Dissipation in the Mixed State: Local or Nonlocal?

Doyle and Campbell Reply:

“…1. h 2 ͑T ͒ obtained from Eqs. (1) ͑h ab ͒ and (3) ͑h c ͒ in the preceding Comment [6] and the data in Ref. [2].…”

“…Small differences in the apparent anisotropy for currents parallel to the ab plane and c axis indeed exist at small signal levels as pointed out by Levin [6]. While we cannot preclude nonlocal effects as the origin of these effects, the change in sign of the discrepancy in h, the small signal levels at which this parameter is evaluated in [6], and the absence of any theoretical prediction about the expected size and direction of the effect make this conclusion seem less likely.…”

“…Just below 75 K, where [6] is focused, h 2 c is indeed larger than h 2 ab as shown by Levin [6]. However, the discrepancy, when a contact spacing of 0.25 mm rather than 0.5 mm is used, is smaller with a ratio of about 2.3 rather than the value of 5.3 in [6]. The discrepancy appears to be systematic and is not easily explained [although the value of h c approaches the limits of validity of the assumptions in Eq.…”

“…While we cannot preclude nonlocal effects as the origin of these effects, the change in sign of the discrepancy in h, the small signal levels at which this parameter is evaluated in [6], and the absence of any theoretical prediction about the expected size and direction of the effect make this conclusion seem less likely. Similar considerations should also pertain to other data supporting nonlocal behavior.…”

Flux lattice melting and nonlocal electrodynamics inYBa2Cu3O7<

“…Figure 4 shows the apparent resistivity ratio c / ab calculated from the voltage ratio V 48 /V 37 as described in Ref. 11. In the left panel at Bϭ2 T, c / ab diverges when approaching T br in orientation 2, and T m in orientation 1.…”