Time-resolved mapping of lattice dynamics in real-and momentum-space is essential to better understand several ubiquitous phenomena such as heat transport,displacive phase transition,thermal conductivity,and many more...Time-resolved mapping of lattice dynamics in real-and momentum-space is essential to better understand several ubiquitous phenomena such as heat transport,displacive phase transition,thermal conductivity,and many more.In this regard,time-resolved diffraction and microscopy methods are employed to image the induced lattice dynamics within a pump–probe configuration.In this work,we demonstrate that inelastic scattering methods,with the aid of theoretical simulation,are competent to provide similar information as one could obtain from the time-resolved diffraction and imaging measurements.To illustrate the robustness of the proposed method,our simulated result of lattice dynamics in germanium is in excellent agreement with the time-resolved x-ray diffuse scattering measurement performed using x-ray free-electron laser.For a given inelastic scattering data in energy and momentum space,the proposed method is useful to image in-situ lattice dynamics under different environmental conditions of temperature,pressure,and magnetic field.Moreover,the technique will profoundly impact where time-resolved diffraction within the pump–probe setup is not feasible,for instance,in inelastic neutron scattering.展开更多
基金G.D.acknowledges fruitful discussion with Sucharita Giri.A.P.R acknowledges the financial support from IRCC-IITB.D.B.thanks the financial support from MHRD-STARS under project no.:STARS/APR2019/PS/345/FSBRNS-DAE under project no.:58/14/30/2019-BRNS/11117+1 种基金G D.acknowledges support from Science and Engineering Research Board(SERB)India(Project No.ECR/2017/001460)the Ramanujan fellowship(SB/S2/RJN-152/2015).
文摘Time-resolved mapping of lattice dynamics in real-and momentum-space is essential to better understand several ubiquitous phenomena such as heat transport,displacive phase transition,thermal conductivity,and many more.In this regard,time-resolved diffraction and microscopy methods are employed to image the induced lattice dynamics within a pump–probe configuration.In this work,we demonstrate that inelastic scattering methods,with the aid of theoretical simulation,are competent to provide similar information as one could obtain from the time-resolved diffraction and imaging measurements.To illustrate the robustness of the proposed method,our simulated result of lattice dynamics in germanium is in excellent agreement with the time-resolved x-ray diffuse scattering measurement performed using x-ray free-electron laser.For a given inelastic scattering data in energy and momentum space,the proposed method is useful to image in-situ lattice dynamics under different environmental conditions of temperature,pressure,and magnetic field.Moreover,the technique will profoundly impact where time-resolved diffraction within the pump–probe setup is not feasible,for instance,in inelastic neutron scattering.
