Table 1 Survey of acoustic waveguide and substrate materials

From: Phononic integrated circuitry and spin–orbit interaction of phonons

Material

Longitudinal wave speed (m s−1)

Transverse wave speed (m s−1)

Piezoelectricity

GaN54

7350

4578

Yes

AlN54

10,169

6369

Yes

Quartz55

5700

3158

Yes

Sapphire56

10,658

5796

No

Silicon57

8433

5843

No

Silica55

5800

3700

No

Diamond58

18,000

12000

No

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