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Courses
- CMPCondensed Matter Physics
- IOTIntroductory Optics and Thermodynamics
- HIOTHonors Introductory Optics and Thermodynamics
- SSPSolid-State Physics
- TCMTheory of Condensed Matter
- HIRQPHonors Introductory Relativity and Quantum Physics
Grants
- Distinct Photophysics of the Spin-Entangled Triplet-Triplet Versus Free Triplets in Organic Semiconductors
Principal Investigator (PI)
2018
$450.0K
Active - Electron correlation effects on excited state behavior of carbon-based semiconductors
Principal Investigator (PI)
2012
$480.0K
- Photophysics of Conjugated Polymer Thin Films and Semiconducting Single-Walled Carbon Nanotubes
Principal Investigator (PI)
2007
$342.1K
- Theory of Coexisting Density Waves in Low Dimensional Quarter-Filled Band Molecular Solids
Principal Investigator (PI)
2006
$712.7K
News
- UA Annual Teaching Award Winners Announced
2007
- Three UA Physicists Elected as 2002 American Physical Society Fellows
2002
Publications (166)
Recent
- Free Triplets Versus Bound Triplet-Triplet Biexciton in Intramolecular Singlet Fission Materials: Structure-Property Correlations
2020
- Wave Function Based Analysis of Dynamics versus Yield of Free Triplets in Intramolecular Singlet Fission
2020
- Sr$_2$RuO$_4$, like doped cuprates and barium bismuthate, is a negative charge-transfer gap even parity superconductor with $\frac{3}{4}$-filled oxygen band
2020
- Theory of triangular lattice quasi-one-dimensional charge-transfer solids
2019
- From charge- and spin-ordering to superconductivity in the organic charge-transfer solids R. T. Clay, S. Mazumdar
2019
- Valence transition model of the pseudogap, charge order, and superconductivity in electron-doped and hole-doped copper oxidesed
2018
- Optical probes of the quantum-entangled triplet-triplet state in a heteroacene dimer
2018
- Diagrammatic Exciton Basis Theory of the Photophysics of Pentacene Dimers
2017
- Transient Magnetophotoinduced Absorption Studies of Photoexcitations in pi-Conjugated Donor-Acceptor Copolymers
2017
- Theory of Transient Excited State Absorptions in Pentacene and Derivatives: Triplet-Triplet Biexciton versus Free Triplets
2017
- Bond patterns and charge order amplitude in 1/4-filled charge-transfer solids
2017
- Coulomb-enhanced superconducting pair correlations and paired-electron liquid in the frustrated quarter-filled band
2016
- Coulomb enhancement of superconducting pair-pair correlations in a 3/4-filled model for kappa-(BEDT-TTF)(2)X
2016
- Theory of Primary Photoexcitations in Donor-Acceptor Copolymers
2015
- Theory of Singlet Fission in Polyenes, Acene Crystals, and Covalently Linked Acene Dimers
2015
- Electron correlations and two-photon states in polycyclic aromatic hydrocarbon molecules: A peculiar role of geometry
2014
- Theory of metal-intercalated phenacenes: Why molecular valence 3 is special
2014
- Comment on Tuning the Magnetic Dimensionality by Charge Ordering in the Molecular TMTTF Salts
2014
- The Chemical Physics of Unconventional Superconductivity
2014
- Subgap two-photon states in polycyclic aromatic hydrocarbons: Evidence for strong electron correlations
2014
- Does singlet fission enhance the performance of organic solar cells?
