TY - JOUR
T1 - Softening of DNA near melting as disappearance of an emergent property
AU - Majumdar, Debjyoti
AU - Bhattacharjee, Somendra M.
N1 - Funding Information:
Computations performed on a FUJITSU high-performance computing facility (SAMKHYA) at the Institute Of Physics Bhubaneswar. D.M. acknowledges the hospitality of Ashoka University where a part of this work was done. S.M.B. acknowledges support from the JCBose Fellowship grant.
Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/9/16
Y1 - 2020/9/16
N2 - Near the melting transition the bending elastic constant κ, an emergent property of double-stranded DNA (dsDNA), is shown not to follow the rodlike scaling for small-length N. The reduction in κ with temperature is determined by the denatured bubbles for a continuous transition, e.g., when the two strands are Gaussian, but by the broken bonds near the open end in a Y-like configuration for a first-order transition as for strands with excluded volume interactions. In the latter case, a lever rule is operational, implying a phase coexistence although dsDNA is known to be a single phase.
AB - Near the melting transition the bending elastic constant κ, an emergent property of double-stranded DNA (dsDNA), is shown not to follow the rodlike scaling for small-length N. The reduction in κ with temperature is determined by the denatured bubbles for a continuous transition, e.g., when the two strands are Gaussian, but by the broken bonds near the open end in a Y-like configuration for a first-order transition as for strands with excluded volume interactions. In the latter case, a lever rule is operational, implying a phase coexistence although dsDNA is known to be a single phase.
UR - http://www.scopus.com/inward/record.url?scp=85093911192&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.102.032407
DO - 10.1103/PhysRevE.102.032407
M3 - Article
C2 - 33075941
AN - SCOPUS:85093911192
VL - 102
JO - Physical Review E
JF - Physical Review E
SN - 2470-0045
IS - 3
M1 - 032407
ER -