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@ -21,7 +21,7 @@ For example, cumulative thermal conductivity is defined by
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\kappa^\text{c}(\omega) =
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\int^\omega_0 \sum_\lambda
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\kappa_\lambda \delta(\omega_\lambda - \omega) d\omega
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\kappa_\lambda \delta(\omega_\lambda - \omega') d\omega'
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where :math:`\kappa_\lambda` of phono3py for single-mode RTA is given as
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@ -137,21 +137,30 @@ data becomes 3.
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``--mfp``
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^^^^^^^^^^
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Mean free path (MFP) is used instead of frequency for the x-axis. The
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MFP cumulative :math:`\kappa(l)^\text{c}` is given by
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Mean free path (MFP) is used instead of frequency for the x-axis. MFP
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is defined in the single-mode RTA by a vector
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.. math::
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\mathbf{l}_\lambda = \mathbf{v}_\lambda \tau_\lambda.
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The MFP cumulative :math:`\kappa^\text{c}(l)` is given by
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.. math::
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\kappa^\text{c}(l) =
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\int^l_0 \sum_\lambda
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\kappa_\lambda \delta(l_\lambda - l)
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\kappa_\lambda \delta(l_\lambda - l') dl'
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where :math:`\kappa_\lambda` of phono3py for single-mode RTA is given as
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where :math:`l_\lambda = |\mathbf{l}_\lambda|` and
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:math:`\kappa_\lambda` is the contribution to :math:`\kappa` from the
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phonon mode :math:`\lambda` in the single-mode RTA, which is defined
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as
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.. math::
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\kappa_\lambda = C_\lambda \mathbf{v}_\lambda \otimes
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\mathbf{v}_\lambda = C_\lambda \mathbf{v}_\lambda \otimes
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\mathbf{v}_\lambda \tau_\lambda = C_\lambda \mathbf{v}_\lambda \otimes
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\mathbf{l}_\lambda.
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The unit of MFP is Angstrom.
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@ -27,9 +27,9 @@ Documentation
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command-options
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output-files
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hdf5_howto
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auxiliary-tools
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workload-distribution
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cutoff-pair
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auxiliary-tools
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external-tools
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tips
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citation
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