2013
- Absence of superconductivity and valence bond order in the Hubbard-Heisenberg model for organic charge-transfer solids
2013
- Absence of long-range superconducting correlations in the frustrated half-filled-band Hubbard model
2012
- Beyond the quantum spin liquid concept in frustrated two dimensional organic superconductors
2012
- Triplet excitations in carbon nanostructures
2012
- Similarities in electronic properties of organic charge-transfer solids and layered cobaltates
2012
- Ground state and finite temperature behavior of 1/4-filled band zigzag ladders
2012
- Paired electron crystal: Order from frustration in the quarter-filled band
2011
- Evidence for excimer photoexcitations in an ordered π-conjugated polymer film
2011
- Theory of carrier concentration-dependent electronic behavior in layered cobaltates
2011
- Bipolaron density-wave driven by antiferromagnetic correlations and frustration in organic superconductors
2010
- Cooperative orbital ordering and Peierls instability in the checkerboard lattice with doubly degenerate orbitals
2010
- Theory of interfacial charge-transfer complex photophysics in π -conjugated polymer-fullerene blends
2010
- The paired-electron crystal in the two-dimensional frustrated quarter-filled band
2010
- From valence bond solid to unconventional superconductivity in the organic charge-transfer solids
2009
- Electron-electron interaction effects on the photophysics of metallic single-walled carbon nanotubes
2009
- Local singlets, frustration, and unconventional superconductivity in the organic charge-transfer solids
2009
- Photophysics of charge-transfer excitons in thin films of π -conjugated polymers
2008
- Quantum critical transition from charge-ordered to superconducting state in the negative- U extended Hubbard model on a triangular lattice
2008
- Infrared investigation of the charge ordering pattern in the organic spin ladder candidate (DTTTF) sub 2 /sub Cu(mnt) sub 2 /sub
2008
- Absence of superconductivity in the half-filled band hubbard model on the anisotropic triangular lattice
2008
- The quantum interference effect transistor
2007
- π -electron theory of transverse optical excitons in semiconducting single-walled carbon nanotubes
2007
- Elucidation of the electronic structure of semiconducting single-walled carbon nanotubes by electroabsorption spectroscopy
2007
- Pinned low-energy electronic excitation in metal-exchanged vanadium oxide nanoscrolls
2007
- Temperature-driven transition from the Wigner crystal to the bond-charge-density wave in the quasi-one-dimensional quarter-filled band
2007
- Charge ordering and spin gap transitions in quarter-filled ladders
2006
- Photophysics of excitons in quasi-one-dimensional organic semiconductors: Single-walled carbon nanotubes and π -conjugated polymers
2006
- Quantitative calculations of the excitonic energy spectra of semiconducting single-walled carbon nanotubes within a π -electron model
2006
- Dimerization-induced enhancement of the spin gap in the quarter-filled two-leg rectangular ladder
2006
- Controlling quantum transport through a single molecule
2006
- Excitons in semiconducting single-walled carbon nanotubes
2005
- Density matrix renormalization group study of conjugated polymers with transverse π-conjugation
2005
- Role of electron-electron interactions on spin effects in electron-hole recombination in organic light emitting diodes
2005
- Cooperative density wave and giant spin gap in the quarter-filled zigzag electron ladder
2005
- Magnetism in BEDT-TTF materials
2005
- Charge ordering and local-singlet formation in quarter-filled band charge-transfer solids and oxides of early transition metals
2005
- Electron-electron interaction effects on the optical excitations of semiconducting single-walled carbon nanotubes
2004
- Ultrafast excited state absorption and charge separation in phenylene-based conjugated polymers
2004
- Charge order in quasi-one-dimensional organic charge-transfer solids
2003
- Designing π-conjugated polymers with light emission in the infrared
2003
- Electron correlation effects in electron-hole recombination in organic light-emitting diodes
2003
- The ubiquitous 1100 charge ordering in organic charge-transfer solids
2003
- Sub-Poissonian shot noise in molecular wires
