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Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass
นักวิจัย : Vegge, Tejs , Sethna, James. P. , Cheong, Siew Ann , Jacobsen, K. W. , Myers, Christopher R. , Ralph, Daniel C.
คำค้น : DRNTU::Science::Physics::Atomic physics::Solid state physics
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2544
อ้างอิง : Vegge, T., Sethna, J. P., Cheong, S. A., Jacobsen, K. W., Myers, C. R., & Ralph, D. C. (2001). Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass. Physical Review Letters, 86(8), 1546-1549. , 0031-9007 , http://hdl.handle.net/10220/4592 , http://sfxna09.hosted.exlibrisgroup.com:3410/ntu/sfxlcl3?sid=metalib:CSA_MEDLINE&id=doi:&genre=&isbn=&issn=0031-9007&date=2001&volume=86&issue=8&spage=1546&epage=9&aulast=Vegge&aufirst=%20T&auinit=&title=Physical%20review%20letters&atitle=Calculation%20of%20quantum%20tunneling%20for%20a%20spatially%20extended%20defect%3A%20the%20dislocation%20kink%20in%20copper%20has%20a%20low%20effective%20mass%2E , http://dx.doi.org/10.1103/PhysRevLett.86.1546
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Physical review letters
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Several experiments indicate that there are atomic tunneling defects in plastically deformed metals. How this is possible has not been clear, given the large mass of the metal atoms. Using a classical molecular-dynamics calculation, we determine the structures, energy barriers, effective masses, and quantum tunneling rates for dislocation kinks and jogs in copper screw dislocations. We find that jogs are unlikely to tunnel, but the kinks should have large quantum fluctuations. The kink motion involves hundreds of atoms each shifting a tiny amount, leading to a small effective mass and tunneling barrier.

บรรณานุกรม :
Vegge, Tejs , Sethna, James. P. , Cheong, Siew Ann , Jacobsen, K. W. , Myers, Christopher R. , Ralph, Daniel C. . (2544). Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Vegge, Tejs , Sethna, James. P. , Cheong, Siew Ann , Jacobsen, K. W. , Myers, Christopher R. , Ralph, Daniel C. . 2544. "Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Vegge, Tejs , Sethna, James. P. , Cheong, Siew Ann , Jacobsen, K. W. , Myers, Christopher R. , Ralph, Daniel C. . "Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2544. Print.
Vegge, Tejs , Sethna, James. P. , Cheong, Siew Ann , Jacobsen, K. W. , Myers, Christopher R. , Ralph, Daniel C. . Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2544.