Coherent particle response of two-dimensional organic conductors upon crossing the Mott transition
The two-dimensional organic charge-transfer salt κ-(BEDT-TTF)2Cu[N(CN)2]-BrxCl1–x is tuned across the metal-insulator transition by varying the Br content. Temperature dependent measurements of the optical conductivity yield information on the electrodynamics of the half-filled correlated electron s...
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| Published in | Journal of physics. Conference series Vol. 200; no. 1; p. 012029 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Bristol
IOP Publishing
01.01.2010
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| Subjects | |
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| ISSN | 1742-6596 1742-6588 1742-6596 |
| DOI | 10.1088/1742-6596/200/1/012029 |
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| Abstract | The two-dimensional organic charge-transfer salt κ-(BEDT-TTF)2Cu[N(CN)2]-BrxCl1–x is tuned across the metal-insulator transition by varying the Br content. Temperature dependent measurements of the optical conductivity yield information on the electrodynamics of the half-filled correlated electron system. At room temperature a broad incoherent response is observed with no clear Drude peak. As the temperature drops below 50 K, an energy gap develops in the Cl-rich samples which grows to approximately 1000 cm−1 for T → 0. With increasing Br concentration spectral weight shifts into the gap region and eventually fills it up completely. A Drude-like component develops due to the coherent quasiparticles. |
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| AbstractList | The two-dimensional organic charge-transfer salt κ-(BEDT-TTF)2Cu[N(CN)2]-BrxCl1–x is tuned across the metal-insulator transition by varying the Br content. Temperature dependent measurements of the optical conductivity yield information on the electrodynamics of the half-filled correlated electron system. At room temperature a broad incoherent response is observed with no clear Drude peak. As the temperature drops below 50 K, an energy gap develops in the Cl-rich samples which grows to approximately 1000 cm−1 for T → 0. With increasing Br concentration spectral weight shifts into the gap region and eventually fills it up completely. A Drude-like component develops due to the coherent quasiparticles. |
| Author | Dumm, M Drichko, N Batail, P Dressel, M Méziere, C |
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| CitedBy_id | crossref_primary_10_1103_PhysRevX_10_031028 crossref_primary_10_1103_PhysRevLett_127_197002 |
| Cites_doi | 10.1007/978-3-642-58262-2 10.1021/cr030646k 10.1023/A:1012696314318 10.1103/PhysRevLett.100.086404 10.1103/PhysRevB.61.7996 10.1134/S1063783409050242 10.1007/3-540-14858-2 10.1103/PhysRevLett.37.36 10.1103/PhysRevB.64.045103 10.1142/S0217979298000909 10.1017/CBO9780511606168 10.1103/PhysRevB.76.165113 10.1103/PhysRevB.79.195106 10.1016/j.physb.2008.11.051 10.1021/cr030642f |
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| DOI | 10.1088/1742-6596/200/1/012029 |
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| References | 11 12 Mott N F (1) 1974 13 15 16 17 19 Jérome D (3) 1994 Dressel M (18) 2002 McKenzie R H (5) 1998; 18 6 7 8 Gebhard F (2) 1997 9 Delhaes P (14) 1993; 22 Ishiguro T (4) 1998 10 |
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| Snippet | The two-dimensional organic charge-transfer salt κ-(BEDT-TTF)2Cu[N(CN)2]-BrxCl1–x is tuned across the metal-insulator transition by varying the Br content.... |
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| SubjectTerms | Charge transfer Conductors Electrodynamics Elementary excitations Energy gap Insulators Metal-insulator transition Organic charge transfer salts Physics Room temperature Temperature dependence |
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| Title | Coherent particle response of two-dimensional organic conductors upon crossing the Mott transition |
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