2003
- Theory of excited-state absorption in phenylene-based π-conjugated polymers
2003
- Pattern of charge ordering in quasi-one-dimensional organic charge-transfer solids
2003
- Infrared light emission from π-conjugated polymers: A diagrammatic exciton basis valence bond theory
2003
- Electron correlation effects in electron-hole recombination and triplet-triplet scattering in organic light emitting diodes
2003
- Dimensionality dependence of optical nonlinearity and relaxation dynamics in cuprates
2002
- Charge Ordering in θ-(BEDT-TTF) sub 2 /sub X Materials
2002
- Comment on origin of giant optical nonlinearity in charge-transfer-mott insulators: A new paradigm for nonlinear optics [1] (multiple letters)
2002
- Formation cross-sections of singlet and triplet excitons in π-conjugated polymers
2001
- Interband two-photon transition in Mott insulator as a new mechanism for ultrafast optical nonlinearity
2001
- Electron correlation and photo physics of phenyl substituted polyacetylenes
2001
- The nature of the insulating state in organic superconductors
2001
- One-dimensional cuprate as a nonlinear optical material for ultrafast all-optical switching
2001
- Photophysics of phenyl-substituted polyacetylenes, theory
2001
- Low-dimensional perovskite copper oxide as a nonlinear optical material for all-optical switching
2001
- Erratum: Formation cross-sections of singlet and triplet excitons in π-conjugated polymers (Nature (2001) 409 (494-497))
2001
- Ultrafast optical nonlinearity in the quasi-one-dimensional Mott insulator Sr sub 2 /sub CuO sub 3 /sub
2000
- Bond-order and charge-density waves in the isotropic interacting two-dimensional quarter-filled band and the insulating state proximate to organic superconductivity
2000
- Prospects for the polymer nanoengineer
2000
- Giant and ultrafast optical nonlinearity in low dimensional perovskite copper oxides
2000
- Electron-correlation-induced transverse delocalization and longitudinal confinement in excited states of phenyl-substituted polyacetylenes
2000
- Theory of coexisting charge and spin-density waves in (TMTTF) sub 2 /sub Br, (TMTSF) sub 2 /sub PF sub 6 /sub and α-(BEDT-TTF) sub 2 /sub MHg(SCN) sub 4 /sub
1999
- Comment on Wigner crystal type of charge ordering in an organic conductor with a quarter-filled band: (DI-DCNQI) sub 2 /sub Ag
1999
- Diagrammatic exciton-basis valence-bond theory of linear polyenes
1999
- Theory of even-parity states in polyphenylenes
1999
- Designing Emissive Conjugated Polymers with Small Optical Gaps: A Step Towards Organic Polymeric Infrared Lasers
1999
- Optical absorption in the substituted phenylene-based conjugated polymers: Theory and experiment
1997
- What do nonlinear optical spectroscopy and picosecond photinduced absorption have to say about excited states in conjugated polymers?
1997
- Essential excitations in phenylene-based conjugated polymers
1997
- Coulomb interactions and linear, nonlinear, and triplet absorption in poly(para-phenylenevinylene)
1997
- Energy diagram of triplet and singlet excited states in conjugated polymers
1997
- Excitons and optical absorption in one-dimensional extended Hubbard models with short- and long-range interactions
1997
- Systematic characterization of excited states in π -conjugated polymers
1997
- Optical absorption in the substituted PPVs: Theory and experiment
1997
- Theory of biexcitons in mixed and segregated stack charge-transfer solids, molecular crystals and π-conjugated polymers
1996
- A new class of collective excitations: Exciton strings
1996
- Exciton-to-biexciton transition in quasi-one-dimensional organics
1996
- Excitons and biexcitons in poly(para-phenylenevinylene)
1995
- Stable biexcitons in conjugated polymers
1995
- Theory of photoexcitations in phenylene-based polymers
1995
- Optical probes of excited states in poly(p-phenylenevinylene)
1994
- Even parity states in PPV, polythiophene and polysilanes
1994
- Exciton strings in an organic charge-transfer crystal
1994
- Four-level `essential states' model of an optical nonlinearity in π-conjugated polymers
1994
- Observation of three resonances in the third harmonic generation spectrum of conjugated polymers: Evidence for the four-level essential states model
1994
