Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.096602
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Funding
- BSR program by the National Research Foundation of Korea (NRF) [2009-0076700, 2012-003040]
- SRC program by the National Research Foundation of Korea (NRF) [2011-0030785, 2011-0030788]
- WCU program by the National Research Foundation of Korea (NRF) [R31-2008-000-10057-0]
- CRC program by the National Research Foundation of Korea (NRF) [2010K000981]
- NMTD program by the National Research Foundation of Korea (NRF) [2012M3A7B4049888]
- Ministry of Education, Science and Technology
- National Research Council of Science & Technology (NST), Republic of Korea [2Z03880] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2011-0030785, 2009-0076700, R31-2012-000-10057-0, 2011-0030046, 2011-0030788, 2012M3A7B4049888, 2012R1A2A1A01003040, R31-2008-000-10057-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Coherent motion of electrons in Bloch states is one of the fundamental concepts of charge conduction in solid-state physics. In layered materials, however, such a condition often breaks down for the interlayer conduction, when the interlayer coupling is significantly reduced by, e. g., a large interlayer separation. We report that complete suppression of coherent conduction is realized even in an atomic length scale of layer separation in twisted bilayer graphene. The interlayer resistivity of twisted bilayer graphene is much higher than the c-axis resistivity of Bernal-stacked graphite and exhibits strong dependence on temperature as well as on external electric fields. These results suggest that the graphene layers are significantly decoupled by rotation and incoherent conduction is a main transport channel between the layers of twisted bilayer graphene. DOI: 10.1103/PhysRevLett.110.096602
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