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Potential for exciton condensation in a highly conductive amorphous polymer

Journal Article · · Physical Review Materials

An outstanding challenge in synthesis and theory is to develop molecular materials at ambient conditions that exhibit highly efficient energy transfer. Here, in this study, we demonstrate the potential of a recently synthesized, highly conductive amorphous material—a nickel tetrathiafulvalene-tetrathiolate (NiTTFtt) polymer—to become an exciton condensate—a Bose-Einstein condensate of particle-hole pairs, known as excitons, that supports dissipationless flow of excitation energy. While exciton condensates have recently been realized in ordered materials, we show by advanced electronic structure calculations that this highly correlated phenomenon can potentially be realized in molecularly tailored, amorphous materials. In contrast to the Bechgaard salts that support superconductivity at compressed geometries requiring high pressures, we show that the recently synthesized, amorphous NiTTFtt polymer exhibits the computational signature of exciton condensation at experimentally realizable geometries, occurring at ambient pressures. Results suggest that superfluidity in this system and related systems—including van der Waals structures, molecular metals with extended-TTF dithiolate ligands, and Bechgaard salts—may occur via a nontraditional excitonic mechanism tuneable according to system composition, geometry, size, and charge. This study prompts further experimental investigation of the rational design of molecularly scaled exciton condensates with potential applications to efficient transport in technologically relevant materials.

Research Organization:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); American Chemical Society (ACS)
Grant/Contract Number:
SC0019215
OSTI ID:
2421041
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 4 Vol. 7; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (74)