- Observation of excitonic strings in a quasi-one dimensional charge transfer crystal
1994
- Intensities of two-photon absorptions to low-lying even-parity states in linear-chain conjugated polymers
1994
- Excitons in poly(para-phenylenevinylene)
1994
- Leng et al. reply
1994
- Role of the conduction band in electroabsorption, two-photon absorption, and third-harmonic generation in polydiacetylenes
1993
- Excitonic n-string in linear chains
1993
- Coexisting CDW and BOW in organic conductors with non-half-filled bands
1993
- Metal-insulator transitions and electron-phonon interactions in organic conductors
1993
- A four-level essential states model of third order optical nonlinearity in π-conjugated polymers
1993
- High energy two-photon states in finite versus infinite polyenes
1992
- Microscopic theory of third-harmonic generation and electro-absorption in conjugated polymers
1992
- On the tight-binding theory of C sub 60 /sub
1992
- Comment on: Interchain dispersion and second hyperpolarizability of conjugated polymers
1992
- Electro-absorption in a polydiacetylene
1992
- Microscopic mechanism of optical nonlinearity in conjugated polymers and other quasi-one-dimensional systems
1991
- The phase diagram of 2:1 cationic organic charge transfer salts
1991
- Essential-states mechanism of optical nonlinearity in -conjugated polymers
1991
- Normal state broken symmetries in quasi-two-dimensional, quarter-filled charge-transfer solids
1991
- Roles of band states and two-photon transitions in the electroabsorption of a polydiacetylene
1991
- Determination of interaction parameters in peierls-hubbard models describing finite polyenes and polyacetylene
1991
- Excitonic optical nonlinearity in conjugated polymers and aromatic molecular chromophores - A theoretical approach
1991
- Novel valence-transition model for the pressure-induced metal-to-insulator transition in the organic conductor (2,5DM-DCNQI) sub 2 /sub Cu
1991
- Effects of zinc substitution on the electron superconductor Nd1.85Ce0.15CuO4-
1990
- Electronic excited states in conjugated polymers
1989
- Experimental predictions for the normal state of electron-doped high-temperature superconductors
1989
- Comment on peierls instability in the two-dimensional half-filled Hubbard model
1989
- Organic superconductivity: An experiment based theory
1988
- Coulomb correlations, broken symmetries and dimensionality effects
1988
- Towards a unified theory of segregated stack organic charge-transfer solids
1987
- Coulomb correlation effects in quasi-one-dimensional conductors
1986
- MOLECULAR DESIGN AND INTERPLAY OF STRUCTURAL, OPTICAL AND ELECTRONIC PROPERTIES IN POLYDIACETYLENES.
1986
- Bond alternation in the infinite polyene: Effect of long-range Coulomb interactions
1986
- Extended PPP model: 2 sup 1 /sup A and 1 sup 3 /sup B states of polydiacetylene fragments
1986
- Correlations and defect energies [1]
1986
- Quantum monte carlo studies of electron-electron interaction effects in conducting polymers
1986
- Unified theory of segregated-stack organic charge-transfer solids: Magnetic properties
1986
- MODIFIED PPP APPROACH TO POLYDIACETYLENE EXCITATIONS.
1986
- Broken Symmetries in a One-Dimensional Half-Filled Band with Arbitrarily Long-Range Coulomb Interactions
1985
- Electron-electron interactions and broken symmetry in one dimension
1984
- Soliton energetics in Peierls-Hubbard models
1984
- Electron-electron interaction effects on Peierls dimerization in a half-filled band
1984
- Correlation effects on charge-density waves in narrow-band one-dimensional conductors
1984
- Systematic trends in short-range coulomb effects among nearly one-dimensional organic conductors
1983
- Coulomb effects on one-dimensional peierls instability: The peierls-hubbard model
1983
- Valence-bond analysis of extended Hubbard models: Charge-transfer excitations of molecular conductors
1981
- Valence bond theory of narrow-band conductors
1979
- Magnetic analog of the mott transition
1979
- Magnetic gap and partial charge transfer in mixed donor-acceptor stacks
1978
- Neutral-ionic interface in organic charge-transfer salts
1978
- Triplet spin excitons in organic charge transfer complexes
1978
- VALENCE BOND THEORY OF ORGANIC CHARGE-TRANSFER SALTS.
1978