Lan Cheng

Lan Cheng

Assistant Professor

Remsen 327
410-516-5611
lcheng24@jhu.edu
Curriculum Vitae
Group/Lab Website
Google Scholar Profile

Biography
Research
Publications

Lan Cheng is an assistant professor in theoretical and computational chemistry. His group carries out research on relativistic electron-structure theory and heavy-element chemistry.

Lan received his Ph.D. from Peking University (Professor Wenjian Liu). After graduation he worked as a postdoctoral fellow at Johannes-Gutenberg Universität Mainz (Professor Jürgen Gauss) and at the University of Texas at Austin (Professor John Stanton).

The Cheng group develops novel electronic-structure methods and applies them in chemical and spectroscopic studies. The ultimate goal in the area of electronic-structure theory is perhaps to have a set of quantum-chemical methods and computer programs that are generally applicable to the entire periodic table and to both ground and excited electronic states. Our present work focuses on the treatment of relativistic effects on molecular properties.

An accurate and efficient treatment of relativistic effects remains a challenging task for quantum-chemical calculations, while promising progress has occurred in the past a few decades leading to a hierarchy of relativistic quantum-mechanical approaches that systematically relates the non-relativistic world (Schrodinger equation) to the relativistic world (Dirac equation).

Our research group works on algorithms and computer programs for treating relativistic effects in computations of molecular energies and properties (electrical properties, magnetic properties, as well as spin-orbit-dependent parameters). Newly developed methods are applied to a variety of chemical and spectroscopic problems involving heavy elements (coinage metals, lanthanides, actinides, etc).

Cheng_research

Displaying the 20 most recent publications. View the Google Scholar Profile for complete publications list.

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L Cheng
SCALAR RELATIVISTIC EQUATION-OF-MOTION COUPLED CLUSTER CALCULATIONS OF CORE-IONIZED/EXCITED STATES
International Symposium on Molecular Spectroscopy, 2017

ML Weichman, L Cheng, JB Kim, JF Stanton, DM Neumark
Low-lying vibronic level structure of the ground state of the methoxy radical: Slow electron velocity-map imaging (SEVI) spectra and Köppel-Domcke-Cederbaum (KDC) vibronic Hamiltonian calculations
The Journal of Chemical Physics 146 (22), 224309, 2017

KB Ng, Y Zhou, D Gresh, W Cairncross, T Roussy, Y Shagam, L Cheng, ...
Lif Spectroscopy of ThF and the Preparation of ThF^{+} for the Jila eEDM Experiment
72nd International Symposium on Molecular Spectroscopy: June 19-23, 2017 at ..., 2017

L Cheng
Scalar Relativistic Equation-Of Coupled Cluster Calculations of Core-Ionized States
72nd International Symposium on Molecular Spectroscopy: June 19-23, 2017 at ..., 2017

L Cheng
Ab Initio Calculation of the Infrared Spectrum for XeF6 Molecule
72nd International Symposium on Molecular Spectroscopy: June 19-23, 2017 at ..., 2017

R Zhang, Y Yu, TC Steimle, L Cheng
The electric dipole moments in the ground states of gold oxide, AuO, and gold sulfide, AuS
The Journal of Chemical Physics 146 (6), 064307, 2017

L Cheng, J Gauss, B Ruscic, PB Armentrout, JF Stanton
Bond Dissociation Energies for Diatomic Molecules Containing 3d Transition Metals: Benchmark Scalar-Relativistic Coupled-Cluster Calculations for 20 Molecules
Journal of chemical theory and computation 13 (3), 1044-1056, 2017

L Cheng
Ab Initio Calculations of Spin-Orbit Coupling for Heavy-Metal Containing Radicals
71st International Symposium on Molecular Spectroscopy, 2016

T Ichino, L Cheng, JF Stanton
Equation-Of Coupled-Cluster Calculations of Photodetachment Cross Sections for Atomic Negative Ions across the Periodic Table
71st International Symposium on Molecular Spectroscopy, 2016

X Zhang, SP Sander, L Cheng, VS Thimmakondu, JF Stanton
Matrix-Isolated Infrared Absorption Spectrum of CH2IOO Radical
The Journal of Physical Chemistry A 120 (2), 260-265, 2016

JFS Xu Zhang, Stanley P. Sander, Lan Cheng, Venkatesan S. Thimmakondu
Matrix-isolated infrared absorption spectrum of CH2BrOO radical
Chemical Physics Letters, 131-134, 2016

R Zhang, TC Steimle, L Cheng, JF Stanton
The permanent electric dipole moment of gold chloride, AuCl
Molecular Physics 113 (15-16), 2073-2080, 2015

L Cheng
Benchmark calculations on the nuclear quadrupole-coupling parameters for open-shell molecules using non-relativistic and scalar-relativistic coupled-cluster methods
The Journal of chemical physics 143 (6), 064301, 2015

SH Southworth, R Wehlitz, A Picón, CS Lehmann, L Cheng, JF Stanton
Inner-shell photoionization and core-hole decay of Xe and XeF2
The Journal of chemical physics 142 (22), 224302, 2015

L Cheng, J Gauss, JF Stanton
Relativistic coupled-cluster calculations on XeF6: Delicate interplay between electron-correlation and basis-set effects
The Journal of chemical physics 142 (22), 224309, 2015

L Cheng, J Gauss
Perturbative treatment of spin-orbit coupling within spin-free exact two-component theory
The Journal of chemical physics 141 (16), 164107, 2014

L Cheng, S Stopkowicz, J Gauss
Analytic energy derivatives in relativistic quantum chemistry
International Journal of Quantum Chemistry 114 (17), 1108-1127, 2014

L Cheng, S Stopkowicz, J Gauss
Spin-free Dirac-Coulomb calculations augmented with a perturbative treatment of spin-orbit effects at the Hartree-Fock level
The Journal of chemical physics 139 (21), 214114, 2013

MC McCarthy, L Cheng, KN Crabtree, O Martinez Jr, TL Nguyen, ...
The Simplest Criegee Intermediate (H2C O–O): Isotopic Spectroscopy, Equilibrium Structure, and Possible Formation from Atmospheric Lightning
The Journal of Physical Chemistry Letters 4 (23), 4133-4139, 2013

F Wang, TC Steimle, AG Adam, L Cheng, JF Stanton
The pure rotational spectrum of ruthenium monocarbide, RuC, and relativistic ab initio predictions
The Journal of chemical physics 139 (17), 174318, 2013