c236a56c8345ba8 (diff)
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pretty new figures
-rw-r--r--fig-stiffnesses.gplot93
-rw-r--r--fig-stiffnesses.pdfbin70347 -> 83184 bytes
-rw-r--r--main.tex109
3 files changed, 137 insertions, 65 deletions
diff --git a/fig-stiffnesses.gplot b/fig-stiffnesses.gplot
index e132869..9fa686e 100644
--- a/fig-stiffnesses.gplot
+++ b/fig-stiffnesses.gplot
@@ -1,60 +1,85 @@
+# colors
cc1 = "#5e81b5"
cc2 = "#e19c24"
-cc3 = "#8fb032"
+cc3 = "#6fa012"
cc4 = "#eb6235"
-set terminal epslatex size 8.68cm, 8.2cm standalone
+Tc = 17.26
+
+a1 = 71.1212
+b1 = 0.0104105
+c1 = 0.00378087
+d1 = 6.2662
+
+C10(T) = a1 - b1 * T
+C1(T) = C10(T) / (1 + d1 / (1 + c1 * abs(T - Tc)) / C10(T))
+
+a2 = 144.345
+b2 = 0.019492
+c2 = 120.462
+
+C20(T) = a2 - b2 * T**2 / (c2 + T)
+
+set terminal epslatex size 8.68cm, 6.5cm standalone header \
+ '\usepackage{xcolor}\definecolor{mathc3}{HTML}{6fa012}\definecolor{mathc4}{HTML}{eb6235}'
set output "fig-stiffnesses.tex"
-set multiplot layout 3, 2 margins 0.13, 0.9, 0.1, 0.998 spacing 0.01, 0.01
+set multiplot layout 2, 2 margins 0.1, 0.88, 0.1, 0.99 spacing 0.01, 0.01
set nokey
-set xrange [0:315]
-set arrow 1 from 17.26,graph 0 to 17.26,graph 1 nohead lw 4 lc rgb cc2
-lam(T) = 71.1212 - 0.0104105 * T
-set format x ""
-set xtics 0, 100, 300 offset 0,0.5
set mxtics 2
-set ylabel '\tiny $C / \mathrm{GPa}$' offset 4.5
-set format y '\tiny $%.1f$'
+set mx2tics 2
+set mytics 2
+set my2tics 2
+set format y '\tiny $%1.f$'
set format y2 '\tiny $%.1f$'
+set format x '\tiny $%.0f$'
+#set format x2 '\tiny $%.0f$'
+set format x2 ''
+set arrow 1 from Tc,graph 0 to Tc,graph 1 nohead lw 5 lc rgb cc2
+unset xtics
+set x2tics 50, 50, 250 offset 0,-0.5 mirror
+#set x2label '\tiny $T / \mathrm K$' offset 0,-1.0
+set xrange [0:300]
+
+set ylabel '\scriptsize $C_{\mathrm{B_{2\mathrm g}}} / \mathrm{GPa}$' offset 3.5
set yrange [140:145]
set ytics 141,1,144 offset 0.5
-set title '\tiny (e) $C_{\mathrm{B_{2\mathrm g}}}$' offset -1,-6
plot "data/c66.dat" using 1:(100 * $2) with lines lw 3 lc rgb cc3, \
- 144.345 - 0.019492 * x**2 / (120.462 + x) dt 3 lw 4 lc rgb cc4
-
-set ylabel ''
+ C20(x) dt 3 lw 4 lc rgb cc4
+unset ylabel
+set y2label '\scriptsize $C_{\mathrm{B_{1\mathrm g}}} / \mathrm{GPa}$' offset -5 rotate by -90
set yrange [65.05:65.7]
set y2tics 62.1,0.1,65.6 offset -0.5 mirror
-set title '\tiny (c) $C_{\mathrm{B_{1\mathrm g}}}$' offset -1,-6
-plot "data/c11mc12.dat" using 1:(100 * $2) with lines lw 3 lc rgb cc3
+plot "data/c11mc12.dat" using 1:(100 * $2) with lines lw 3 lc rgb cc3, \
+ C1(x) dt 3 lw 4 lc rgb cc4
-set format x '\tiny $%.0f$'
-set ylabel '\tiny $C / \mathrm{GPa}$'
-set xlabel '\tiny $T / \mathrm K$' offset 0,1
-unset y2tics
-set yrange [65:71.5]
+unset x2label
+unset x2tics
+
+set xlabel '\scriptsize $T / \mathrm K$' offset 0,1.25
+set xtics 50, 50, 250 offset 0,0.5 mirror
+unset y2tics
set ytics 63,1,72
-set title '\tiny (c) $C_{\mathrm{B_{1\mathrm g}}}$' offset -1,-6
+unset y2label
+set ylabel '\scriptsize $\textcolor{mathc3}{C_{\mathrm{B_{1\mathrm g}}}},\textcolor{mathc4}{C_{\mathrm{B_{1\mathrm g}}}^0} / \mathrm{GPa}$' offset 3
+
+set yrange [64.5:71.5]
plot "data/c11mc12.dat" using 1:(100 * $2) with lines lw 3 lc rgb cc3, \
- lam(x) dt 3 lw 4 lc rgb cc4
+ C10(x) dt 3 lw 4 lc rgb cc4
