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Lang DV, Chi X, Siegrist T, Sergent AM, Ramirez AP. Bias-dependent generation and quenching of defects in pentacene. PHYSICAL REVIEW LETTERS 2004; 93:076601. [PMID: 15324261 DOI: 10.1103/physrevlett.93.076601] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2003] [Indexed: 05/24/2023]
Abstract
We describe a defect generation phenomenon that is new to organic semiconductors. A defect in pentacene single crystals can be created by bias-stress and persists at room temperature for an hour in the dark but only seconds with 420 nm illumination. The defect gives rise to a hole trap at Ev+0.38 eV and causes metastable transport effects at room temperature. Creation and decay rates of the hole trap have a 0.67 eV activation energy with a small (10(8) s(-1)) prefactor, suggesting that atomic motion plays a key role in the generation and quenching process.
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Delattre JL, Stacy AM, Siegrist T. Structure of ten-layer orthorhombic Ba5Fe5O14 (BaFeO2.8) determined from single crystal X-ray diffraction. J SOLID STATE CHEM 2004. [DOI: 10.1016/j.jssc.2003.09.032] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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28
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Pal SK, Itkis ME, Reed RW, Oakley RT, Cordes AW, Tham FS, Siegrist T, Haddon RC. Synthesis, Structure and Physical Properties of the First One-Dimensional Phenalenyl-Based Neutral Radical Molecular Conductor. J Am Chem Soc 2004; 126:1478-84. [PMID: 14759205 DOI: 10.1021/ja037864f] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the preparation, crystallization, and solid-state characterization of a benzyl-substituted spirobiphenalenyl radical. The crystal structure shows that the radical is monomeric in the solid state, with the molecules packed in an unusual one-dimensional (1-D) fashion that we refer to as a pi-step stack. This particular mode of 1-D stacking is forced on the lattice arrangement by the presence of the orthogonal phenalenyl units that were specifically incorporated to prevent the crystallization of low-dimensional structures. The structure shows that this strategy is effective, and neighboring molecules in the stack can only interact via the overlap of one pair of active (spin-bearing) carbon atoms per phenalenyl unit, leading to the pi-step structure in which the remaining four active carbon atoms per phenalenyl unit do not interact with nearest neighbor molecules. The magnetic susceptibility data in the temperature range 4-360 K may be fit to an antiferromagnetic Heisenberg S = 1/2 linear chain model with intrachain spin coupling J = -52.3 cm(-1). Despite the uniform stacking, the material has a room temperature conductivity of 1.4 x 10(-3) S/cm and is best described as a Mott insulator.
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Besnard C, Svensson C, Ståhl K, Siegrist T. Re4As6S3, a thio-spinel-related cluster system. J SOLID STATE CHEM 2003. [DOI: 10.1016/s0022-4596(03)00032-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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30
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Schön JH, Kloc C, Siegrist T, Steigerwald M, Svensson C, Batlogg B. Retraction: Superconductivity in single crystals of the fullerene C70. Nature 2003; 422:92. [PMID: 12621439 DOI: 10.1038/nature01463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Siegrist T, Kloc C, Schoen JH. Organic electronic materials. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302090128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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32
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Haddon RC, Chi X, Itkis ME, Anthony JE, Eaton DL, Siegrist T, Mattheus CC, Palstra TTM. Band Electronic Structure of One- and Two-Dimensional Pentacene Molecular Crystals. J Phys Chem B 2002. [DOI: 10.1021/jp0207937] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Hessen B, Siegrist T, Palstra T, Tanzler SM, Steigerwald ML. Hexakis(triethylphosphine)octatelluridohexachromium and a molecule-based synthesis of chromium telluride, Cr3Te4. Inorg Chem 2002. [DOI: 10.1021/ic00075a037] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Brennan JG, Siegrist T, Kwon YU, Stuczynski SM, Steigerwald ML. Nickel-selenium-triethylphosphine (Ni23Se12(PEt3)13), an intramolecular intergrowth of nickel selenide (NiSe) and nickel. J Am Chem Soc 2002. [DOI: 10.1021/ja00052a034] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Brennan JG, Siegrist T, Stuczynski SM, Steigerwald ML. The transition from molecules to solids: molecular syntheses of Ni9Te6(PEt3)8, Ni20Te18(PEt3)12 and NiTe. J Am Chem Soc 2002. [DOI: 10.1021/ja00208a023] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Steigerwald ML, Siegrist T, Stuczynski SM. Octatelluridohexakis(triethylphosphine)hexacobalt and a connection between Chevrel clusters and the NiAs structure. Inorg Chem 2002. [DOI: 10.1021/ic00010a005] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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Steigerwald