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Dive into the research topics where Keyu Pi is active.

Publication


Featured researches published by Keyu Pi.


Physical Review B | 2009

Electronic doping and scattering by transition metals on graphene

Keyu Pi; K. M. McCreary; Wenzhong Bao; Wei Han; Y. F. Chiang; Yan Li; Shan-Wen Tsai; C. N. Lau; Roland Kawakami

We investigate the effects of transition metals (TM) on the electronic doping and scattering in graphene using molecular-beam epitaxy combined with in situ transport measurements. The room-temperature deposition of TM onto graphene produces clusters that dope


Applied Physics Letters | 2009

Electrical detection of spin precession in single layer graphene spin valves with transparent contacts

Wei Han; Keyu Pi; Wenzhong Bao; K. M. McCreary; Yan Li; Wei-Hua Wang; C. N. Lau; Roland Kawakami

n


Physical Review Letters | 2010

Manipulation of spin transport in graphene by surface chemical doping.

Keyu Pi; Wei Han; K. M. McCreary; Adrian Swartz; Yan Li; Roland Kawakami

type for all TM investigated (Ti, Fe, and Pt). We also find that the scattering by TM clusters exhibits different behavior compared to


Applied Physics Letters | 2008

Growth of atomically smooth MgO films on graphene by molecular beam epitaxy

Wei-Hua Wang; Wei Han; Keyu Pi; K. M. McCreary; Feng Miao; Wenzhong Bao; C. N. Lau; Roland Kawakami

1/r


Proceedings of SPIE | 2009

Spin transport in graphite and graphene spin valves

Wei Han; Keyu Pi; Wei-Hua Wang; K. M. McCreary; Yan Li; Wenzhong Bao; P. Wei; Jing Shi; C. N. Lau; Roland Kawakami

Coulomb scattering. At high coverage, Pt films are able to produce doping that is either


Journal of Crystal Growth | 2009

Growth of single-crystalline, atomically smooth MgO films on Ge(0 0 1) by molecular beam epitaxy

Wei Han; Yi Zhou; Yong Wang; Yan Li; Jared J. I. Wong; Keyu Pi; Adrian Swartz; K. M. McCreary; Faxian Xiu; Kang L. Wang; Jin Zou; Roland Kawakami

n


Physical Review B | 2009

Oxidation-induced biquadratic coupling in Co/Fe/MgO/Fe(001)

Y. F. Chiang; Jared J. I. Wong; Xiaojing Tan; Yan Li; Keyu Pi; Wei-Hua Wang; H. W. K. Tom; Roland Kawakami

type or weakly


Bulletin of the American Physical Society | 2011

Enhanced spin injection and spin lifetime in Graphene

Wei Han; Keyu Pi; Kathleen M. McCreary; Yan Li; Roland Kawakami

p


Bulletin of the American Physical Society | 2010

Is Coulomb scattering important for spin relaxation in graphene

Keyu Pi; Wei Han; K. M. McCreary; Yan Li; Adrian Swartz; Roland Kawakami

type, which provides experimental evidence for a strong interfacial dipole favoring


Bulletin of the American Physical Society | 2010

Growth of Single-Crystalline, Atomically Smooth MgO Films on Ge(001) by Molecular Beam Epitaxy

Wei Han; Yi Zhou; Yong Wang; Yan Li; Jared J. I. Wong; Keyu Pi; Adrian Swartz; K. M. McCreary; Faxian Xiu; Kang L. Wang; Jin Zou; Roland Kawakami

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Yan Li

Los Alamos National Laboratory

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K. M. McCreary

University of California

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C. N. Lau

University of California

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Adrian Swartz

University of California

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Y. F. Chiang

University of California

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H. W. K. Tom

University of California

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