skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Exploring the free energy surface using ab initio molecular dynamics

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4945653· OSTI ID:1262186
 [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Efficient exploration of the configuration space and identification of metastable structures are challenging from both computational as well as algorithmic perspectives. Here, we extend the recently proposed orderparameter aided temperature accelerated sampling schemes to efficiently and systematically explore free energy surfaces, and search for metastable states and reaction pathways within the framework of density functional theory based molecular dynamics. The sampling method is applied to explore the relevant parts of the configuration space in prototypical materials SiO2 and Ti to identify the different metastable structures corresponding to different phases in these materials. In addition, we use the string method in collective variables to study the melting pathways in the high pressure cotunnite phase of SiO2 and the hcp to fcc phase transition in Ti.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1262186
Alternate ID(s):
OSTI ID: 1249678
Report Number(s):
LLNL-JRNL-674389; JCPSA6
Journal Information:
Journal of Chemical Physics, Vol. 144, Issue 16; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

References (55)

Accurate determination of crystal structures based on averaged local bond order parameters journal September 2008
Crystal structure prediction from first principles journal December 2008
On energy estimators in path integral Monte Carlo simulations:  Dependence of accuracy on algorithm journal November 1989
Second-order integrators for Langevin equations with holonomic constraints journal September 2006
Nonlinear Ill-Posed Problems book January 1998
On the use of the adiabatic molecular dynamics technique in the calculation of free energy profiles journal March 2002
A general strategy for designing seamless multiscale methods journal August 2009
Ab initio random structure searching journal January 2011
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Thickness-dependent fcc–hcp phase transformation in polycrystalline titanium thin films journal April 2011
Crystal structure prediction via particle-swarm optimization journal September 2010
A genetic algorithm for predicting the structures of interfaces in multicomponent systems journal February 2010
Temperature-Accelerated Method for Exploring Polymorphism in Molecular Crystals Based on Free Energy journal June 2011
Global space-group optimization problem: Finding the stablest crystal structure without constraints journal March 2007
A temperature accelerated method for sampling free energy and determining reaction pathways in rare events simulations journal July 2006
Formation of face-centered-cubic titanium by mechanical attrition journal February 2003
A theoretical study of the stability of anionic defects in cubic ZrO2 at extreme conditions journal February 2016
Locating landmarks on high-dimensional free energy surfaces journal March 2015
Unified Approach for Molecular Dynamics and Density-Functional Theory journal November 1985
Optimization-Based String Method for Finding Minimum Energy Path journal August 2013
Formation of a crystal nucleus from liquid journal July 2010
Accurate sampling using Langevin dynamics journal May 2007
Shock compression of stishovite and melting of silica at planetary interior conditions journal January 2015
Order-parameter-aided temperature-accelerated sampling for the exploration of crystal polymorphism and solid-liquid phase transitions journal June 2014
Generalized Gaussian moment thermostatting: A new continuous dynamical approach to the canonical ensemble journal January 2000
Calculations of free energy barriers for local mechanisms of hydrogen diffusion in alanates book January 2008
Prediction of a hexagonal SiO2 phase affecting stabilities of MgSiO3 and CaSiO3 at multimegabar pressures journal January 2011
Self-Consistent Equations Including Exchange and Correlation Effects journal November 1965
Fluid like behavior of oxygen in cubic zirconia under extreme conditions journal October 2012
Temperature-accelerated dynamics for simulation of infrequent events journal June 2000
The quantum free energy barrier for hydrogen vacancy diffusion in Na3AlH6 journal January 2012
Nosé–Hoover chains: The canonical ensemble via continuous dynamics journal August 1992
Single-sweep methods for free energy calculations journal May 2008
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Microscopic mechanisms of equilibrium melting of a solid journal November 2014
Bond-orientational order in liquids and glasses journal July 1983
Replica Monte Carlo Simulation of Spin-Glasses journal November 1986
Early Stage of the Dehydrogenation of NaAlH 4 by Ab Initio Rare Event Simulations journal September 2012
Asymptotics for and against cross-validation journal January 1977
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
String method in collective variables: Minimum free energy paths and isocommittor surfaces journal July 2006
Finite Temperature String Method for the Study of Rare Events journal April 2005
Equilibrium and Rate Constants, and Reaction Mechanism of the HF Dissociation in the HF(H 2 O) 7 Cluster by ab Initio Rare Event Simulations journal December 2013
Quantum dynamics via adiabatic ab initio centroid molecular dynamics journal May 1999
Efficient and Direct Generation of Multidimensional Free Energy Surfaces via Adiabatic Dynamics without Coordinate Transformations journal December 2008
Assessing the efficiency of free energy calculation methods journal February 2004
Atomistic simulations of rare events using gentlest ascent dynamics journal March 2012
Thermal Properties of the Inhomogeneous Electron Gas journal March 1965
Positron lifetime studies of the hcp to fcc transformation induced by mechanical attrition of elemental titanium journal July 2004
Constant pressure molecular dynamics algorithms journal September 1994
Design of quasisymplectic propagators for Langevin dynamics journal July 2007
Optimization by Simulated Annealing journal May 1983
Crystal structure prediction using ab initio evolutionary techniques: Principles and applications journal June 2006
Sampling saddle points on a free energy surface journal April 2014
Density-Functional Theory of Atoms and Molecules book January 1995

Cited By (4)

Predicting phase behavior of grain boundaries with evolutionary search and machine learning text January 2017
Predicting phase behavior of grain boundaries with evolutionary search and machine learning journal February 2018
The thermodynamics of a liquid-solid interface at extreme conditions: A model close-packed system up to 100 GPa journal September 2018
Ab initio simulations of liquid electrolytes for energy conversion and storage journal October 2018