TY - JOUR
T1 - Observation of phonon stop band in Langmuir-Blodgett multilayer film
AU - Takeuchi, Shigeki
AU - Nogami, Yoshio
AU - Ishiguro, Takehiko
N1 - Funding Information:
units with CO2 bases and Cd 2+ ions. At folding end, satisfying ka = mr (n = 0, 1, 2...), phonon energy gaps called phonon stop band appears. The phonons with frequency within the stop band cannot propagate. The observed dip in the transmitting phonon spectra shown in Fig. 1 is ascribed to the effect of the phonon stop band. Comparing the dip frequency to the phonon stop band, we get the longitudinal sound velocity to be 5.2 x 10 3 m/s. According to the Brillouin scattering \[2\]t,h e longitudinal sound velocity of the Cd arachidate at 30 GHz is 3.98 × 103 m/s at room temperature, which is expected to increase by decreasing temperature and get close to the present value. We thank It. Kitabayashi for superconducting tunneling device development. This work was supported by a Gant-in-Aid for Scientific Research (No 420008) from the Ministry of Education, Science and Culture.
PY - 1994/2/2
Y1 - 1994/2/2
N2 - Using superconducting tunnel junctions, phonon transmission for Langmuir-Blodgett (LB) multilayer has been studied spectroscopically. A film with 9 layers of Cd arachidate is formed on a sapphire substrate which passes longitudinal phonon as focusing mode. We find a pronounced decrease in transmission centering 420 GHz corresponding to phonon stop band.
AB - Using superconducting tunnel junctions, phonon transmission for Langmuir-Blodgett (LB) multilayer has been studied spectroscopically. A film with 9 layers of Cd arachidate is formed on a sapphire substrate which passes longitudinal phonon as focusing mode. We find a pronounced decrease in transmission centering 420 GHz corresponding to phonon stop band.
UR - http://www.scopus.com/inward/record.url?scp=0028759894&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028759894&partnerID=8YFLogxK
U2 - 10.1016/0921-4526(94)90566-5
DO - 10.1016/0921-4526(94)90566-5
M3 - Article
AN - SCOPUS:0028759894
VL - 194-196
SP - 473
EP - 474
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - PART 1
ER -