set ylabel ''
-set y2label '\tiny $\log[(C^0 - C) / \mathrm{GPa}]$' offset -5 rotate by -90
-set xlabel '\tiny $\log(T / \mathrm K+D_\perp q_*^4/a)$' offset 0,1
-
-set yrange [1:1.85]
-set format x '\tiny $%0.1f$'
-set xrange [5.5:6.35]
-set y2tics 1,0.1,1.9 offset -0.7 mirror
-set xtics 5.6,0.2,6.4
-set title '\tiny (c) $C_{\mathrm{B_{1\mathrm g}}}$' offset -1,-6
-plot "data/c11mc12.dat" using (log($1 + 1 / 0.00378087)):(log(lam($1) - 100 * $2)) with lines lw 3 lc rgb cc3, \
- 7.3 - x
+set y2label '\scriptsize $[C^0(C^0/C - 1)]^{-1} \cdot \mathrm{GPa}$' offset -5.5 rotate by -90
+
+set format y2 '\tiny $%0.2f$'
+set format y '\tiny $%0.2f$'
+set yrange [0.12:0.345]
+set y2tics 0.15,0.05,0.39 offset -0.7 mirror
+plot "data/c11mc12.dat" using 1:(1 / (C10($1)*(C10($1) / (100 * $2) - 1))) with lines lw 3 lc rgb cc3, \
+ 1/(C10(x) * (C10(x) / C1(x) - 1)) dt 3 lw 4 lc rgb cc4
diff --git a/fig-stiffnesses.pdf b/fig-stiffnesses.pdf
index 5962c50..de256aa 100644
--- a/fig-stiffnesses.pdf
+++ b/fig-stiffnesses.pdf
Binary files differ
diff --git a/main.tex b/main.tex
index 84bb3f9..d79ef78 100644
--- a/main.tex
+++ b/main.tex
@@ -3,6 +3,41 @@
\usepackage[utf8]{inputenc}
\usepackage{amsmath,graphicx,upgreek,amssymb,xcolor}
\usepackage[colorlinks=true,urlcolor=purple,citecolor=purple,filecolor=purple,linkcolor=purple]{hyperref}
+\usepackage[english]{babel}
+
+\definecolor{mathc1}{html}{5e81b5}
+\definecolor{mathc2}{html}{e19c24}
+\definecolor{mathc3}{html}{8fb032}
+\definecolor{mathc4}{html}{eb6235}
+
+\makeatletter
+% A change to a babel macro -- Don't ask!
+\def\bbl@set@language#1{%
+ \edef\languagename{%
+ \ifnum\escapechar=\expandafter`\string#1\@empty
+ \else\string#1\@empty\fi}%
+ %%%% ADDITION
+ \@ifundefined{babel@language@alias@\languagename}{}{%
+ \edef\languagename{\@nameuse{babel@language@alias@\languagename}}%
+ }%
+ %%%% END ADDITION
+ \select@language{\languagename}%
+ \expandafter\ifx\csname date\languagename\endcsname\relax\else
+ \if@filesw
+ \protected@write\@auxout{}{\string\select@language{\languagename}}%
+ \bbl@for\bbl@tempa\BabelContentsFiles{%
+ \addtocontents{\bbl@tempa}{\xstring\select@language{\languagename}}}%
+ \bbl@usehooks{write}{}%
+ \fi
+ \fi}
+% The user interface
+\newcommand{\DeclareLanguageAlias}[2]{%
+ \global\@namedef{babel@language@alias@#1}{#2}%
+}
+\makeatother
+
+\DeclareLanguageAlias{en}{english}
+
\newcommand{\brad}[1]{{\color{red} #1}}
@@ -59,22 +94,41 @@
\date\today
\begin{abstract}
- We develop a phenomenological mean field theory of the hidden order phase in \urusi\ as a ``staggered nematic" order. Several experimental features are reproduced when the order parameter is a nematic of the $\Bog$ representation, staggered along the c-axis: the topology of the temperature--pressure phase diagram, the response of the elastic modulus $(c_{11}-c_{12})/2$ above the hidden-order transition at zero pressure, and orthorhombic symmetry breaking in the high-pressure antiferromagnetic phase. In this scenario, hidden order is characterized by broken rotational symmetry that is modulated along the $c$-axis, the primary order of the high-pressure phase is an unmodulated nematic state, and the triple point joining those two phases with the high-temperature paramagnetic phase is a Lifshitz point.
