147 citations · 725 across the 15 of their papers we have counts for
7 papers · 1 filter
Renormalized phonons in nonlinear lattices: A variational approach
Junjie Liu, Sha Liu, Nianbei Li +2
We propose a variational approach to study renormalized phonons in momentum conserving nonlinear lattices with either symmetric or asymmetric potentials. To investigate the influen…
1D momentum-conserving systems: the conundrum of anomalous versus normal heat transport
Yunyun Li, Sha Liu, Nianbei Li +2
Transport and diffusion of heat in one dimensional (1D) nonlinear systems which {\it conserve momentum} is typically thought to proceed anomalously. Notable exceptions, however, ex…
Triggering waves in nonlinear lattices: Quest for anharmonic phonons and corresponding mean free paths
Sha Liu, Junjie Liu, Peter Hänggi +2
Guided by a stylized experiment we develop a self-consistent anharmonic phonon concept for nonlinear lattices which allows for explicit "visualization." The idea uses a small exter…
Anomalous Heat Diffusion
Sha Liu, Peter Hänggi, Nianbei Li +2
Consider anomalous energy spread in solid phases, i.e., , as induced by a small initial excess energy perturbation distribution $…
Anomalous Heat Conduction and Anomalous Diffusion in Low Dimensional Nanoscale Systems
Sha Liu, Xiangfan Xu, Rongguo Xie +2
Thermal transport is an important energy transfer process in nature. Phonon is the major energy carrier for heat in semiconductor and dielectric materials. In analogy to Ohm's law…
Geometric Heat Flux for Classical Thermal Transport in Interacting Open Systems
Jie Ren, Sha Liu, Baowen Li
We study classical heat conduction in a dissipative open system composed of interacting oscillators. By exactly solving a twisted Fokker-Planck equation which describes the full co…
Anomalous Heat Diffusion
Sha Liu, Peter Hänggi, Nianbei Li +2
Consider anomalous energy spread in solid phases, i.e., , as induced by a small initial excess energy perturbation di…