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Three-dimensional (3D) Dirac cones are predicted to reside in semimetals A3Bi (A=Na, K). By using molecular beam epitaxy (MBE) and scanning tunneling microscopy (STM), we have successfully established the growth conditions for Na3Bi thin films on Si(111)-7×7, and determined that the lattice of Na3Bi is rotated by 30 degree with respect to that of Si(111)-7×7. The Na3Bi/Si(111)-7×7 thin film was further...
We present the growth of atomically flat topological crystalline insulator (TCI) SnTe films on Si(111) substrate by molecular beam epitaxy (MBE). The growth condition for achieving high quality SnTe film was established by a combination of reflection high energy electron diffraction (RHEED) and scanning tunneling microscopy (STM) studies. In-situ angle resolved photoemission spectroscopy (ARPES) measurements...
Automatic steering system is a vital component of automatic driving. Automatic steering dynamics with preview point respect to road is established. Based on automatic control theory, further analysis on longitudinal velocity to system poles and look-ahead distance to zeros is done. Accordingly, a kind of look-ahead distance is discussed and a novel feedback control by adopting pole-displacement using...
Digital signature with message recovery is regard as a useful method to shorten signature. This paper presents an identity-based signature scheme with message recovery, which applies to the Combined Public Key System. The scheme is provable secure against existential forgery against adaptively chosen message and ID attacks in the random oracle model under the elliptic curve discrete logarithm assumption...
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