Reduced‐Density‐Matrix Mechanics: With Application to Many‐Electron Atoms and Molecules book March 2007
Organic Conductors: From Charge Density Wave TTF?TCNQ to Superconducting (TMTSF)2PF6 journal February 2005
Plancks Gesetz und Lichtquantenhypothese journal December 1924
Exciton condensation in coupled quantum wells journal July 2003
TTF[Ni(dmit)2]2: From single-crystals to thin layers, nanowires, and nanoparticles journal February 2016
Organic superconductors: The Bechgaard salts and relatives journal July 2015
Entangled Electrons Drive a Non-superexchange Mechanism in a Cobalt Quinoid Dimer Complex journal May 2020
Exciton Condensation in Molecular-Scale van der Waals Stacks journal October 2021
Entangled Electrons Foil Synthesis of Elusive Low-Valent Vanadium Oxo Complex journal January 2016
Single-Component Molecular Metals with Extended-TTF Dithiolate Ligands journal November 2004
Molecular Conductors and Superconductors Based on Trihalides of BEDT-TTF and Some of Its Analogues journal November 2004
Two-Electron Reduced Density Matrix as the Basic Variable in Many-Electron Quantum Chemistry and Physics journal August 2011
A Single-Component Molecular Superconductor journal May 2014
High-Pressure (up to 10.7 GPa) Crystal Structure of Single-Component Molecular Metal [Au(tmdt) 2 ] journal May 2009
Reversible Switching of Organic Diradical Character via Iron-Based Spin-Crossover journal September 2020
Bose–Einstein condensation of excitons in bilayer electron systems journal December 2004
Bose–Einstein condensation of exciton polaritons journal September 2006
High-temperature superfluidity with indirect excitons in van der Waals heterostructures journal July 2014
How to make a bilayer exciton condensate flow journal August 2008
Quantum Hall drag of exciton condensate in graphene journal May 2017
Carbon nanotubes as excitonic insulators journal November 2017
Superconductivity at 250 K in lanthanum hydride under high pressures journal May 2019
Evidence of high-temperature exciton condensation in two-dimensional atomic double layers journal October 2019
Strongly correlated excitonic insulator in atomic double layers journal October 2021
Intrinsic glassy-metallic transport in an amorphous coordination polymer journal October 2022
Ligand non-innocence and strong correlation in manganese superoxide dismutase mimics journal January 2017
Single-component molecular conductor [Pt(dmdt) 2 ]—a three-dimensional ambient-pressure molecular Dirac electron system journal January 2019
Signature of van der Waals interactions in the cumulant density matrix journal January 2019
Redox, transmetalation, and stacking properties of tetrathiafulvalene-2,3,6,7-tetrathiolate bridged tin, nickel, and palladium compounds journal January 2020
Molecular design and development of single-component molecular metals journal January 2001
Recent progress on conducting organic charge-transfer salts journal January 1991
Superconductivity in a synthetic organic conductor (TMTSF)2PF 6 journal January 1980
Variational calculations of fermion second-order reduced density matrices by semidefinite programming algorithm journal May 2001
The reduced density matrix method for electronic structure calculations and the role of three-index representability conditions journal February 2004
Particle‐Hole Matrix: Its Connection with the Symmetries and Collective Features of the Ground State journal October 1969
The electronic ground-state energy problem: A new reduced density matrix approach journal August 2006
Active-space two-electron reduced-density-matrix method: Complete active-space calculations without diagonalization of the N-electron Hamiltonian journal October 2008
Electron-hole Superconductivity (Review) journal September 2018
Correlation-driven phenomena in periodic molecular systems from variational two-electron reduced density matrix theory journal June 2021
Beginnings of exciton condensation in coronene analog of graphene double layer journal April 2022
Van der Waals Interactions and Exciton Condensation journal December 1971
Twenty-five Years of High-Temperature Superconductivity – A Personal Review journal July 2013
Bose-Einstein Condensation and Liquid Helium journal November 1956
Theory of Superconductivity journal December 1957
Bose-Einstein Condensation of Excitons journal June 1962
Eigenvalues of Fermion Density Matrices journal June 1965
On the Bose-Einstein Condensation journal December 1938
The Connection Between Spin and Statistics journal October 1940
The Theory of Liquid Helium journal November 1947
Pure- N -representability conditions of two-fermion reduced density matrices journal September 2016
Potential coexistence of exciton and fermion-pair condensations journal February 2020
Room-temperature superfluidity in graphene bilayers journal September 2008
Low-temperature structural effects in the (TMTSF) 2 PF 6 and AsF 6 Bechgaard salts journal July 2013
Spatially indirect exciton condensate phases in double bilayer graphene journal January 2017
Quantum signature of exciton condensation journal July 2018
Active-Space N -Representability Constraints for Variational Two-Particle Reduced Density Matrix Calculations journal November 2010
Large-Scale Semidefinite Programming for Many-Electron Quantum Mechanics journal February 2011
Variational Two-Particle Density Matrix Calculation for the Hubbard Model Below Half Filling Using Spin-Adapted Lifting Conditions journal May 2012
Structure of Fermionic Density Matrices: Complete N -Representability Conditions journal June 2012
Global Method for Electron Correlation journal August 2017
Condensation of Indirect Excitons in Coupled AlAs/GaAs Quantum Wells journal July 1994
Vanishing Hall Resistance at High Magnetic Field in a Double-Layer Two-Dimensional Electron System journal July 2004
Counterflow Measurements in Strongly Correlated GaAs Hole Bilayers: Evidence for Electron-Hole Pairing journal July 2004
Realization of Quantum Chemistry without Wave Functions through First-Order Semidefinite Programming journal November 2004
Signatures of a degenerate many-body state of interlayer excitons in a van der Waals heterostack journal December 2020
Preparation of an exciton condensate of photons on a 53-qubit quantum computer journal November 2020
Chasing the Exciton Condensate journal July 2016
Concept of Off-Diagonal Long-Range Order and the Quantum Phases of Liquid He and of Superconductors journal October 1962
Structure of Fermion Density Matrices journal July 1963
Two Kinds of Bosons and Bose Condensates journal January 1970
Signatures of exciton condensation in a transition metal dichalcogenide journal December 2017
Electron Pairs in the Theory of Superconductivity journal March 1960
The Crystal Structure of (TMTTF)2ReO4 journal July 1984
Coherent states of excitons journal November 2017

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