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将"金属-单分子-金属"模型化为分子导电纳米结,应用扩展主方程方法研究了红外光激发作用下弱耦合分子导电纳米结的非弹性电流的传导过程.分别采用偶极跃迁的指数耦合、平方耦合以及线性耦合模型描述红外光场与分子的相互作用,研究了不同光场作用下非弹性电流与所加电压的关系,并讨论了分子内振动能重新分布效应对电流-电压特性的影响.
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关键词:
- Franck-Condon阻滞 /
- 非弹性电流 /
- 电流-电压特性 /
- 红外光激发
Molecular nano-junction is modeled by 'metal/single molecule/metal’ structure. With the generalized master equation method, the inelastic current induced by the sequential charge transmission through the junction is studied under the excitation of infrared fields in the case of weak lead-molecule coupling.The interaction between infrared field and molecule is described with the models of exponential coupling, square coupling, and linear coupling respectively. In the excitation of varieties of infrared fields, the inelastic current-voltage characteristics and the effects of intramolecular vibrational energy redistribution are discussed.-
Keywords:
- Franck-Condon blockage /
- inelastic current /
- current- voltage characteristics /
- infrared excitation
[1] Galperin M, Nitzan A, Ratner M A 2006 Phys. Rev. B 73 045314
[2] Qiu X H, Nazin G V, Ho W 2004 Phys. Rev. Lett. 92 206102
[3] Mii T, Tikhodeev S G, Ueba H 2003 Phys. Rev. B 68 205406
[4] Harbola U, Esposito M, Mukamel S 2006 Phys. Rev. B 74 235309
[5] May V, Kühn O 2006 Chem. Rev. Lett. 420 192
[6] May V, Kühn O 2008 Phys. Rev. B 77 115439
[7] May V, Kühn O 2008 Phys. Rev. B 77 115440
[8] Koch J, Oppen F 2005 Phys. Rev. Lett. 94 206804
[9] Kaun C C, Seideman T 2005 Phys. Rev. Lett. 94 226801
[10] Li Z L, Wang C K, Luo Y, Xue Q K 2005 Chin. Phys. 14 1036
[11] Zou B, Wang C K, Luo Y, Xue Q K 2005 Acta Phys. Sin. 54 1341 (in Chinese) [邹 斌、李宗良、王传奎、薛其坤 2005 54 1341]
[12] Xia C J, Fang C F, Hu G C, Li D M, Liu D S, Xie S J 2007 Acta Phys. Sin. 56 4884 (in Chinese) [夏蔡娟、房常峰、胡贵超、李冬梅、刘德胜、解士杰 2007 56 4884]
[13] Xia C J, Fang C F, Hu G C, Li D M, Liu D S, Xie S J, Zhao M W 2008 Acta Phys. Sin. 57 3148 (in Chinese) [夏蔡娟、房 常峰、胡贵超、李冬梅、刘德胜、解士杰、赵明文 2008 57 3148] 〖14] Derosa P A, Seminario J M 2001 J. Phys. Chem. B 105 471
[14] Emberly E G, Kirczenow G 2003 Phys. Rev. Lett. 91 188301
[15] Zhang C, Du M H, Cheng H P, Zhang X G, Roitberg A E, Krause J L 2004 Phys. Rev. Lett. 92 158301
[16] Pati R, Karna S P 2004 Phys. Rev. B 69 1555419
[17] Haken H, Wolf H C 1999 Molecular Physics and Elements of Quantum Chemistry (China: BeiJing World Publishing Corporation) p145
[18] May V, Kühn O 2004 Charge and Energy Transfer Dynamics in Molecular Systems (2st ed) (German: WILEY-VCH Verlag GmbH Co. KGaA) p141
[19] Wu S W, Nazin G V, Ho W 2008 Phys. Rev. B 77 205430
[20] Hartle R, Benesch C, Thoss M 2009 Phys. Rev. Lett. 102 146801
[21] Gruhn N E, Macías-Ruvalcaba N A, Evans D H 2006 J. Phys. Chem. A 110 5650
[22] Zhang Y, Wang L X 2010 Acta Phys. Sin. 59 231 (in Chinese) [张 元、王鹿霞 2010 59 231]
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[1] Galperin M, Nitzan A, Ratner M A 2006 Phys. Rev. B 73 045314
[2] Qiu X H, Nazin G V, Ho W 2004 Phys. Rev. Lett. 92 206102
[3] Mii T, Tikhodeev S G, Ueba H 2003 Phys. Rev. B 68 205406
[4] Harbola U, Esposito M, Mukamel S 2006 Phys. Rev. B 74 235309
[5] May V, Kühn O 2006 Chem. Rev. Lett. 420 192
[6] May V, Kühn O 2008 Phys. Rev. B 77 115439
[7] May V, Kühn O 2008 Phys. Rev. B 77 115440
[8] Koch J, Oppen F 2005 Phys. Rev. Lett. 94 206804
[9] Kaun C C, Seideman T 2005 Phys. Rev. Lett. 94 226801
[10] Li Z L, Wang C K, Luo Y, Xue Q K 2005 Chin. Phys. 14 1036
[11] Zou B, Wang C K, Luo Y, Xue Q K 2005 Acta Phys. Sin. 54 1341 (in Chinese) [邹 斌、李宗良、王传奎、薛其坤 2005 54 1341]
[12] Xia C J, Fang C F, Hu G C, Li D M, Liu D S, Xie S J 2007 Acta Phys. Sin. 56 4884 (in Chinese) [夏蔡娟、房常峰、胡贵超、李冬梅、刘德胜、解士杰 2007 56 4884]
[13] Xia C J, Fang C F, Hu G C, Li D M, Liu D S, Xie S J, Zhao M W 2008 Acta Phys. Sin. 57 3148 (in Chinese) [夏蔡娟、房 常峰、胡贵超、李冬梅、刘德胜、解士杰、赵明文 2008 57 3148] 〖14] Derosa P A, Seminario J M 2001 J. Phys. Chem. B 105 471
[14] Emberly E G, Kirczenow G 2003 Phys. Rev. Lett. 91 188301
[15] Zhang C, Du M H, Cheng H P, Zhang X G, Roitberg A E, Krause J L 2004 Phys. Rev. Lett. 92 158301
[16] Pati R, Karna S P 2004 Phys. Rev. B 69 1555419
[17] Haken H, Wolf H C 1999 Molecular Physics and Elements of Quantum Chemistry (China: BeiJing World Publishing Corporation) p145
[18] May V, Kühn O 2004 Charge and Energy Transfer Dynamics in Molecular Systems (2st ed) (German: WILEY-VCH Verlag GmbH Co. KGaA) p141
[19] Wu S W, Nazin G V, Ho W 2008 Phys. Rev. B 77 205430
[20] Hartle R, Benesch C, Thoss M 2009 Phys. Rev. Lett. 102 146801
[21] Gruhn N E, Macías-Ruvalcaba N A, Evans D H 2006 J. Phys. Chem. A 110 5650
[22] Zhang Y, Wang L X 2010 Acta Phys. Sin. 59 231 (in Chinese) [张 元、王鹿霞 2010 59 231]
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