+ We develop a phenomenological mean field theory of the hidden order phase in
+ \urusi\ as a ``staggered nematic" order. Several experimental features are
+ reproduced when the order parameter is a nematic of the $\Bog$
+ representation, staggered along the c-axis: the topology of the
+ temperature--pressure phase diagram, the response of the elastic modulus
+ $(C_{11}-C_{12})/2$ above the hidden-order transition at zero pressure, and
+ orthorhombic symmetry breaking in the high-pressure antiferromagnetic phase.
+ In this scenario, hidden order is characterized by broken rotational symmetry
+ that is modulated along the $c$-axis, the primary order of the high-pressure
+ phase is an unmodulated nematic state, and the triple point joining those two
+ phases with the high-temperature paramagnetic phase is a Lifshitz point.
\end{abstract}
\maketitle
\emph{Introduction.}
-\urusi\ is a paradigmatic example of a material with an ordered state whose broken symmetry remains unknown. This state, known as \emph{hidden order} (\ho), sets the stage for unconventional superconductivity that emerges at even lower temperatures.
-At sufficiently large hydrostatic pressures, both superconductivity and \ho\ give way to local moment antiferromagnetism (\afm) \cite{hassinger_temperature-pressure_2008}.
-Despite over thirty years of effort, the symmetry of the \ho\ state remains
-unknown, and modern theories \cite{kambe_odd-parity_2018, haule_arrested_2009,
- kusunose_hidden_2011, kung_chirality_2015, cricchio_itinerant_2009,
- ohkawa_quadrupole_1999, santini_crystal_1994, kiss_group_2005,
- harima_why_2010, thalmeier_signatures_2011, tonegawa_cyclotron_2012,
-rau_hidden_2012, riggs_evidence_2015, hoshino_resolution_2013,
-ikeda_theory_1998, chandra_hastatic_2013, harrison_hidden_nodate,
-ikeda_emergent_2012} propose a variety of possibilities. Our work here seeks to unify two experimental observations: one, the $\Bog$ ``nematic" elastic susceptibility $(c_{11}-c_{12})/2$ softens anomalously from room temperature down to T$_{\mathrm{HO}}=17.5~$ K \brad{find old citations for this data}; and two, a $\Bog$ nematic distortion is observed by x-ray scattering under sufficient pressure to destroy the \ho\ state \cite{choi_pressure-induced_2018}.
+\urusi\ is a paradigmatic example of a material with an ordered state whose
+broken symmetry remains unknown. This state, known as \emph{hidden order}
+(\ho), sets the stage for unconventional superconductivity that emerges at even
+lower temperatures. At sufficiently large hydrostatic pressures, both
+superconductivity and \ho\ give way to local moment antiferromagnetism (\afm)
+\cite{hassinger_temperature-pressure_2008}. Despite over thirty years of
+effort, the symmetry of the \ho\ state remains unknown, and modern theories
+\cite{kambe_odd-parity_2018, haule_arrested_2009, kusunose_hidden_2011,
+ kung_chirality_2015, cricchio_itinerant_2009, ohkawa_quadrupole_1999,
+ santini_crystal_1994, kiss_group_2005, harima_why_2010,
+ thalmeier_signatures_2011, tonegawa_cyclotron_2012, rau_hidden_2012,
+ riggs_evidence_2015, hoshino_resolution_2013, ikeda_theory_1998,
+chandra_hastatic_2013, harrison_hidden_nodate, ikeda_emergent_2012} propose a
+variety of possibilities. Our work here seeks to unify two experimental
+observations: one, the $\Bog$ ``nematic" elastic susceptibility
+$(C_{11}-C_{12})/2$ softens anomalously from room temperature down to
+T$_{\mathrm{HO}}=17.5~$ K \brad{find old citations for this data}; and two, a
+$\Bog$ nematic distortion is observed by x-ray scattering under sufficient
+pressure to destroy the \ho\ state \cite{choi_pressure-induced_2018}.