ML, Siegrist T, Gyorgy EM, Hessen B, Kwon YU, Tanzler SM. effect of Diverse Ligands on the Course of a Molecules-to-Solids Process and Properties of Its Intermediates. Inorg Chem 2002. [DOI: 10.1021/ic00093a030] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Brennan JG, Siegrist T, Stuczynski SM, Steigerwald ML. Cluster intermediates in an organometallic synthesis of palladium telluride PdTe. J Am Chem Soc 2002. [DOI: 10.1021/ja00181a027] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Steigerwald ML, Siegrist T, Stuczynski SM. Initial stages in the molecule-based growth of the solid-state compound cobalt telluride (CoTe). Inorg Chem 2002. [DOI: 10.1021/ic00026a018] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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Steigerwald ML, Siegrist T, Stuczynski SM, Kwon YU. Iron telluride (Et3P)4Fe4Te4: an intermediate between molecular reagents and solid state products. J Am Chem Soc 2002. [DOI: 10.1021/ja00034a081] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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41
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Gross ME, Siegrist T. Molecular precursor chemistry for titanium nitride: synthesis and structure of [Ti(NMe2)(N3)(.mu.-NMe2)]3(.mu.3-N3)(.mu.3-NH). Inorg Chem 2002. [DOI: 10.1021/ic00049a034] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Brennan JG, Siegrist T, Carroll PJ, Stuczynski SM, Brus LE, Steigerwald ML. The preparation of large semiconductor clusters via the pyrolysis of a molecular precursor. J Am Chem Soc 2002. [DOI: 10.1021/ja00193a079] [Citation(s) in RCA: 154] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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Ng H, Gmachl C, Siegrist T, Chu S, Cho A. Growth and Characterization of GaN/AlGaN Superlattices for Near-Infrared Intersubband Transitions. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/1521-396x(200112)188:2<825::aid-pssa825>3.0.co;2-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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44
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Schön JH, Kloc C, Siegrist T, Steigerwald M, Svensson C, Batlogg B. Superconductivity in single crystals of the fullerene C70. Nature 2001; 413:831-3. [PMID: 11677603 DOI: 10.1038/35101577] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The observation of superconductivity in doped C60 has attracted much attention, as these materials represent an entirely new class of superconductors. A maximum transition temperature (Tc) of 40 K has been reported for electron-doped C60 crystals, while a Tc of 52 K has been seen in hole-doped crystals; only the copper oxide superconductors have higher transition temperatures. The results for C60 raise the intriguing questions of whether conventional electron-phonon coupling alone can produce such high transition temperatures, and whether even higher transition temperatures might be observed in other fullerenes. There have, however, been no confirmed reports of superconductivity in other fullerenes, though it has recently been observed in carbon nanotubes. Here we report the observation of superconductivity in single crystals of electric-field-doped C70. The maximum transition temperature of about 7 K is achieved when the sample is doped to approximately four electrons per C70 molecule, which corresponds to a half-filled conduction band. We anticipate superconductivity in smaller fullerenes at temperatures even higher than in C60 if the right charge density can be induced.
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Siegrist T, Vanderah TA, Roth RS. Microwave ceramics. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396085145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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47
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Özdaş E, Kortan AR, Kopylov N, Ramirez AP, Siegrist T, Rabe KM, Bair HE, Schuppler S, Citrin PH. Superconductivity and cation-vacancy ordering in the rare-earth fulleride Yb2.75C60. Nature 1995. [DOI: 10.1038/375126a0] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Haddon RC, Siegrist T, Fleming RM, Bridenbaugh PM, Laudise RA. Band structures of organic thin-film transistor materials. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/jm9950501719] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Wang LH, Schneemeyer L, Cava R, Siegrist T. A New Barium Scandium Silicate: Ba9Sc2(SiO4)6. J SOLID STATE CHEM 1994. [DOI: 10.1006/jssc.1994.1361] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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50
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Cava RJ, Siegrist T, Batlogg B, Takagi H, Eisaki H, Carter SA, Krajewski JJ, Peck WF. Elementary physical properties and crystal structures of LaRh2B2C and LaIr2B2C. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:12966-12968. [PMID: 9975466 DOI: 10.1103/physrevb.50.12966] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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