Liquid-crystalline medium

Liquid-crystalline medium comprising one or more compounds of formula A

• and, in addition
• one or more compounds selected from the group of compounds of formulae I and II
• wherein
• R01 and R02 each, independently of one another, denote a halogenated or unsubstituted alkyl radical having 1 to 15 C atoms, wherein one or more CH2 groups in these radicals may be replaced,
• independently of one another, by —C≡C—, —CH═CH—, —CF═CF—, —CF═CH—, —CH═CF—, —(CO)O—, —O(CO)—, —(CO)—, —O— or —S— in such a way that O or S atoms are not linked directly to one another,
• L01 and L02 denote H or CH3 with the proviso that one of L01 and L02 denotes H and the other of L01 and L02 denotes CH3,
• denotes
• L11 denotes alkyl having 1 to 6 C atoms, cycloalkyl having 3 to 6 C atoms or cycloalkenyl having 4 to 6 C atoms,
• X11 denotes H, alkyl having 1 to 3 C atoms or halogen,
• R11 to R14 independently of one another, denote unfluorinated alkyl or unfluorinated alkoxy, each having 1 to 15 C atoms, unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl, each having 2 to 15 C atoms, or cycloalkyl, alkylcycloalkyl, cycloalkenyl, alkylcycloalkenyl, alkylcycloalkylalkyl or alkylcycloalkenylalkyl, each having up to 15 C atoms, and alternatively one of R13 and R14 or both also denote H;
• L21 denotes R21 and, in the case where Z21 and/or Z22 denote trans-CH═CH— or trans-CF═CF—, alternatively also denotes X21,
• L22 denotes R22 and, in the case where Z21 and/or Z22 denote trans-CH═CH— or trans-CF═CF—, alternatively also denotes X22,
• R21 and R22 independently of one another, denote H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms,
• X21 and X22 independently of one another, denote F or Cl, —CN, —NCS, —SF5, fluorinated alkyl or alkoxy having 1 to 7 C atoms or fluorinated alkenyl, alkenyloxy or alkoxyalkyl having 2 to 7 C atoms,
• one of
• Z21 and Z22 denotes trans-CH═CH—, trans-CF═CF— or —C≡C— and the other, independently thereof, denotes trans-CH═CH—, trans-CF═CF— or a single bond, and
• independently of one another, denote