Recent \emph{resonant ultrasound spectroscopy} (\rus) measurements examined the thermodynamic discontinuities in the elastic moduli at T$_{\mathrm{HO}}$ \cite{ghosh_single-component_nodate}. The observation of discontinues only in compressional, or $\Aog$, elastic moduli requires that the point-group representation of \ho\ is one-dimensional. This rules out a large number of order parameter candidates \brad{cite those ruled out} in a model-free way, but still leaves the microscopic nature of \ho~ undecided.
@@ -357,10 +411,19 @@ $|\Delta\tilde r|^\gamma$ for $\gamma=1$. \brad{I think this last sentence, whi
\centering
\includegraphics[width=\columnwidth]{fig-stiffnesses}
\caption{
- Resonant ultrasound spectroscopy measurements of the elastic moduli of
- \urusi\ as a function of temperature for the six independent components of
- strain. The vertical lines show the location of the \ho\ transition.
- \textbf{ONE FIGURE: Just B2g and B1g, vashni fit for one, our fit for the other, something else}
+ \Rus\ measurements of the elastic moduli of
+ \urusi\ as a function of temperature (green, solid) alongside fits to theory. The vertical yellow lines show the location of the \ho\ transition. (a) $\Btg$ modulus data and fit to standard form \cite{varshni_temperature_1970}. (b) $\Bog$ modulus data and fit
+ to \eqref{eq:elastic.susceptibility}. The fit gives
+ $C^0_\Bog\simeq\big[71-(0.010\,\K^{-1})T\big]\,\GPa$,
+ $b^2/D_\perp q_*^4\simeq6.2\,\GPa$, and $a/D_\perp
+ q_*^4\simeq0.0038\,\K^{-1}$. Addition of an additional parameter to fit the standard bare modulus \cite{varshni_temperature_1970} led to sloppy fits. (c) $\Bog$ modulus data and fit of \emph{bare}
+ $\Bog$ modulus. (d) $\Bog$ modulus data and fit transformed using
+ $[C^0_\Bog(C^0_\Bog/C_\Bog-1)]]^{-1}$, which is prediced from
+ \eqref{eq:susceptibility} and \eqref{eq:elastic.susceptibility} to be
+ linear. The failure of the Ginzburg--Landau prediction
+ below the transition is expected on the grounds that the \op\ is too large
+ for the free energy expansion to be valid by the time the Ginzburg
+ temperature is reached.
}
\label{fig:data}
\end{figure}
@@ -385,22 +448,6 @@ Figure \ref{fig:fit}. The data and theory appear quantitatively consistent in
the high temperature phase, suggesting that \ho\ can be described as a
$\Bog$-nematic phase that is modulated at finite $q$ along the $c-$axis.
-\begin{figure}[htpb]
- \includegraphics[width=\columnwidth]{fig-fit}
- \caption{
- Elastic modulus data for the $\Bog$ component of strain (solid) along with
- a fit of \eqref{eq:elastic.susceptibility} to the data above $T_c$
- (dashed). The fit gives
- $C^0_\Bog\simeq\big[71-(0.010\,\K^{-1})T\big]\,\GPa$,
- $b^2/D_\perp q_*^4\simeq6.2\,\GPa$, and $a/D_\perp
- q_*^4\simeq0.0038\,\K^{-1}$. The failure of the Ginzburg--Landau prediction
- below the transition is expected on the grounds that the \op\ is too large
- for the free energy expansion to be valid by the time the Ginzburg
- temperature is reached.
- }
- \label{fig:fit}
-\end{figure}
-
We have seen that the mean-field theory of a $\Bog$ \op\ recreates the topology
of the \ho\ phase diagram and the temperature dependence of the $\Bog$ elastic modulus at zero pressure. This theory has several other physical implications. First,
the association of a modulated $\Bog$ order with the \ho\ phase implies a